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The Fornax3D project: Planetary nebulae catalogue and independent distance measurements to Fornax cluster galaxies. (2021) T. W. Spriggs, M. Sarz, P. M. Galán-de Anta, R. Napiwotzki, S. Viaene, B. Nedelchev, L. Coccato, E. M. Corsini, K. Fahrion, J. Falcón-Barroso, D. A. Gadotti, E. Iodice, M. Lyubenova, I. Martín-Navarro, R. M. McDermid, L. Morelli, F. Pinna, G. van de Ven, P. T. de Zeeuw and L. Zhu

The ESO supernovae type Ia progenitor survey (SPY) : The radial velocities of 644 DA white dwarfs. (2019) R. Napiwotzki, C. A. Karl, T. Lisker, S. Catalan, H. Drechsel, U. Heber, D. Homeier, D. Koester, B. Leibundgut, T. R. Marsh, S. Moehler, G. Nelemans, D. Reimers, A. Renzini, A. Stroer and L. Yungelson

Massive stars in the hinterland of the young cluster, Westerlund 2. (2018) J. E. Drew, A. Herrero, M. Mohr-Smith, M. Monguio, N. J. Wright, T. Kupfer and R. Napiwotzki

A search for white dwarfs in the Galactic plane: : the field and the open cluster population. (2016) R. Raddi, S. Catalan, B. T. Gaensicke, J. J. Hermes, R. Napiwotzki, D. Koester, P. -E. Tremblay, G. Barentsen, H. J. Farnhill, M. Mohr-Smith, J. E. Drew, P. J. Groot, L. Guzman-Ramirez, Q. A. Parker, D. Steeghs and A. Zijlstra

New OB star candidates in the Carina Arm around Westerlund 2 from VPHAS+. (2015) M. Mohr-Smith, J.E. Drew, G. Barentsen, N. J. Wright, R. Napiwotzki, R.L.M. Corradi, J. Eislöffel, P. Groot, V. Kalari, Q. A. Parker, Roberto Raddi, S. E. Sale, Y.C. Unruh, J. S. Vink and R. Wesson

The AGB population in IC 1613 using JHK photometry. (2015) L. F. Sibbons, Sean G. Ryan, M. Irwin and R. Napiwotzki

The first planet detected in the WTS : an inflated hot-Jupiter in a 3.35 day orbit around a late F-star [ERRATUM]. (2014) M. Cappetta, R.P. Saglia, J. L. Birkby, J. Koppenhoefer, D.J. Pinfield, S.T. Hodgkin, P. Cruz, G. Kovacs, B. Sipocz, D. Barrado, B. Nefs, Y. V. Pavlenko, L. Fossati, C. del Burgo, E. L. Martin, I. Snellen, J. Barnes, D. A. Campbell, S. Catalan, M. C. Galvez-Ortiz, N. Goulding, C. Haswell, O. Ivanyuk, H.R.A. Jones, M. Kuznetsov, N. Lodieu, F. Marocco, D. Mislis, F. Murgas, R. Napiwotzki, E. Palle, D. Pollacco, L. Sarro Baro, E. Solano, P. Steele, H. Stoev, R. Tata and J. Zendejas

Ultraviolet-excess sources with a red/infrared counterpart : Low-mass companions, debris discs and QSO selection. (2014) K. Verbeek, Paul J. Groot, Simone Scaringi, Jorge Casares, Jesus M. Corral-Santana, Niall Deacon, J.E. Drew, B.T. Gänsicke, E. Gonzalez-Solares, R. Greimel, U. Heber, R. Napiwotzki, R.H. Ostensen, D. Steeghs, N.J. Wright and A. Zijlstra

A determination of the space density and birth rate of hydrogen-line (DA) white dwarfs in the Galactic plane, based on the UVEX survey. (2013) Kars Verbeek, Paul J. Groot, Gijs A. Nelemans, Simone Scaringi, R. Napiwotzki, J.E. Drew, D.T.H. Steeghs, Jorge Casares, J.M. Corral-Santana, Boris T. Gänsicke, E.A. González-Solares, Robert Greimel, Ulrich Heber, Mike J. Irwin, Christian Knigge, N.J. Wright and Albert Zijlstra

Spectroscopic follow-up of ultraviolet-excess objects selected from the UVEX survey. (2012) K. Verbeek, P.J. Groot, S. Scaringi, G. Nelemans, R. Napiwotzki, B. Spikings, J.E. Drew, R.H. Østensen, D. Steeghs, B.T. Gänsicke, J. Casares, J.M. Corral-Santana, R.L.M. Corradi, Niall Deacon, J.J. Drake, E. González-Solares, M.J. Irwin, R. Greimel, U. Heber and C. Knigge

The brightest pure-H ultracool white dwarf. (2012) S. Catalan, P. -E. Tremblay, D.J. Pinfield, Leigh Smith, Z. H. Zhang, R. Napiwotzki, F. Marocco, A. C. Day-Jones, J. Gomes, K.P. Forde, P.W. Lucas and H.R.A. Jones

MUCHFUSS - massive unseen companions to hot faint underluminous stars from SDSS. (2012) S. Geier, V. Schaffenroth, H. Hirsch, A. Tillich, U. Heber, P. F. L. Maxted, R. H. Ostensen, B. N. Barlow, S. J. O'Toole, T. Kupfer, T. Marsh, B. Gaensicke, R. Napiwotzki, O. Cordes, S. Mueller, L. Classen, E. Ziegerer and H. Drechsel

The AGB population of NGC 6822 : Distribution and the C/M ratio from JHK photometry. (2012) L. F. Sibbons, Sean G. Ryan, M-R.L. Cioni, M. Irwin and R. Napiwotzki

New short-period stellar pulsators at large Galactocentric distances. (2011) G. Ramsay, T. Barclay, R. Napiwotzki, T. Barclay, M. Cropper, P. Hakala and S. Potter

The magnetic and metallic degenerate G77-50. (2011) J. Farihi, P. Dufour, R. Napiwotzki and D. Koester

The VMC survey I. Strategy and first data. (2011) M-R.L. Cioni, G. Clementini, L. Girardi, R. Guandalini, M. Gullieuszik, B. Miszalski, M.I. Moretti, V. Ripepi, S. Rubele, G. Bagheri, K. Bekki, N.J.G. Cross, W.J.G. de Blok, R. de Grijs, J.P. Emerson, C.J. Evans, B. Gibson, E. Gonzales-Solares, M.A.T. Groenewegen, M.J. Irwin, V.D. Ivanov, J. Lewis, M. Marconi, J-B. Marquette, C. Mastropietro, B. Moore, R. Napiwotzki, T. Naylor, J.M. Oliveira, M. Read, E. Sutorius, J.T. van Loon, M.I. Wilkinson and P.R. Wood

A white dwarf companion to the relativistic pulsar PSR J1141-6545. (2011) J. Antoniadis, C. G. Bassa, N. Wex, M. Kramer and R. Napiwotzki

Binaries discovered by the MUCHFUSS project SDSS J08205+0008 - An eclipsing subdwarf B binary with brown dwarf companion. (2011) S. Geier, V. Schaffenroth, H. Drechsel, U. Heber, T. Kupfer, A. Tillich, R. Ostensen, K. Smolders, P. Degroote, P.F.L. Maxted, B.N. Barlow, B.T. Gansicke, T.R. Marsh and R. Napiwotzki

Binaries discovered by the SPY survey VI : Discovery of a low mass companion to the hot subluminous planetary nebula central star EGB5-a recently ejected common envelope? (2011) S. Geier, R. Napiwotzki, U. Heber and G. Nelemans

The Hyper-MUCHFUSS project : probing the Galactic halo with sdB stars. (2011) A. Tillich, U. Heber, S. Geier, H. Hirsch, P.F.L. Maxted, B.T. Gansicke, T.R. Marsh, R. Napiwotzki, R. Ostensen and R.D. Scholz

IPHAS extinction distances to planetary nebulae. (2011) C. Giammanco, S.E. Sale, R.L.M. Corradi, M.J. Barlow, K. Viironen, L. Sabin, M. Santander-Garcia, D.J. Frew, R. Greimel, B. Miszalski, S. Phillipps, A.A. Zijlstra, A. Mampaso, J.E. Drew, Q.A. Parker and R. Napiwotzki

Improved prospects for the detection of new Large Magellanic Cloud planetary nebulae. (2011) B. Miszalski, R. Napiwotzki, M-R.L. Cioni and J. Nie

The MUCHFUSS project - Searching for hot subdwarf binaries with massive unseen companions : survey, target selection and atmospheric parameters. (2011) S. Geier, H. Hirsch, A. Tillich, P.F.L. Maxted, S.J. Bentley, R. Ostensen, U. Heber, B.T. Gansicke, T.R. Marsh, R. Napiwotzki, B.N. Barlow and S. O'Toole

Massive unseen companions to hot faint underluminous stars from SDSS (MUCHFUSS) - Analysis of seven close subdwarf B binaries. (2011) S. Geier, P.F.L. Maxted, R. Napiwotzki, R. Ostensen, U. Heber, H. Hirsch, T. Kupfer, S. Muller, A. Tillich, B.N. Barlow, R. Oreiro, T.A. Ottosen, C. Copperwheat, B.T. Gansicke and T.R. Marsh

Binaries discovered by the SPY project: V. GD 687 – a massive double degenerate binary progenitor that will merge within a Hubble time. (2010) S. Geier, U. Heber, T. Kupfer and R. Napiwotzki

Hot subdwarf stars in close-up view. I. Rotational properties of subdwarf B stars in close binary systems and nature of their unseen companions. (2010) S. Geier, U. Heber, P. Podsiadlowski, H. Edelmann, R. Napiwotzki, T. Kupfer and S. Muller

The chemical composition of TS 01, the most oxygen-deficient planetary nebula AGB nucleosynthesis in a metal-poor binary star. (2010) G. Stasinska, C. Morisset, G. Tovmassian, T. Rauch, M.G. Richer, M. Pena, R. Szczerba, T. Decressin, C. Charbonnel, L. Yungelson, R. Napiwotzki, S. Simon-Diaz and L. Jamet

The double-degenerate nucleus of the planetary nebula TS 01: a close binary evolution showcase. (2010) G. Tovmassian, L. Yungelson, T. Rauch, V. Suleimanov, R. Napiwotzki, G. Stasinska, J. Tomsick, J. Wilms, C. Morisset, M. Pena and M.G. Richer

The orbital period of V458 Vulpeculae, a post-double common-envelope nova. (2010) P. Rodriguez-Gil, M. Santander-Garcia, C. Knigge, R.L.M. Corradi, B.T. Gansicke, M.J. Barlow, J. Drake, J.E. Drew, B. Miszalski, R. Napiwotzki, D. Steeghs, R. Wesson, A.A. Zijlstra, D.H. Jones, T. Liimets, T. Munoz-Darias, S. Pyrzas and M. Rubio-Diez

High resolution UVES/VLT spectra of white dwarfs observed for the ESO SN Ia Progenitor Survey III. DA white dwarfs. (2009) D. Koester, B. Voss, R. Napiwotzki, N. Christlieb, D. Homeier, T. Lisker, D. Reimers and U. Heber

Astronometry with the Hubble Space Telescope : trigonometric parallaxes of planetary nebula nuclei NGC 6853, NGC 7293, Abell 31 and DeHt 5. (2009) G.F. Benedict, B.E. McArthur, R. Napiwotzki, T.E. Harrison, H.C. Harris, E. Nelan, H.E. Bond, R.J. Patterson and R. Ciardullo

Central stars of planetary nebulae in SDSS and IPHAS. (2009) S. Weston, R. Napiwotzki and S.E. Sale

High spatial resolution Galactic 3D extinction mapping with IPHAS. (2009) S.E. Sale, J.E. Drew, Y.C. Unruh, M.J. Irwin, C. Knigge, S. Phillips, A.A. Zijlstra, B.T. Gansicke, R. Greimel, P. Groot, A. Mampaso, R.A.H. Morris, R. Napiwotzki, D. Steeghs and N.A. Walton

High-resolution optical spectroscopy of Praesepe white dwarfs. (2009) S.L. Casewell, P.D. Dobbie, R. Napiwotzki, M.R. Burleigh, M.A. Barstow and R.F. Jameson

RAT J1953+1859: a dwarf nova discovered through high amplitude QPOs in quiescence. (2009) G. Ramsay, P. Hakala, T. Barclay, P.J. Wheatley, G. Marshall, H. Lehto, R. Napiwotzki, G. Nelemans, S. Potter and I. Todd

Subdwarf B and O stars : which evolutionary pathways? (2009) R. Napiwotzki

The UV-excess survey of the northern galactic plane. (2009) P. Groot, K. Verbeek, R. Greimel, M.J. Irwin, E. Gonzalez-Solares, B.T. Gansicke, E. De Groot, J.E. Drew, R. Napiwotzki, S. Weston and Niall Deacon

The age of white dwarf companions. (2009) S. Weston and R. Napiwotzki

The galactic population of white dwarfs. (2009) R. Napiwotzki

A new detailed examination of white dwarfs in NGC 3532 and NGC 2287. (2009) P.D. Dobbie, R. Napiwotzki, M.R. Burleigh, K.A. Williams, R.G. Sharp, M.A. Barstow, S.L. Casewell and I. Hubeny

A survey for post-common-envelope binary stars using GALEX and SDSS photometry. (2009) P.F.L. Maxted, B.T. Gansicke, M.R. Burleigh, J. Southworth, T.R. Marsh, R. Napiwotzki, G. Nelemans and P.L. Wood

The B-type giant HD 271791 in the Galactic halo : Linking run-away stars to hyper-velocity stars. (2008) U. Heber, H. Edelmann, R. Napiwotzki, M. Altmann and R.D. Scholz

Discovery of a widely separated ultracool dwarf–white dwarf binary. (2008) A.C. Day-Jones, D.J. Pinfield, R. Napiwotzki, B. Burningham, J.S. Jenkins, H.R.A. Jones, S. Folkes, D. Weights and J.R.A. Clarke

LMC origin of the hyper-velocity star HE 0437-5439: Beyond the supermassive black hole paradigm. (2008) N. Przybilla, M.A. Nieva, U. Heber, M. Firnstein, K. Butler, R. Napiwotzki and H. Edelmann

A planetary nebula around Nova V458 Vulpeculae undergoing flash ionization. (2008) R. Wesson, M.J. Barlow, R.L.M. Corradi, J.E. Drew, P. Groot, C. Knigge, D. Steeghs, B.T. Gaensicke, R. Napiwotzki, P. Rodriguez-Gil, A.A. Zijlstra, M.F. Bode, J. Drake, D.J. Frew, E. Gonzalez-Solares, R. Greimel, M.J. Irwin, L. Morales-Rueda, G. Nelemans, Q.A. Parker and S.E. Sale

A debris disk around the central star of the Helix Nebula? (2007) K.Y.L. Su, Y-H. Chu, G. Rieke, P.J. Huggins, R. Gruendl, R. Napiwotzki, T. Rauch, W.B. Latter and K. Volk

3D kinematics of white dwarfs from the SPY project. II. (2006) E.M. Pauli, R. Napiwotzki, U. Heber, M. Altmann and M. Odenkirchen

Discovery of eleven new ZZ Ceti stars. (2006) B.G. Castanheira, S.O. Kepler, F. Mullally, D.E. Winget, D. Koester, B. Voss, S.J. Kleinman, A. Nitta, D.J. Eisenstein, R. Napiwotzki and D. Reimers

Discovery of seven ZZ Ceti stars using a new photometric selection method. (2006) B. Voss, D. Koester, R. Ostensen, S.O. Kepler, R. Napiwotzki, D. Homeier and D. Reimers

New Praesepe white dwarfs and the initial mass final mass relation. (2006) P.D. Dobbie, R. Napiwotzki, M.R. Burleigh, M.A. Barstow, D.D. Boyce, S.L. Casewell, R.F. Jameson, I. Hubeny and G. Fontaine

On near Chandrasekhar mass central stars of planetary nebulae. (2006) R. Napiwotzki

On the origin of the ultramassive white dwarf GD 50. (2006) P.D. Dobbie, R. Napiwotzki, N. Lodieu, M.R. Burleigh, M.A. Barstow and R.F. Jameson

RApid Temporal Survey (RATS) II. Follow up observations of four newly discovered short-period variables. (2006) G. Ramsay, R. Napiwotzki, P. Hakala and H. Lehto

Survival of a brown dwarf after engulfment by a red giant star. (2006) P.F.L. Maxted, R. Napiwotzki, P.D. Dobbie and M.R. Burleigh

Time-resolved observations of the short period CV SDSS J123813.73-033933.0. (2006) S.V. Zharikov, G. Tovmassian, R. Napiwotzki, R. Michel and V. Neustroev

A near-infrared spectroscopic detection of the brown dwarf in the post common envelope binary WD 0137-349. (2006) M.R. Burleigh, E. Hogan, P.D. Dobbie, R. Napiwotzki and P.F.L. Maxted

HS 0146 1847 - a DAZB white dwarf of very unusual composition. (2005) D. Koester, R. Napiwotzki, B. Voss, D. Homeier and D. Reimers

Rotation velocities of white dwarfs. III. DA stars with convective atmospheres. (2005) C. Karl, R. Napiwotzki, U. Heber, S. Dreizler, D. Koester and I.N. Reid

Six detached white-dwarf close binaries. (2005) L. Morales-Rueda, P.F.L. Maxted, G. Nelemans, C. Karl, R. Napiwotzki, C. Moran and T.R. Marsh

Metal traces in white dwarfs of the SPY (ESO Supernova Ia Progenitor Survey) sample. (2005) D. Koester, K. Rollenhagen, R. Napiwotzki, B. Voss, N. Christlieb, D. Homeier and D. Reimers

Hot subdwarfs from the ESO Supernova Ia Progenitor Survey. I. Atmospheric parameters and cool companions of sdB stars. (2005) T. Lisker, U. Heber, R. Napiwotzki, N. Christlieb, Z. Han, D. Homeier and D. Reimers

Binaries discovered by the SPY project IV. Five single-lined DA double white dwarfs. (2005) G. Nelemans, R. Napiwotzki, C. Karl, T.R. Marsh, B. Voss, G. Roelofs, R.G. Izzard, M. Montgomery, T. Reerink, N. Christlieb and D. Reimers

HE 0437-5439: an unbound hypervelocity main-sequence B-type star. (2005) H. Edelmann, R. Napiwotzki, U. Heber, N. Christlieb and D. Reimers

Rotation velocities of white dwarfs determined from the Ca II K line. (2005) L. Berger, D. Koester, R. Napiwotzki, I.N. Reid and B. Zuckerman

Two new ZZ Ceti pulsators from the HS and HE surveys. (2005) R. Silvotti, B. Voss, I. Bruni, D. Koester, D. Reimers, R. Napiwotzki and D. Homeier

Wolf-Rayet and O star runaway populations from supernovae. (2005) L.M. Dray, J.E. Dale, M.E. Beer, R. Napiwotzki and A.R. King

A near-IR spectrum of the DO white dwarf RE J0503-285. (2005) P.D. Dobbie, M.R. Burleigh, A. Levan, M.A. Barstow, R. Napiwotzki and I. Hubeny

A near-infrared spectroscopic search for very-low-mass cool companions to notable DA white dwarfs. (2005) P.D. Dobbie, M.R. Burleigh, A. Levan, M.A. Barstow, R. Napiwotzki, J.B. Holberg, I. Hubeny and S.B. Howell

A study of two post-common envelope binary systems. (2005) K.M. Exter, D.L. Pollacco, P.F.L. Maxted, R. Napiwotzki and S.A. Bell

A Close Binary Nucleus in the MOST Oxygen-Poor Planetary Nebula PN G135.9 55.9. (2004) G. Tovmassian, R. Napiwotzki, M.G. Richer, G. Stasinska, A.W. Fullerton and T. Rauch

Identification of neon in FUSE and VLT spectra of extremely hot hydrogen-deficient (pre-) white dwarfs. (2004) K. Werner, T. Rauch, E. Reiff, J. Kruk and R. Napiwotzki

Identification of a DO white dwarf and a PG 1159 star in the ESO SN Ia progenitor survey (SPY). (2004) K. Werner, T. Rauch, R. Napiwotzki, N. Christlieb, D. Reimers and C. Karl

Close binary EHB stars from SPY. (2004) R. Napiwotzki, C. Karl, T. Lisker, U. Heber, N. Christlieb, D. Reimers, G. Nelemans and D. Homeier

HS 2333 3927: A new sdB dM binary with a large reflection effect. (2004) U. Heber, H. Drechsel, R. Ostensen, C. Karl, R. Napiwotzki, M. Altmann, O. Cordes, J.E. Solheim, B. Voss, D. Koester and S. Folkes

Discovery of kilogauss magnetic fields in three DA white dwarfs. (2004) R. Aznar Cuadrado, S. Jordan, R. Napiwotzki, H.M. Schmid, S.K. Solanki and G. Mathys

FUSE Observations of EC14026 Stars. (2004) P. Chayer, G. Fontaine, M. Fontaine, R. Lamontagne, F. Wesemael, J. Dupuis, U. Heber, R. Napiwotzki and S. Moehler

HS 2333 + 3927: a new sdB binary with a large reflection effect. (2004) C. Karl, U. Heber, H. Drechsel, R. Napiwotzki, M. Altmann, R. Ostensen, S. Folkes, J.E. Solheim, O. Cordes, B. Voss and D. Koester

Praesepe and the seven white dwarfs. (2004) P.D. Dobbie, D.J. Pinfield, R. Napiwotzki, N.C. Hambly, M.R. Burleigh, M.A. Barstow, R.F. Jameson and I. Hubeny

Spectral types and masses of white dwarfs in globular clusters. (2004) S. Moehler, D. Koester, M. Zoccali, F.R. Ferraro, U. Heber, R. Napiwotzki and A. Renzini

Spectroscopic analysis of sdB stars from the ESO Supernova Ia Progenitor Survey. (2004) T. Lisker, U. Heber, R. Napiwotzki, N. Christlieb, Z. Han, D. Homeier and D. Reimers

A population model of the solar neighbourhood thin disc white dwarfs. (2004) K.P. Schroder, E.M. Pauli and R. Napiwotzki

Discovery of a helium-core white dwarf progenitor. (2003) U. Heber, H. Edelmann, T. Lisker and R. Napiwotzki

2MASS J0516288+260738: Discovery of the first eclipsing late K + Brown dwarf binary system. (2003) S.L. Schuh, G. Handler, H. Drechsel, P. Hauschildt, S. Dreizler, R. Medupe, C. Karl, R. Napiwotzki, S. Kim, B.G. Park, M. Wood, M. Paparo, B. Szeidl, G. Viraghalmy, D. Zsuffa, O. Hashimoto, K. Kinugasa, H. Taguchi, E. Kambe, E. Leibowitz, P. Ibbetson, Y. Lipkin, T. Nagel, E. Gohler and M.L. Pretorius

Binaries discovered by the SPY project. III. HE 2209-1444: A massive, short period double degenerate. (2003) C. Karl, R. Napiwotzki, G. Nelemans, N. Christlieb, D. Koester, U. Heber and D. Reimers

Heavy-element abundance patterns in hot DA white dwarfs. (2003) M.A. Barstow, S.A. Good, J.B. Holberg, I. Hubeny, N.P. Bannister, F.C. Bruhweiler, M.R. Burleigh and R. Napiwotzki

3D kinematics of white dwarfs from the SPY project. (2003) E.M. Pauli, R. Napiwotzki, M. Altmann, U. Heber, M. Odenkirchen and F. Kerber

Spectral analysis of sdB Stars from the Hamburg Quasar Survey. (2003) H. Edelmann, U. Heber, H.J. Hagen, S. Dreizler, R. Napiwotzki, D. Engels and M. Lemke

SPY - the ESO Supernovae type Ia Progenitor survey. (2003) R. Napiwotzki, N. Christlieb, H. Drechsel, H.J. Hagen, U. Heber, D. Homeier, C. Karl, D. Koester, B. Leibundgut, T.R. Marsh, S. Moehler, G. Nelemans, E.M. Pauli, D. Reimers, A. Renzini and L. Yungelson

Binaries discovered by the SPY project. II. HE 1414-0848: A double degenerate with a mass close to the Chandrasekhar limit. (2002) R. Napiwotzki, D. Koester, G. Nelemans, L. Yungelson, N. Christlieb, A. Renzini, D. Reimers, H. Drechsel and B. Leibundgut

Resolving subdwarf B stars in binaries by HST imaging. (2002) U. Heber, S. Moehler, R. Napiwotzki, P. Thejll and E. Green

FUSE observations of PG1342+444 : new insights into the nature of the hottest DA white dwarfs. (2002) M.A. Barstow, S.A. Good, J.B. Holberg, M.R. Burleigh, N.P. Bannister, I. Hubeny and R. Napiwotzki

HS 0705 6700: A new eclipsing sdB binary. (2001) H. Drechsel, U. Heber, R. Napiwotzki, R. Ostensen, J.E. Solheim, F. Johannessen, S.L. Schuh, J. Deetjen and S. Zola

High-resolution UVES/VLT spectra of white dwarfs observed for the ESO SN Ia progenitor survey (SPY). I. (2001) D. Koester, R. Napiwotzki, N. Christlieb, H. Drechsel, H.J. Hagen, U. Heber, D. Homeier, C. Karl, B. Leibundgut, S. Moehler, G. Nelemans, D. Reimers, E.M. Pauli, A. Renzini and L. Yungelson

Binaries discovered by the SPY project. I. HE 1047-0436: A subdwarf B white dwarf syste. (2001) R. Napiwotzki, H. Edelmann, U. Heber, C. Karl, H. Drechsel, E.M. Pauli and N. Christlieb

UITBOC 1574: A Very Distant Helium- poor Subdwarf O Star. (2001) M. Seibert, P. Chayer, G.R. Meurer, R. Saffer and R. Napiwotzki

Spectroscopic investigation of old planetaries- V. Distance scales. (2001) R. Napiwotzki

Far-ultraviolet spectroscopy of the hot DA white dwarf WD 2218 706 (DeHt5) with STIS. (2001) M.A. Barstow, N.P. Bannister, J.B. Holberg, I. Hubeny, F.C. Bruhweiler and R. Napiwotzki

Metal abundances of sdB stars. (2001) H. Edelmann, U. Heber and R. Napiwotzki

Search for progenitors of supernovae type Ia with SPY. (2001) R. Napiwotzki, N. Christlieb, H. Drechsel, H.J. Hagen, U. Heber, D. Homeier, C. Karl, D. Koester, B. Leibundgut, T.R. Marsh, S. Moehler, G. Nelemans, E.M. Pauli, D. Reimers, A. Renzini and L. Yungelson

Cool companions to hot white dwarfs. (2000) P.J. Green, B. Ali and R. Napiwotzki

First VLT spectra of white dwarfs in a globular cluster. (2000) S. Moehler, U. Heber, R. Napiwotzki, D. Koester and A. Renzini

A Comparative Study of the Mass Distribution of Extreme-Ultraviolet selected White Dwarfs. (1999) R. Napiwotzki, P.J. Green and R. Saffer

Masses and Other Parameters of the PostCommon Envelope Binary BE Ursae Majoris. (1999) D.H. Ferguson, J. Liebert, S. Haas, R. Napiwotzki and T.A. James

Optical spectroscopy of the candidate luminous white dwarf in the young Large Magellanic Cloud cluster NGC 1818. (1999) M.R. Burleigh, R. Saffer, G.F. Gilmore and R. Napiwotzki

Spectroscopic investigation of old planetaries. IV. Model atmosphere analysis. (1999) R. Napiwotzki

Abundances of UV bright stars in globular clusters. I. ROA 5701 in omega Centauri and Barnard 29 in M 13. (1998) S. Moehler, U. Heber, M. Lemke and R. Napiwotzki

Hot UV bright stars in globular clusters. (1998) S. Moehler, W. Landsmann and R. Napiwotzki

Temperature determination of the cool DO white dwarf HD 149499B from EUVE observations. (1997) S. Jordan, R. Napiwotzki, D. Koester and T. Rauch

Monograph

Extremely Faint Blue-tail Stars in Centauri. (2002) S. Moehler, R. Napiwotzki, A.V. Sweigart, S. Landsman and S. Dreizler

Heavy Elements in DA White Dwarfs. (2001) M.A. Barstow, M.R. Burleigh, N.P. Bannister, J.B. Holberg, I. Hubeny, F.C. Bruhweiler and R. Napiwotzki

Spectral Analysis of sdB Stars from the Hamburg ESO Survey. (2001) H. Edelmann, U. Heber, R. Napiwotzki, M. Lemke and N. Christlieb

Conference or Workshop Item

NLTE spectral analysis of helium-rich sdO stars from the southern HK survey. (1996) J.S. Drilling, R. Napiwotzki, S. Dreizler, U. Heber and T.C. Beers

Other

Anyone out there? Galactic halo post-AGB stars. (2010) S. Weston, R. Napiwotzki and S. Catalan

Search for the coolest white dwarfs in the Galaxy. (2010) S. Catalan, R. Napiwotzki, S.T. Hodgkin, D.J. Pinfield and D.C. Hornillos

Binary sdB Stars with Massive Compact Companions. (2008) S. Geier, C. Karl, H. Edelmann, U. Heber and R. Napiwotzki

Hypervelocity Stars: Young and Heavy or Old and Light? (2008) U. Heber, H. Hirsch, H. Edelmann, R. Napiwotzki, S. O'Toole, W. Brown and M. Altmann

Metal Abundances of Subdwarf B Stars from SPY - a Pattern Emerges. (2008) S. Geier, U. Heber and R. Napiwotzki

Model Spectra of Hot Subdwarfs for the Gaia Mission. (2008) Luke Hindson, R. Napiwotzki, U. Heber and M. Lemke

The Origin of Helium-Rich Subdwarf O Stars. (2008) R. Napiwotzki

Radial Velocity Variable sdO/Bs from SPY - Preliminary Orbits of Three New Short Period Binaries. (2008) S. Geier, U. Heber and R. Napiwotzki

Recycling Matter in the Universe. X-ray observations of SBS 1150+599A (PN G135.9+55.9). (2008) G. Tovmassian, J. Tomsick, R. Napiwotzki, L. Yungelson, M. Pena, G. Stasinska and M.G. Richer

3D-Kinematics of White Dwarfs from the SPY-Project. (2007) R. Richter, U. Heber and R. Napiwotzki

Binary White Dwarfs in the Supernova Ia Progenitor Survey. (2007) R. Napiwotzki, C. Karl, G. Nelemans, L. Yungelson, N. Christlieb, H. Drechsel, U. Heber, D. Homeier, D. Koester, B. Leibundgut, T.R. Marsh, S. Moehler, A. Renzini and D. Reimers

Discovery of the First Very Wide WD LD Binary System. (2007) A.C. Day-Jones, D.J. Pinfield, H.R.A. Jones, T.R. Kendall, R. Napiwotzki and J.S. Jenkins

Follow-up Observations of SPY White Dwarf + M-Dwarf Binaries. (2007) P.F.L. Maxted, R. Napiwotzki, T.R. Marsh, M.R. Burleigh, P.D. Dobbie, E. Hogan and G. Nelemans

The Fraction of DA White Dwarfs with Kilo-Gauss Magnetic Fields. (2007) S. Jordan, R. Aznar Cuadrado, R. Napiwotzki, H.M. Schmid and S.K. Solanki

The Origins of the Ultramassive White Dwarf GD50. (2007) P.D. Dobbie, R. Napiwotzki, N. Lodieu, M.R. Burleigh, M.A. Barstow and R.F. Jameson

Six New ZZ Ceti Stars from the SPY and the HQS Surveys. (2007) B. Voss, D. Koester, R. Ostensen, R. Napiwotzki, D. Homeier and D. Reimers

Spectroscopic Analysis of Subluminous B Stars in Binaries with Compact Companions. (2007) S. Geier, C. Karl, H. Edelmann, U. Heber and R. Napiwotzki

The Subdwarf B + White Dwarf Binary KPD 1930+2752, a Supernova Type Ia Progenitor Candidate. (2007) S. Geier, S. Nesslinger, U. Heber, N. Przybilla, R. Napiwotzki and R-P. Kudritzki

Testing Magnetic Braking: The X-ray Activity of M Dwarfs in Pre-Cataclysmic Variable Systems. (2007) K.R. Briggs, R. Napiwotzki, P.F.L. Maxted and P.J. Wheatley

White Dwarfs in the European Galactic Plane Surveys (EGAPS). (2007) L. Morales-Rueda, P. Groot, R. Napiwotzki and J.E. Drew

An object that defies stereotypes : X-ray observations of SBS 1150+599A - the binary nucleus of PN G135.9+55.9. (2007) G. Tovmassian, J. Tomsick, R. Napiwotzki, L. Yungelson, G. Stasinska, M. Pena and M.G. Richer

DAZ White Dwarfs in the SPY Sample. (2005) D. Koester, K. Rollenhagen, R. Napiwotzki, B. Voss, N. Christlieb, D. Homeier and D. Reimers

Identification of a DO White Dwarf and a PG1159 Star in the ESO SN Ia Progenitor Survey (SPY). (2005) K. Werner, T. Rauch, R. Napiwotzki, N. Christlieb, D. Reimers and C. Karl

Kilo-Gauss Magnetic Fields in Three DA White Dwarfs. (2005) R. Aznar Cuadrado, S. Jordan, R. Napiwotzki, H.M. Schmid, S.K. Solanki and G. Mathys

The Mass of the sdB Primary of the Binary HS 2333+3927. (2005) U. Heber, H. Drechsel, C. Karl, R. Ostensen, S. Folkes, R. Napiwotzki, M. Altmann, O. Cordes, J.E. Solheim, B. Voss and D. Koester

A Model of the Local WD Population. (2005) K.P. Schroder, R. Napiwotzki and E.M. Pauli

New Results from the Supernova Ia Progenitor Survey. (2005) R. Napiwotzki, C. Karl, G. Nelemans, L. Yungelson, N. Christlieb, H. Drechsel, U. Heber, D. Homeier, D. Koester, J. Kruk, B. Leibundgut, T.R. Marsh, S. Moehler, A. Renzini and D. Reimers

Rotation Velocities of DA White Dwarfs with Convective Atmospheres. (2005) C. Karl, U. Heber, R. Napiwotzki, S. Dreizler, D. Koester and I.N. Reid

Subdwarf B Binaries from the SPY Project. (2005) C. Karl, U. Heber and R. Napiwotzki

Subdwarf B Stars from the ESO Supernova Ia Progenitor Survey -- Observation versus Theory. (2005) T. Lisker, U. Heber, R. Napiwotzki, N. Christlieb, Z. Han, D. Homeier and D. Reimers

Subluminous O Stars from the ESO Supernova Progenitor Survey - Observation versus Theory. (2005) A. Stroeer, U. Heber, T. Lisker, R. Napiwotzki and S. Dreizler

Time-resolved Observations of the Short Period CV SDSS J123813.73-033933.0. (2005) S.V. Zharikov, G. Tovmassian, V. Neustroev, R. Michel and R. Napiwotzki

Double Degenerate and Progenitors of Supernovae Type Ia. (2004) R. Napiwotzki, L. Yungelson, G. Nelemans, T.R. Marsh, B. Leibundgut, A. Renzini, D. Homeier, D. Koester, S. Moehler, N. Christlieb, D. Reimers, H. Drechsel, U. Heber, C. Karl and E.M. Pauli

NLTE Spectral Analysis of Iron Group Elements in the Hot Subluminous O-star BD+28 4211. (2003) M. Ramspeck, S. Haas, R. Napiwotzki, U. Heber, J. Deetjen and S. Dreizler

Extremely faint blue-tail stars in ω Centauri. (2002) S. Moehler, R. Napiwotzki, A.V. Sweigart, S. Landsman and S. Dreizler

Heavy Elements in DA White Dwarfs. (2001) M.A. Barstow, M.R. Burleigh, N.P. Bannister, J.B. Holberg, I. Hubeny, F.C. Bruhweiler and R. Napiwotzki

Spectral Monitoring of HS 0209+0832 a DAB White Dwarf in the DB Gap. (2001) H. Edelmann, U. Heber and R. Napiwotzki

Spectral analysis of sdB Stars from the Hamburg ESO Survey. (2001) H. Edelmann, U. Heber, R. Napiwotzki, M. Lemke and N. Christlieb

How accurately do we know the parameters of hot DA white dwarfs. (1999) R. Napiwotzki, P.J. Green and R. Saffer

Spectral analysis of hot subluminous stars. (1999) U. Heber, H. Edelmann, M. Lemke, R. Napiwotzki and D. Engels

Spectral analysis of the binary sdB star Feige 36. (1999) H. Edelmann, U. Heber, R. Napiwotzki, I.N. Reid and R. Saffer

The planetary nebulae of PG 1159 stars - clues to their evolutionary history. (1996) R. Napiwotzki, S. Haas and D. Schonberner

Convective overshooting and the observed width of the main-sequence band. (1993) R. Napiwotzki, A. Rieschick, T. Blocker, D. Schonberner and V. Wenske

The blue straggler stars of galactic clusters. (1993) D. Schonberner and R. Napiwotzki