Galaxy evolution explorer ultraviolet color-magnitude relations and evidence of recent star formation in early-type galaxies
We have used the Galaxy Evolution Explorer UV photometric data to construct a first near-UV (NUV) color-magnitude relation (CMR) for the galaxies preclassified as early-type by Sloan Digital Sky Survey studies. The NUV CMR is a powerful tool for tracking the recent star formation history in early-type galaxies, owing to its high sensitivity to the presence of young stellar populations. Our NUV CMR for UV-weak galaxies shows a well-defined slope and thus will be useful for interpreting the rest-frame NUV data of distant galaxies and studying their star formation history. Compared to optical CMRs, the NUV CMR shows a substantially larger scatter, which we interpret as evidence of recent star formation activities. Roughly 15% of the recent epoch (z <0.13) bright [M(r) <-22] early-type galaxies show a sign of recent ≤1 Gyr) star formation at the 1%-2% level (lower limit) in mass compared to the total stellar mass. This implies that low-level residual star formation was common during the last few billion years even in bright early-type galaxies.
Item Type | Article |
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Date Deposited | 27 Jul 2024 01:32 |
Last Modified | 27 Jul 2024 01:32 |
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Read more research from the creator(s):
- Yi, S.K.
- Yoon, S.-J.
- Lee, Y.-W.
- Ree, C.H.
- Sohn, Y.-J.
- Rey, S.-C.
- Rhee, J.
- Byun, Y.-I.
- Kim, S.-W.
- Kaviraj, S.
- Deharveng, J.-M.
- Boselli, A.
- Donas, J.
- Malina, R.
- Milliard, B.
- Rich, R.M.
- Salim, S.
- Friedman, P.G.
- Martin, D.C.
- Morrissey, P.
- Small, T.
- Barlow, T.
- Forster, K.
- Wyder, T.K.
- Lee, J.-W.
- Bianchi, L.
- Heckman, T.M.
- Szalay, A.S.
- Jee, M.J.
- Jelinsky, P.
- Siegmund, O.
- Welsh, B.
- Madore, B.F.
- Neff, S.
- Schiminovich, D.
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- Centre for Astrophysics Research
- School of Physics, Engineering & Computer Science
- Department of Physics, Astronomy and Mathematics
- Centre of Data Innovation Research
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