SIMBAD references

2008MNRAS.385.2097R - Mon. Not. R. Astron. Soc., 385, 2097-2106 (2008/April-3)

Near ultraviolet-infrared colours of red-sequence galaxies in local clusters.

RAWLE T.D., SMITH R.J., LUCEY J.R., HUDSON M.J. and WEGNER G.A.

Abstract (from CDS):

We present GALEX near-ultraviolet (NUV) and Two-Micron All-Sky Survey J-band photometry for red-sequence galaxies in local clusters. We define quiescent samples according to a strict emission threshold, removing galaxies with very recent star formation. We analyse the NUV-J colour-magnitude relation (CMR) and find that the intrinsic scatter is an order of magnitude larger than for the analogous optical CMR (∼0.35 rather than 0.05 mag), in agreement with previous studies. Comparing the NUV-J colours with spectroscopically derived stellar population parameters, we find a strong (>5.5σ) correlation with metallicity, only a marginal trend with age, and no correlation with the α/Fe ratio. We explore the origin of the large scatter and conclude that neither aperture effects nor the UV upturn phenomenon contribute significantly. We show that the scatter could be attributed to simple `frosting' by either a young or a low-metallicity subpopulation.

Abstract Copyright: ©2008 The Authors. Journal compilation © 2008 RAS

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: stellar content - ultraviolet: galaxies

VizieR on-line data: <Available at CDS (J/MNRAS/385/2097): table3.dat table4.dat>

Simbad objects: 1047

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2019.12.06-19:05:17

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