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29 March 2024
 
  » arxiv » astro-ph/0411356

 Article overview


Systematics of the Ultraviolet Rising flux in a GALEX/SDSS sample of Early-type Galaxies
R. M. Rich ; S. Salim ; J. Brinchmann ; S. Charlot ; M. Seibert ; G. Kauffmann ; Y-W. Lee ; S.K. Yi ; T. A. Barlow ; L. Bianchi ; J. Donas ; K. Forster ; P.G. Friedman ; T.M. Heckman ; P.N.Jelinsky ; B.F. Madore ; R.F. Malina ; D.C. Martin ; B.Milliard ; P.Morrissey ; S. G. Neff ; D. Schiminovich ; O.H.W. Siegmund ; T. Small ; A.S.Szalay ; B.Y. Welsh ; T.K.Wyder ;
Date 12 Nov 2004
Journal Astrophys.J. 619 (2005) L107-L110
Subject astro-ph
AbstractWe present ultraviolet photometry for a sample of morphologically early-type galaxies selected by matching the Sloan Digital Sky Survey Data Release 1 with the GALEX Medium and All-sky Imaging Surveys. We obtain a working sample of 1032 early-type galaxies with GALEX FUV detections, SDSS spectroscopy, and $z<0.2$. Using the SDSS spectra to identify galaxies with even weak star formation or evidence of AGN, and further removing galaxies with any evidence of non early-type morphology, we derive a final sample of 172 red quiescent early-type galaxies. We find that the $FUV-r$ color has a full range of 5 mag. Plotting against the $FUV-r$ color the metallicity sensitive Lick $ m Mg_2$ and D4000 indices, and the stellar velocity dispersion, we find no correlation between our measurement of UV rising flux, and any parameter sensitive to metallicity.
Source arXiv, astro-ph/0411356
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