Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-07-30
Astronomy and Astrophysics
Astrophysics
38 pages, 9 figures, 2 tables. Accepted for publication on Astronomical Journal
Scientific paper
10.1086/424862
We use a sample of 55 groups and 6 clusters of galaxies ranging in mass from 7 x 10^11 Msun to 1.5 x 10^15 Msun to examine the correlation of the Ks-band luminosity with mass discovered by Lin et al. (2003). We use the 2MASS catalog and published redshifts to construct complete magnitude limited redshift surveys of the groups. From these surveys we explore the IR photometric properties of groups members including their IR color distribution and luminosity function. Although we find no significant difference between the group Ks luminosity function and the general field, there is a difference between the color distribution of luminous group members and their counterparts (generally background) in the field. There is a significant population of luminous galaxies with H-Ks > 0.35 which are rarely, if ever, members of the groups in our sample. The most luminous galaxies which populate the groups have a very narrow range of IR color. Over the entire mass range covered by our sample, the Ks luminosity increases with mass as L ~ M^(0.64 +/- 0.06) implying that the mass-to-light ratio in the Ks-band increases with mass. The agreement between this result and earlier investigations of essentially non-overlapping sets of systems shows that this window in galaxy formation and evolution is insensitive to the selection of the systems and to the details of the mass and luminosity computations.
Boschin Walter
Geller Margaret J.
Mahdavi Andisheh
Ramella Massimo
Rines Ken
No associations
LandOfFree
K-band Properties of Well-Sampled Groups of Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with K-band Properties of Well-Sampled Groups of Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and K-band Properties of Well-Sampled Groups of Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-503492