Comparisons of u ‐, g ‐, r ‐, i ‐, and z ‐band luminosity distributions between galaxy members of compact groups and isolated galaxies

Abstract

Comparisons of u-, g-, r-, i-, and z-band luminosity distributions between galaxy members of compact groups and isolated galaxies Key words galaxies: fundamental parameters -galaxies: statisticsTo investigate the environmental dependence of u-, g-, r-, i-, and z-band luminosities, we perform comparative studies of luminosity distributions between galaxy members of compact groups (CGs) and isolated galaxies. It is found that for the r, i, and z bands isolated galaxies have a higher proportion of faint galaxies and a lower proportion of luminous galaxies than galaxy members of CGs, but for the u band an opposite trend is observed. The correlation between the g-band luminosity and the environment has different trends in different luminosity regions.

Luminosity-Environment Relation in the Lowz Sample of the SDSS-III

“…As it was shown in Table 1 of Deng (2012), in the apparent-magnitude limited Main galaxy sample of the SDSS, the KS probability of different luminosities in subsamples with a redshift bin size of ∆z = 0.01 is fairly small in the redshift region 0.02 ≤ z ≤ 0.10, except KS probability of g-band luminosity. Deng & Zou (2011) also found that KS probability of g-band luminosity is much higher than that of other band luminosities, and argued that this may be due to having different trends in different luminosity regions. Overall, the result of Deng (2012) showed that the environmental dependence of galaxy luminosities is very strong in the redshift region 0.02 ≤ z ≤ 0.10.…”

“…The luminosity-environment relation of galaxies has been the subject widely focused on Hamilton 1988;White et al 1988;Loveday et al 1995;Guzzo et al 1997;Willmer et al 1998;Norberg et al 2001Norberg et al , 2002Zehavi et al 2002;Blanton et al 2003Blanton et al , 2005Hogg et al 2003;Berlind et al 2005;Zandivarez et al 2006;Park et al 1994Park et al , 2007Deng et al 2007aDeng et al , 2008aDeng et al ,b, 2009aDeng et al , 2012aDeng 2012;Deng & Zou 2011, 2014a. In the local Universe, many authors found that galaxy luminosity has a strong environmental dependence: luminous galaxies show a tendency to reside in dense environments, while faint galaxies tend to reside in low density regions (e.g., Park et al 1994;Norberg et al 2001;Blanton et al 2003Blanton et al , 2005Zandivarez et al 2006;Deng et al 2007aDeng et al , 2008aDeng et al ,b, 2009a.…”

“…However, the luminosity-environment relation is a complicated one. Applying different approaches, Deng & Zou (2011), Deng (2012) and Deng et al (2012a,b) have shown that in the Main galaxy sample (Strauss et al 2002) of the Sloan Digital Sky Survey (SDSS), the environmental dependence of galaxy luminosities does not follow a single trend for different bands, nor does it follow the same trend in different luminosity regions (e.g., Norberg et al 2001;Deng et al 2009a). For the u-band, an opposite trend is observed: the galaxies luminous in the u-band exist preferentially in low density regions, while the galaxies faint in the u-band are located preferentially in high density regions.…”

Comparisons of the galaxy age, stellar velocity dispersion and K-band luminosity distributions between grouped galaxies and isolated ones

“…Applying the local three-dimensional galaxy density (Galaxies Mpc −3 ) that defined as the number of galaxies (N = 5) within the three-dimensional distance to the 5th nearest galaxy to the volume of the sphere with the radius of this distance, in two volume-limited Main galaxy (Strauss et al 2002) samples of the SDSS DR10 (Ahn et al 2014), Deng (2014) found that old galaxies exist preferentially in the dense regions, while young galaxies are located preferentially in low density regions. Deng (2015aDeng ( , 2015b) also reported that stellar velocity dispersion and K-band luminosity of Main galaxies shows substantial correlation with the local environment, respectively.…”