Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008chjaa...8..503l&link_type=abstract
Chinese Journal of Astronomy and Astrophysics, Volume 8, Issue 5, pp. 503-521 (2008).
Astronomy and Astrophysics
Astrophysics
Scientific paper
Two-dimensional bulge/disk light decomposition with GIM2D in both the r- and g-bands has been applied to a sample of 129 early-type galaxies brighter than 13.5 magnitude in the r-band, selected from the Sloan Digital Sky Survey Data Release 2. Intensity-weighted Fourier coefficient langlea4/arangle was also derived for each sample galaxy. Our analysis shows that there are correlations between bulge-to-total light ratio (B/T) with bulge Sérsic index nB and between bulge and disk scale sizes. Isophotal shape parameter langlea4/arangle is not correlated with B/T and nB. Both bulge and disk components satisfy a color-magnitude relation. The κ space Fundamental Plane analysis shows that galaxies with larger B/T tend to lie tighter and closer to the line of κ1 + κ2 = 8 (the so-called ``zone of avoidance'') than the galaxies with smaller B/T. It indicates that existence of the disk component may lead to scatter of the distribution on the Fundamental Plane. Our analysis also shows that κ1 + κ2 correlates with (g-r) color and B/T, but does not correlate with langlea4/arangle for early-type galaxies. The fitted parameters and other retrieved parameters used in this paper for all sample galaxies are available online.
Deng Zu-Gang
Liu Feng-Shan
Wu Haibin
Xia Xiao-Yang
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