首页|Bar Presence in Local Galaxies:Dependence on Morphology in Field Galaxies
Bar Presence in Local Galaxies:Dependence on Morphology in Field Galaxies
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万方数据
维普
We analyzed the fractions of barred galaxies in the local Universe using a volume-limited sample of galaxies from the Sloan Digital Sky Survey Data Release 3.We examined 116 field galaxies with redshifts between 0.0207 and 0.030,using r and z-band images.Overall,the bar fraction was 26％in the r-band and 19％in the z-band.For distinct morphological groups,barred spiral galaxies had fractions of 33％in the r-band and 22％in the z-band,while barred lenticular galaxies had 25％in the r-band and 12％in the z-band.We observed that the bar fraction in spiral galaxies increases for stellar masses log(M*/M☉)＞10.5 and for galaxies with red colors(u-r)＞2.0.Additionally,most barred galaxies have a bulge-to-total ratio B/T≤ 0.2.Our results indicate that the bar fraction is more dependent on internal morphology than on the galaxy environment.
万方数据
维普
