منابع مشابه
zCOSMOS 10k-bright spectroscopic sample Exploring mass and environment dependence in early-type galaxies
Aims. We present the analysis of the U − V rest-frame color distribution and some spectral features as a function of mass and environment for a sample of early-type galaxies up to z = 1 extracted from the zCOSMOS spectroscopic survey. This analysis is used to place constraints on the relative importance of these two properties in controlling galaxy evolution. Methods. We used the zCOSMOS 10k-br...
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We present a galaxy group catalogue spanning the redshift range 0.1 . z . 1 in the ∼ 1.7 deg COSMOS field, based on the first ∼ 10, 000 zCOSMOS spectra. The performance of both the Friendsof-Friends (FOF) and Voronoi-Delaunay-Method (VDM) approaches to group identification has been extensively explored and compared using realistic mock catalogues. We find that the performance improves substanti...
متن کاملThe 10k Zcosmos: Morphological Transformation of Galaxies in the Group
We study the evolution of galaxies inside and outside of the group environment since z = 1 using a large well defined set of groups and galaxies from the zCOSMOS-bright redshift survey in the COSMOS field. The fraction of galaxies with early-type morphologies increases monotonically with MB luminosity and stellar mass and with cosmic epoch. It is higher in the groups than elsewhere, especially ...
متن کاملSpectroscopic study of bright photometric candidates ⋆
We present medium-resolution spectroscopy of a sample of stars in the second Galactic quadrant selected from the literature because their colours suggest that they are moderately-reddened early-type stars at very large distances. From the derived spectral types and observed colours, we calculate distances to all these objects. For a sizable fraction of our sample, we find distances well in exce...
متن کاملThe IRAS Revised Bright Galaxy Sample ( RBGS )
IRAS flux densities, redshifts, and infrared luminosities are reported for all sources identified in the IRAS Revised Bright Galaxy Sample (RBGS), a complete flux-limited survey of all extragalactic objects with total 60μm flux density greater than 5.24 Jy, covering the entire sky surveyed by IRAS at Galactic latitude |b| > 5. The RBGS includes 629 objects, with a median (mean) sample redshift ...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2010
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201014044