منابع مشابه
Gravitational Lensing and the Redshift Distribution of B> 25 Galaxies
In addition to the determination of the mass distribution of lenses (see P. Schneider, this conference), strong and weak lensing can also be powerfull tools to analyse the redshift distribution of faint galaxies. In this review, I summarize the present status of redshifts of galaxies beyond B = 25 as they are inferred by spectroscopy of magnified galaxies, lensing inversion and magnification bias.
متن کاملDeep Counts of Submillimeter Galaxies
We present the counts of luminous submillimeter (sub-mm) galaxies from an analysis of our completed survey of the distant Universe seen through lensing clusters. This survey uses massive cluster lenses with well-constrained mass models to obtain a magnified view of the background sky. This both increases the sensitivity of our sub-mm maps and reduces the effects of source confusion. Accurate le...
متن کاملMorphological Number Counts and Redshift Distributions to I = 25 from the Hubble Deep Fields: Constraints on Cosmological Models from Early Type Galaxies
We combine magnitude and photometric redshift data on galaxies in the Hubble Deep Fields with morphological classifications in order to separate out the distributions for early type galaxies. The updated morphological galaxy number counts down to I = 25 and the corresponding redshift distributions are used as joint constraints on cosmological models, in particular on the values of the density p...
متن کاملMorphological Number Counts of Galaxies in the Hubble Deep Field South
We present a study of photometric properties of the galaxies in the Hubble Deep Field South (HDFS) based on the released WFPC2 images obtained with the Hubble Space Telescope (HST). We have classified about 340 galaxies with I < 26 mag in the HDFS as well as about 400 galaxies in the Hubble Deep Field North (HDFN) using the visual classification supplemented by inspection of the surface brightn...
متن کاملModelling the number counts of early-type galaxies by pure luminosity evolution
In this paper, we explore the plausible luminosity evolution of early-type galaxies in different cosmological models by constructing a set of pure luminosity evolution (PLE) models via the choices of the star formation rate (SFR) parameters and formation redshift zf of galaxies, with the observational constraints derived from the Hubble Space Telescope (HST) morphological number counts for elli...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1980
ISSN: 0074-1809
DOI: 10.1017/s0074180900068261