1995/10/09 by Ana Campos, Campos, Ana · 2 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9510051
7 pages, uuencoded compressed postscript file uncluding text and 7 figures. Proc. ``International School of Physics Enrico Fermi'', Course CXXXII: Dark Matter in the Universe, Varenna 1995, eds.: S. Bonometto, J. Primack, A. Provenzale, IOP, to appear
arxiv created 1995/10/09 · openalex publication_date 1995/10/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In these Lectures Notes I re-visit the problem of the deep number counts as a viable method to (1) study the evolution of the galaxy population in the past and (2) determine the value of the deceleration parameter q0. After a brief description of the basic concepts needed to model the counts, we show that simple luminosity evolution models which incorporate dust are able to provide reasonable fits to both the deep counts and the redshift distribution of faint field galaxies if q0=0.05. In order to fit the counts in a \it closed (q0=0.5) Universe, we include a population of fading dwarfs, more numerous in the past, based on current ideas to understand the nature of dwarf galaxies.