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Author Suzanne, Absorber Identification ♦ Linder, Suzanne M.
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Galaxy Selection ♦ Low Redshift ♦ Lyff Absorber ♦ Surface Brightness ♦ Sight Throug ♦ Particular Absorber ♦ Quasar Line ♦ Large Fraction ♦ Correct Galaxy ♦ Lyff Absorber Count ♦ Unidentified Galaxy ♦ Absorber-galaxy Model ♦ Luminous Galaxy ♦ Impact Parameter ♦ Galaxy Absorption Cross Section ♦ Extended Galaxy
Abstract . While it is possible to explain Lyff absorber counts at low redshift using gas which is associated with moderately extended galaxies [1], absorbers are often observed to be associated with galaxies at larger impact parameters from quasar lines of sight than are expected from calculated galaxy absorption cross sections in such absorber-galaxy models. However, a large fraction of absorbers is expected to arise in lines sight through galaxies which are low in luminosity and/or surface brightness, so that they are unlikely to be detected in surveys for galaxies close to quasar lines of sight. Given that it is impossible to be certain that any particular absorber has been matched to the correct galaxy, I show that it is possible to simulate plots of absorption covering factors around luminous galaxies which resemble observed plots by assuming that absorption often originates in unidentified galaxies. Supposing that Lyff absorbers at low redshift generally arise from lines of sight throug...
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study