Comparing Low Surface Brightness Galaxies and Lyα Absorbers

1996/09/04 by Suzanne M. Linder, Linder, Suzanne M.
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #Black Holes and Theoretical Physics #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Scientific Research and Discoveries #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/9609033

4 pages, Latex, to appear in the proceedings of the Young Galaxies and QSO Absorption-line Systems conference held in Santos, Brazil in April, 1996

arxiv created 1996/09/04 · openalex publication_date 1996/09/04 · arxiv updated 2009/12/01 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28

Abstract

I explore the hypothesis that Lyα absorption at low redshift is caused by the outer regions of extended galaxy disks, including those of dwarf and low surface brightness galaxies. McGaugh (1996) has shown that the distribution of central galaxy surface brightnesses may be flat to 25 B mag arcsec^-2 or fainter. A population of galaxies is simulated based upon observed distributions. The low-redshift neutral column density distribution is predicted, and an estimate is made for the number density of disk galaxies required to explain all absorbers. Results relating to galaxy luminosities and impact parameters are discussed.

Related

• Simulations of LyαAbsorption from Low Surface Brightness Galaxies
• The Identification of LyαAbsorbers at Low Redshift
• The HI Content and Extent of Low Surface Brightness Galaxies - Could LSB Galaxies be Responsible for Damped Ly-alpha Absorption?
• The Evolution of Ly-alpha Absorbing Galaxies
• Observationnal constraints on the nature of the low redshift Lyman-alpha absorbers