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arXiv:astro-ph/0504499 (astro-ph)
[Submitted on 22 Apr 2005]

Title:Correlation of Low z Lyman-alpha Absorbers with HI-selected Galaxies

Authors:Emma V. Ryan-Weber (IoA)
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Abstract: In this work, observational evidence for the connection between low column density Lyman-alpha absorbers and large-scale structure traced by gas-rich galaxies is investigated. The HI Parkes All Sky Survey (HIPASS) galaxy catalogue is cross-correlated with known low redshift, low column density Lyman-alpha absorbers from the literature. The absorber-galaxy cross-correlation function shows that on scales from 1 to 10 h^-1 Mpc, absorbers are imbedded in halos with masses similar to that of galaxy groups. This statistical evidence suggests that galaxy groups could be the dominant environment of low column density Lyman-alpha absorbers at z=0.
Comments: 3 pages, 1 figure, to appear in IAU 199 conf. proc.: "Probing Galaxies through Quasar Absorption Lines," eds. Williams, Shu, Menard
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0504499
  (or arXiv:astro-ph/0504499v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0504499
Related DOI: https://doi.org/10.1017/S1743921305003121

Submission history

From: Emma Ryan-Weber [view email]
[v1] Fri, 22 Apr 2005 13:36:00 UTC (24 KB)
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