Properties of a Chemically Enriched Lya Absorption System at z=0.167 and Implications for the Total Baryons in Extended Gaseous Envelopes Around Galaxies

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dc.creatorChen, Hsiao-Wen
dc.creatorProchaska, Jason X.
dc.creatorLanzetta, Kenneth M.
dc.date2001-08-03
dc.date.accessioned2026-07-07T01:59:33Z
dc.date.available2026-07-07T01:59:33Z
dc.descriptionWe present a detailed analysis of the chemical abundances, ionization state, and origin of a partial Lyman limit system (N(HI) ~ 10^{16} cm^{-2}) at low redshift (z=0.167 towards PKS0405-1219). We also present the first estimate of the total baryons in extended gaseous envelopes around galaxies based on a simple photoionization model for the Lya absorbers. We find that extended gaseous envelopes can explain between 5--20% of the total baryons predicted by the big bang nucleosynthesis model.
dc.description10 pages, 4 figures, to appear in ``Extragalactic Gas at Low Redshift'', ed. J. Mulchaey and J. Stocke, ASP Conf. Serie
dc.identifierhttps://arxiv.org/abs/astro-ph/0108068
dc.identifierhttp://arxiv.org/abs/astro-ph/0108068
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/3157
dc.subjectAstrophysics
dc.titleProperties of a Chemically Enriched Lya Absorption System at z=0.167 and Implications for the Total Baryons in Extended Gaseous Envelopes Around Galaxies
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