Cold gas in elliptical galaxies

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dc.creatorGeorgakakis, A.
dc.creatorHopkins, A. M.
dc.creatorCaulton, A.
dc.creatorWiklind, T.
dc.creatorTerlevich, A. I.
dc.creatorForbes, D. A.
dc.date2001-05-24
dc.date.accessioned2026-07-07T12:16:21Z
dc.date.available2026-07-07T12:16:21Z
dc.descriptionWe explore the evolution of the cold gas (molecular and neutral hydrogen) of elliptical galaxies and merger remnants ordered into a time sequence on the basis of spectroscopic age estimates. We find that the fraction of cold gas in early merger remnants decreases significantly for ~1-2 Gyr, but subsequent evolution toward evolved elliptical systems sees very little change. This trend can be attributed to an initial gas depletion by strong star-formation which subsequently declines to quiescent rates. This explanation is consistent with the merger picture for the formation of elliptical galaxies. We also explore the relation between HI-to-H2 mass ratio and spectroscopic galaxy age, but find no evidence for a statistically significant trend. This suggests little net HI to H2 conversion for the systems in the present sample.
dc.description11 pages, 6 figures, accepted for publication by MNRAS
dc.identifierhttps://arxiv.org/abs/astro-ph/0105435
dc.identifierhttp://arxiv.org/abs/astro-ph/0105435
dc.identifierMon.Not.Roy.Astron.Soc.326:1431,2001
dc.identifierdoi:10.1111/j.1365-2966.2001.04677.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/211772
dc.subjectAstrophysics
dc.titleCold gas in elliptical galaxies
dc.typetext

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