Observational Constraints on Variable Chaplygin Gas

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dc.creatorGuo, Zong-Kuan
dc.creatorZhang, Yuan-Zhong
dc.date2005-09-27
dc.date.accessioned2026-07-07T06:19:31Z
dc.date.available2026-07-07T06:19:31Z
dc.descriptionWe investigate observational constraints on the variable Chaplygin gas model from the gold sample of type Ia supernova data and the recent measurements of the X-ray gas mass fractions in galaxy clusters. Combining these databases, we obtain a tight constraint on the two model parameters. Our results indicate that the original Chaplygin gas model is ruled out by the data at 99.7% confidence level.
dc.description9 pages, 5 figures, LaTeX2e
dc.identifierhttps://arxiv.org/abs/astro-ph/0509790
dc.identifierhttp://arxiv.org/abs/astro-ph/0509790
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/95064
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleObservational Constraints on Variable Chaplygin Gas
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