Constraining $H_0$ from Sunyaev-Zel'dovich effect, Galaxy Clusters X-ray data, and Baryon Oscillations

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dc.creatorCunha, J. V.
dc.creatorMarassi, L.
dc.creatorLima, J. A. S.
dc.date2006-11-30
dc.date.accessioned2026-07-07T11:00:20Z
dc.date.available2026-07-07T11:00:20Z
dc.descriptionEstimates of $H_0$ from Sunyaev-Zel'dovich effect (SZE) and X-ray surface brightness of galaxy clusters depends on the underlying cosmology. In the current $Λ$CDM flat cosmology, a possible technique to broke the degenerescency on the mass density parameter ($Ω_{m}$) is to apply a joint analysis involving the baryon acoustic oscillations (BAO). By adopting this technique to the ($H_0, Ω_m$) parameter space, we obtain new constraints on the Hubble constant $H_0$ from BAO signature as given by the Sloan Digital Sky Survey (SDSS) catalog. Our analysis based on the SZE/X-ray data for a sample of 25 clusters yields $H_0= 74^{+4}_{-3.5}$ km s$^{-1}$ Mpc$^{-1}$ ($1σ$, neglecting systematic uncertainties). This result is in good agreement with independent studies from the {\it{Hubble Space Telescope}} key project and the recent estimates of WMAP, thereby suggesting that the combination of these three independent phenomena provides an interesting method to constrain the Hubble constant.
dc.description15 pages, 4 figures, 1 table
dc.identifierhttps://arxiv.org/abs/astro-ph/0611934
dc.identifierhttp://arxiv.org/abs/astro-ph/0611934
dc.identifierMon.Not.Roy.Astron.Soc.Lett.379:L1-L5,2007
dc.identifierdoi:10.1111/j.1745-3933.2007.00322.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/187658
dc.subjectAstrophysics
dc.titleConstraining $H_0$ from Sunyaev-Zel'dovich effect, Galaxy Clusters X-ray data, and Baryon Oscillations
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