Line-of-Sight Anisotropies within X-ray Luminous Cluster Samples

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dc.creatorMiller, C. J.
dc.creatorLedlow, M. J.
dc.creatorBatuski, D. J.
dc.date1999-06-26
dc.date.accessioned2026-07-07T02:32:11Z
dc.date.available2026-07-07T02:32:11Z
dc.descriptionWe present the results from two-point spatial correlation analyses on X-ray confirmed northern Abell clusters. The cluster samples are subsets of a volume-limited ROSAT All-Sky Survey study of 294 Abell clusters of which 240 are X-ray luminous. We examined magnitude- and volume-complete samples for differences according to richness and X-ray luminosity. For R>=1 clusters, we find r_0 = 22h^-1Mpc and gamma = -1.7, which is consistent with previous analyses of visually selected clusters. We also find no indications of line-of-sight anisotropies. For R >= 0 clusters, we find r_0= 17.5h^-1Mpc which is considerably lower than recent determinations of r_0 for similar X-ray bright cluster samples (e.g. the XBACs and the RASS1 clusters). All of the R>=0 X-ray confirmed samples, including the XBACs and RASS1 clusters, show line-of-sight anisotropies. Since X-ray emissions confirm a cluster's reality, we conclude that these anisotropies are not the result of spuriously selected clusters. We also examine the Abell clusters for the depedence of r_0 and gamma on X-ray luminosity, and find no evidence for r_0 to grow with increasing X-ray luminosity thresholds. This is contrary to similar L_x vs. r_0 analyses of the RASS1 and XBACs cluster samples. We describe selection effects within the flux-limited XBACs and RASS1 samples and suggest how they can affect both the size of r_0 and its dependence on L_x.
dc.description20 pages, 7 figures, LaTeX, submitted for publication in MNRAS
dc.identifierhttps://arxiv.org/abs/astro-ph/9906423
dc.identifierhttp://arxiv.org/abs/astro-ph/9906423
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/14418
dc.subjectAstrophysics
dc.titleLine-of-Sight Anisotropies within X-ray Luminous Cluster Samples
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