Chandra X-ray observations of the 3C295 cluster core

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dc.creatorAllen, S. W.
dc.creatorTaylor, G. B.
dc.creatorNulsen, P. E. J.
dc.creatorJohnstone, R. M.
dc.creatorDavid, L. P.
dc.creatorEttori, S.
dc.creatorFabian, A. C.
dc.creatorForman, W.
dc.creatorJones, C.
dc.creatorMcNamara, B.
dc.date2001-01-10
dc.date.accessioned2026-07-07T10:47:17Z
dc.date.available2026-07-07T10:47:17Z
dc.descriptionWe examine the properties of the X-ray gas in the central regions of the distant (z=0.46), X-ray luminous cluster of galaxies surrounding the powerful radio source 3C 295, using observations made with the Chandra Observatory. Between radii of 50-500 kpc, the cluster gas is approximately isothermal with an emission-weighted temperature, kT ~5 keV. Within the central 50 kpc radius this value drops to kT ~3.7 keV. The spectral and imaging Chandra data indicate the presence of a cooling flow within the central 50 kpc radius of the cluster, with a mass deposition rate of approximately 280 solar masses per year. We estimate an age for the cooling flow of 1-2 Gyr, which is approximately one thousand times older than the central radio source. We find no evidence in the X-ray spectra or images for significant heating of the X-ray gas by the radio source. We report the detection of an edge-like absorption feature in the spectrum for the central 50 kpc region, which may be due to oxygen-enriched dust grains. The implied mass in metals seen in absorption could have been accumulated by the cooling flow over its lifetime. Combining the results on the X-ray gas density profile with radio measurements of the Faraday rotation measure in 3C295, we estimate the magnetic field strength in the region of the cluster core to be B ~12 \muG.
dc.description27 pages, 16 figs, 5 tables. Accepted for publication in MNRAS
dc.identifierhttps://arxiv.org/abs/astro-ph/0101162
dc.identifierhttp://arxiv.org/abs/astro-ph/0101162
dc.identifierMon.Not.Roy.Astron.Soc.324:842,2001
dc.identifierdoi:10.1046/j.1365-8711.2001.04315.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/183484
dc.subjectAstrophysics
dc.titleChandra X-ray observations of the 3C295 cluster core
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