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Title:
X-ray active galactic nuclei in the core of the Perseus cluster
Authors:
Santra, S.; Sanders, J. S.; Fabian, A. C.
Affiliation:
AA(Institute of Astronomy, Madingley Road, Cambridge CB3 0HA; ), AB(Institute of Astronomy, Madingley Road, Cambridge CB3 0HA; ), AC(Institute of Astronomy, Madingley Road, Cambridge CB3 0HA; )
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 382, Issue 2, pp. 895-902. (MNRAS Homepage)
Publication Date:
12/2007
Origin:
MNRAS
MNRAS Keywords:
galaxies: clusters: individual: Perseus, X-rays: galaxies
DOI:
10.1111/j.1365-2966.2007.12437.x
Bibliographic Code:
2007MNRAS.382..895S

Abstract

We present a study of the X-ray emission from the nuclei of galaxies observed in the core of the Perseus cluster in a deep exposure with Chandra. Point sources are found coincident with the nuclei of 13 early-type galaxies, as well as the central galaxy NGC1275. This corresponds to all galaxies brighter than MB > -18 in the Chandra field. All of these sources have a steep power-law spectral component and four have an additional thermal component. The unabsorbed power-law luminosities in the 0.5-7.0 keV band range from 8 × 1038 to 5 × 1040ergs-1. We find no simple correlations between the K-band luminosity, or the FUV and NUV AB magnitudes of these galaxies and their X-ray properties. We have estimated the black hole masses of the nuclei using the K-band MBH -LKbol relation and again find no correlation between black hole mass and the X-ray luminosity. Bondi accretion on to the black holes in the galaxies with minihaloes should make them much more luminous than observed.
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