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Effects of the variability of the nucleus of NGC 1275 on X-ray observations of the surrounding intracluster medium

Fabian, A.C.; Walker, S.A.; Pinto, C.; Russell, H.R.; Edge, A.C.

Effects of the variability of the nucleus of NGC 1275 on X-ray observations of the surrounding intracluster medium Thumbnail


Authors

A.C. Fabian

S.A. Walker

C. Pinto

H.R. Russell



Abstract

The active galaxy NGC 1275 lies at the centre of the Perseus cluster of galaxies, which is the X-ray brightest cluster in the Sky. The nucleus shows large variability over the past few decades. We compile a light curve of its X-ray emission covering about 40 years and show that the bright phase around 1980 explains why the inner X-ray bubbles were not seen in the images taken with the Einstein Observatory. The flux had dropped considerably by 1992 when images with the ROSAT HRI led to their discovery. The nucleus is showing a slow X-ray rise since the first Chandra images in 2000. If it brightens back to the pre-1990 level, then X-ray absorption spectroscopy by ASTRO-H can reveal the velocity structure of the shocked gas surrounding the inner bubbles.

Citation

Fabian, A., Walker, S., Pinto, C., Russell, H., & Edge, A. (2015). Effects of the variability of the nucleus of NGC 1275 on X-ray observations of the surrounding intracluster medium. Monthly Notices of the Royal Astronomical Society, 451(3), 3061-3067. https://doi.org/10.1093/mnras/stv1134

Journal Article Type Article
Publication Date Aug 1, 2015
Deposit Date Oct 28, 2015
Publicly Available Date Mar 29, 2024
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 451
Issue 3
Pages 3061-3067
DOI https://doi.org/10.1093/mnras/stv1134
Keywords Galaxies: active, Galaxies: clusters: individual: Perseus, Galaxies: individual: NGC 1275
Publisher URL http://ukads.nottingham.ac.uk/abs/2015MNRAS.451.3061F

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Copyright Statement
This article has been published in Monthly Notices of the Royal Astronomical Society ©: 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.





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