NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-20 T12:58:45 PDT
Help | Comment | NED Home

For refcode 2000A&A...356..788C:
Retrieve 1 NED object in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
2000A&A...356..788C Asymmetric, arc minute scale structures around NGC 1275. CHURAZOV E., FORMAN W., JONES C., BOEHRINGER H. Received 1 April 1999/Accepted 25 February 2000 Abstract: ROSAT HRI observations show complicated substructure in the X-ray surface brightness within ~5 arcminutes around NGC 1275 - the dominant galaxy of the Perseus cluster. The typical amplitude of the variations is of the order of 30% of the azimuthally averaged surface brightness at a given distance from NGC 1275. We argue that this substructure could be related to the activity of NGC 1275 in the past. Bubbles of relativistic plasma, inflated by jets, being forced to rise by buoyancy forces, mix with the ambient intracluster medium (ICM), and then spread. Overall evolution of the bubble may resemble the evolution of a hot bubble during a powerful atmospheric explosion. From a comparison of the time scale of the bubble inflation to the rise time of the bubbles and from the observed size of the radio lobes which displace the thermal gas, the energy release in the relativistic plasma by the active nucleus of NGC 1275 can be inferred. Approximate modeling implies a nuclear power output of the order of 10^45^erg s^-1^ averaged over the last ~3 x 10^7^ years. This is comparable with the energy radiated in X-rays during the same epoch. Detailed measurements of the morphology of the X-ray structure, the temperature and abundance distributions with Chandra and XMM may test this hypothesis. Key words: galaxies: clusters: individual: A426 - galaxies: cooling flows - galaxies: individual: NGC 1275 - galaxies: ISM - X-rays: galaxies
Retrieve 1 NED object in this reference.
Please click here for ADS abstract

Back to NED Home