2000A&A...356..788C


Query : 2000A&A...356..788C

2000A&A...356..788C - Astronomy and Astrophysics, volume 356, 788-794 (2000/4-3)

Asymmetric, arc minute scale structures around NGC 1275.

CHURAZOV E., FORMAN W., JONES C. and BOEHRINGER H.

Abstract (from CDS):

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 1045erg/s averaged over the last ∼3x107 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.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: A426 - galaxies: cooling flows - galaxies: individual: NGC 1275 - galaxies: ISM - X-rays: galaxies

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 1272 GiG 03 19 21.300 +41 29 26.13   14.5 13.66     ~ 112 0
2 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2093 1
3 3C 84 Sy2 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 3766 3
4 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6642 3
5 ESO 322-81 GiG 12 47 21.7580187672 -41 14 15.042113484   13.84   12.07 12.7 ~ 59 0
6 ACO 3526 ClG 12 48 51.8 -41 18 21           ~ 1016 2
7 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4501 2
8 NGC 4921 LIN 13 01 26.1222244152 +27 53 09.629006748   13.7       ~ 188 0

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2022.05.19-19:35:56

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