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A deep Chandra observation of the Centaurus cluster:: bubbles, filaments and edges
被引:91
作者:
Fabian, AC
Sanders, JS
Taylor, GB
Allen, SW
机构:
[1] Inst Astron, Cambridge CB3 0HA, England
[2] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA
[3] Natl Radio Astron Observ, Socorro, NM 87801 USA
关键词:
galaxies : clusters : individual : Centaurus;
intergalactic medium;
X-rays : galaxies;
D O I:
10.1111/j.1745-3933.2005.00037.x
中图分类号:
P1 [天文学];
学科分类号:
0704 ;
摘要:
X-ray images and gas temperatures taken from a deep approximate to 200-ks Chandra observation of the Centaurus cluster are presented. Multiple inner bubbles and outer semicircular edges are revealed, together with wispy filaments of soft X-ray emitting gas. The frothy central structure and eastern edge are likely due to the central radio source blowing bubbles in the intracluster gas. The semicircular edges to the surface brightness maps 32 kpc to the east and 17.5 kpc to the west are marked by sharp temperature increases and abundance drops. The edges could be due to sloshing motions of the central potential, or are possibly enhanced by earlier radio activity. The high abundance of the innermost gas (about 2.5 times solar) limits the amount of diffusion and mixing taking place.
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页码:L20 / L24
页数:5
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