Radio jets and diffuse X-ray emission around the peculiar galaxy pair ESO 295-IG022

被引:4
作者
Read, AM [1 ]
Filipovic, MD
Pietsch, W
Jones, PA
机构
[1] Max Planck Inst Extraterr Phys, D-85741 Garching, Germany
[2] Univ Western Sydney Nepean, Kingswood, NSW 2747, Australia
[3] CSIRO, Australia Telescope Natl Facil, Epping, NSW 2121, Australia
关键词
galaxies : clusters : individual : Abell S0102; galaxies : individual : ESO 295-IG022; galaxies : interactions; galaxies : jets; radio continuum : galaxies; X-rays : galaxies;
D O I
10.1051/0004-6361:20010128
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report Australia Telescope Compact Array (ATCA) radio-continuum and ROSAT PSPC X-ray observations of the region surrounding the peculiar galaxy pair ESO 295-IG022, lying at the centre of the poor cluster AbellS0102. We identify a radio galaxy coincident with the galaxy pair, with bipolar, bent radio jets appearing centred on the southern galaxy, and extending both to the south, for about 95 "(approximate to 100 kpc at the distance of ESO 295-IG022), and to the north, for approximate to 80 ", encompassing the northern galaxy. We discuss also the idea of an additional single jet structure from the northern grtlauy contributing to the emission. We estimate lower limit jet velocities of at least 1000 kms(-1), and a relative proper velocity for the southern galaxy through the cluster of similar to 200 kms(-1). Diffuse (kT = 2.2 keV) X-ray emission consistent with group or poor cluster emission is seen centred on the southern galaxy surrounding the galaxy pair and the associated radio jets. Structure within the radio jets and the X-ray emission is very suggestive of there being some channeling of the radio emission with the surrounding intragroup medium. Another bipolar jet radio galaxy, discovered close by, is likely to be a background object, the optical counterpart having a magnitude m > 22.
引用
收藏
页码:467 / 472
页数:6
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