X-rag wakes in Abell 160

被引:16
作者
Drake, N [1 ]
Merrifield, MR
Sakelliou, I
Pinkney, JC
机构
[1] Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England
[2] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England
[3] UCL, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England
[4] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA
关键词
galaxies : clusters : individual : Abell 160; galaxies : kinematics and dynamics; X-rays : galaxies;
D O I
10.1046/j.1365-8711.2000.03381.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
'Wakes' of X-ray emission have now been detected trailing behind a few (at least seven) elliptical galaxies in clusters. To quantify how widespread this phenomenon is, and what its nature might be, we have obtained a deep (70 ks) X-ray image of the poor cluster Abell 160 using the ROSAT HRI. Combining the X-ray data with optical positions of confirmed cluster members, and applying a statistic designed to search for wake-like excesses, we confirm that this phenomenon is observed in galaxies in this cluster. The probability that the detections arise from chance is less than 3.8 x 10(-3). Further, the wakes are not randomly distributed in direction, but are preferentially oriented pointing away from the cluster centre. This arrangement can be explained by a simple model in which wakes arise from the stripping of the interstellar media of their host galaxies as a result of ram pressure against the intracluster medium through which they travel.
引用
收藏
页码:768 / 774
页数:7
相关论文
共 15 条
[11]  
PINKNEY J, 1995, THESIS NEW MEXICO ST
[12]   THE MORPHOLOGY AND METAL ABUNDANCE OF M86 FROM ROSAT PSPC AND HRI OBSERVATIONS - DUST DESTRUCTION IN SUPERSONIC RAM-PRESSURE STRIPPING [J].
RANGARAJAN, FVN ;
WHITE, DA ;
EBELING, H ;
FABIAN, AC .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1995, 277 (03) :1047-1062
[13]   X-ray emission from the galaxies in Abell 2634 [J].
Sakelliou, I ;
Merrifield, MR .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1998, 293 (04) :489-496
[14]   THE BELL-LABORATORIES H-I SURVEY [J].
STARK, AA ;
GAMMIE, CF ;
WILSON, RW ;
BALLY, J ;
LINKE, RA ;
HEILES, C ;
HURWITZ, M .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1992, 79 (01) :77-&
[15]   Galaxies in clusters: the observational characteristics of bow shocks, wakes and tails [J].
Stevens, IR ;
Acreman, DM ;
Ponman, TJ .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1999, 310 (03) :663-676