Rosat Observations of Compact-Groups of Galaxies
dc.contributor.author | Pildis, R. A. | en_US |
dc.contributor.author | Bregman, Joel N. | en_US |
dc.contributor.author | Evrard, August E. | en_US |
dc.date.accessioned | 2008-08-14T19:11:10Z | |
dc.date.available | 2008-08-14T19:11:10Z | |
dc.date.issued | 1995-04-20 | en_US |
dc.identifier.citation | Pildis, RA; Bregman, JN; Evrard, AE. (1995). Astrophysical Journal, 443:(2, Part1) 514-526. <http://hdl.handle.net/2027.42/60593> | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://arxiv.org/abs/astro-ph/9501004 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/60593 | |
dc.description.abstract | We have systematically analyzed a sample of 13 new and archival ROSAT Position Sensitive Proportional Counter observations of compact groups of galaxies: 12 Hickson compact groups plus the NCG 2300 group. We find that approximately two-thirds of the groups have extended X-ray emission and, in four of these, the emission is resolved into diffuse emission from gas at a temperature of kT similar to 1 keV in the group potential. All but one of the groups with extended emission have a spiral fraction of less than 50%. The baryon fraction of groups with diffuse emission is 5%-19%, similar to the values in clusters of galaxies. However, with a single exception (HCG 62), the gas-to-stellar mass ratio in our groups has a median value near 5%, somewhat greater than the values for individual early-type galaxies and two orders of magnitude than in clusters of galaxies. The X-ray luminosities of individual group galaxies are comparable to those of similar field galaxies,although the L(X)-L(B) relation for early-type galaxies may be flatter in compact groups than in the field. | en_US |
dc.format.extent | 195116 bytes | |
dc.format.extent | 18 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | Univ Chicago Press | en_US |
dc.subject | Diffuse Radiation | en_US |
dc.subject | Galaxies : Clusters : General | en_US |
dc.subject | X-rays : Galaxies | en_US |
dc.title | Rosat Observations of Compact-Groups of Galaxies | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Physics | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationother | UNIV MICHIGAN,DEPT PHYS,ANN ARBOR,MI 48109 | en_US |
dc.contributor.affiliationumcampus | Ann Arbor | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/60593/1/Pildis1995ROSAT.pdf | |
dc.identifier.doi | http://dx.doi.org/10.1086/175544 | en_US |
dc.owningcollname | Astrophysics (Physics, Department of) |
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