ROSAT Observations of Compact Groups of Galaxies
| dc.creator | Saracco, P. | |
| dc.creator | Ciliegi, P. | |
| dc.date | 1994-12-11 | |
| dc.date | 1994-12-15 | |
| dc.date.accessioned | 2026-07-07T08:58:16Z | |
| dc.date.available | 2026-07-07T08:58:16Z | |
| dc.description | A search for X-ray emission from compact groups revealed detection from 8 out of the 12 HCG images extracted from the ROSAT public archive. For two of them the X-ray emission originates from galaxies in the group. On the contrary, three groups show an extended emission clearly caused by hot intracluster gas. A Raymond-Smith hot plasma model provides an excellent fit to the X-ray spectra. The estimated temperatures are distributed in a quite narrow range (from 0.73 to 0.92 keV) and are consistent, within the errors, with 0.9 keV. The luminosity ranging from 0.75 to $5.1\cdot10^{42}$erg s$^{-1}$. The most relevant result is the low metal abundance surely detected in two of them and likely in a third that characterizes the hot gas cloud responsible for the X-ray emission. The data concerning the remaining 3 detected compact groups are not sufficient to discriminate with certainty between diffuse and/or point-like X-ray emission. However the results of the spectral analysis point to the presence of a hot gas again with low metal abundance. | |
| dc.description | uuncoded PostScript file (27 pages). Hard copy figures will be sent upon request (saracco@bach.mi.astro.it) | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9412040 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9412040 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/147259 | |
| dc.subject | Astrophysics | |
| dc.title | ROSAT Observations of Compact Groups of Galaxies | |
| dc.type | text |