| | |
| | |
Stat |
Members: 3645 Articles: 2'504'928 Articles rated: 2609
25 April 2024 |
|
| | | |
|
Article overview
| |
|
Source identification in the IGR J17448-3232 field: discovery of the Scorpius galaxy cluster | Nicolas M. Barrière
; John A. Tomsick
; Daniel R. Wik
; Sylvain Chaty
; Jérome Rodriguez
; | Date: |
6 Nov 2014 | Abstract: | We use a 43-ks XMM-Newton observation to investigate the nature of sources
first distinguished by a follow-up Chandra observation of the field surrounding
INTEGRAL source IGR J17448-3232, which includes extended emission and a bright
point source previously classified as a blazar. We establish that the extended
emission is a heretofore unknown massive galaxy cluster hidden behind the
Galactic bulge. The emission-weighted temperature of the cluster within the
field of view is 8.8 keV, with parts of the cluster reaching temperatures of up
to 12 keV; no cool core is evident. At a redshift of 0.055, the cluster is
somewhat under-luminous relative to the X-ray luminosity-temperature relation,
which may be attributable to its dynamical state. We present a preliminary
analysis of its properties in this paper. We also confirm that the bright point
source is a blazar, and we propose that it is either a flat spectrum radio
quasar or a low-frequency peaked BL Lac object. We find four other fainter
sources in the field, which we study and tentatively identify. Only one, which
we propose is a foreground Galactic X-ray binary, is hard enough to contribute
to IGR J17448-3232, but it is too faint to be significant. We thus determine
that IGR J17448-3232 is in fact the galaxy cluster up to $approx$45 keV and
the blazar beyond. | Source: | arXiv, 1411.1677 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |