Nature of the Unidentified TeV Source HESS J1614-518, Revealed by Suzaku and XMM-Newton Observations
Sakai, M; Yajima, Y; Matsumoto, H
| HERO ID | 1890220 |
|---|---|
| In Press | No |
| Year | 2011 |
| Title | Nature of the Unidentified TeV Source HESS J1614-518, Revealed by Suzaku and XMM-Newton Observations |
| Authors | Sakai, M; Yajima, Y; Matsumoto, H |
| Volume | 63 |
| Page Numbers | S879-S887 |
| Abstract | We report on new Suzaku and XMM-Newton results concerning HESS J1614-518, which is one of the brightest extended TeV gamma-ray sources and has two regions with intense gamma-ray emission. We newly observed the south and center regions of HESS J1614-518 with Suzaku, since the north region, including the position of the 1st brightest peak of the TeV gamma-ray emission, has already been observed. No X-ray counterpart was found at the position of the 2nd brightest peak of the TeV gamma-ray emission; we estimated the upper limit of the X-ray flux to be 1.6 x 10(-13) erg cm(-2) s(-1) in the 2-10 keV band. The soft X-ray source Suzaku J1614-5152, which was found at the edge of the field of view in a previous observation, was also detected at the middle of HESS J1614-518. Analyzing the XMM-Newton archival data, we revealed that Suzaku JI614-5152 consists of multiple point sources. The X-ray spectrum of the brightest point source, XMMU J161406.0-515225, can be described by a power-law model with a photon index of Gamma = 5.2(-0.5)(+0.6), or a blackbody model with temperature kT = 0.38(-0.04)(+0.04) keV. In the blackbody model, the hydrogen-equivalent column density is almost the same as that of the hard extended X-ray emission, Suzaku J1614-5141, which was found at the 1st peak position. If true, XMMU J161406.0-515225 may be physically related to Suzaku J1614-5141 and HESS J1614-518. |
| Wosid | WOS:000299191800026 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal:PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 0004-6264 |
| Is Public | Yes |
| Keyword | acceleration of particles; X-rays: individual (HESS J1614-518) |