|Title||X-ray investigation of the first gamma-ray emitter associated with a WR star|
|Author||Mr Jean-Christophe Leyder|
|Description||A systematic search for hard X-ray and soft gamma-ray emission from Wolf-Rayet (WR) stars, performed using the ISGRI imager, led to the detection of WR 115 (26-51 keV). This high-energy emission is expected to be produced by non-thermal relativistic particles, through several possible mechanisms. However, it is still unknown which of these proposed mechanisms is responsible for the observed emission, and whether the corresponding X-ray emission is of a thermal or non-thermal origin. Therefore, we propose to observe this first gamma-ray emitter associated with a WR+O system. These observations of WR 115 with XMM-Newton will help to confirm the origin of the emission seen at higher energies, and to pinpoint the emission mechanisms thanks to a thorough analysis of its X-ray spectrum.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|Mission Description||The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations.
Since Earth's atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2009-06-06T00:00:00Z, 050553, 17.56_20190403_1200. https://doi.org/10.5270/esa-df7hryl|