|Title||Phase resolved observations of the massive WNLh+O colliding wind binary WR21a|
|Author||Dr Eric Gosset|
|Description||We propose to observe the WNLh+O colliding wind (CW) binary system WR21a at five different phases along its 31-day orbit in order to improve our knowledge of the physics of the wind-wind collisions emitting X-rays. The expected variability as a function of phase provide strong constraints on the structure of the collision. In turn, this will enable us to derive wind parameters such as the controversial mass-loss rates of WNLh stars, which are extremely massive stars, thanks to the use of hydrodynamical models.|
|Publication||The X-ray light curve of the massive colliding wind Wolf-Rayet + O binary WR 21a . Gosset, Eric, Naze, Yael, . A&A . 590-113 . 2016 . 2016A&A...590A.113G ,
The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
|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, 2014-08-31T00:00:00Z, 072419, 17.56_20190403_1200. https://doi.org/10.5270/esa-r50j7cl|