| Proposal ID | 072419 |
| Title | Phase resolved observations of the massive WNLh+O colliding wind binary WR21a |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0724190501 |
| DOI | https://doi.org/10.5270/esa-r50j7cl |
| Principal Investigator, PI | Dr Eric Gosset |
| Abstract | We propose to observe the WNLh+O colliding wind (CW) binary system WR21a at fivedifferent phases along its 31-day orbit in order to improve our knowledge of thephysics of the wind-wind collisions emitting X-rays. The expected variability asa function of phase provide strong constraints on the structure of thecollision. In turn, this will enable us to derive wind parameters such as thecontroversial mass-loss rates of WNLh stars, which are extremely massive stars,thanks to the use of hydrodynamical models. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2013-06-14T20:48:06Z/2013-07-29T13:14:48Z |
| Version | 17.56_20190403_1200 |
| Mission Description | The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2014-08-31T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "massive wnlh", "mass loss rates", "wnlh stars", "phase resolved", "wind parameters", "massive stars", "hydrodynamical models" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Eric Gosset, 2014, 'Phase resolved observations of the massive WNLh+O colliding wind binary WR21a', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-r50j7cl |