A dataset provided by the European Space Agency

Name 072419
Title Phase resolved observations of the massive WNLh+O colliding wind binary WR21a


DOI https://doi.org/10.5270/esa-r50j7cl
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 No observations found associated with the current proposal
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 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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2014-08-31T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Eric Gosset, 2014, 072419, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-r50j7cl