We propose to use the excellent sensitivity of XMM-Newton to conduct a searchfor X-ray emission in five of the closest known carbon-rich (WC) Wolf-Rayetstars. Our primary objective is to determine if single WC stars withoutcompanions are X-ray sources. X-ray emission is expected to originate in theirpowerful shocked winds, and a few weak X-ray detections have been reported. But,our review of the archive data indicates that these detections are in doubt andthe X-ray properties of WC stars as a class remain essentially unknown. EPICwill reach detection limits an order of magnitude below previous values and willprovide the information on X-ray emission levels in WC stars that is needed toplan a broader survey of this understudied class of luminous evolved objects.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2003-09-04T13:50:59Z/2003-09-13T17:54:50Z
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.
European Space Agency, Dr Stephen Skinner, 2004, 'A Search for X-ray Emission in Carbon-rich Wolf-Rayet Stars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-e6k74nx
