|Title||Origin of the hard X-ray emission in Gamma Cas analogs: HD 110432|
|Author||Dr Christian Motch|
|Description||A small group of early Be stars (the class of Gamma Cas analogs) exhibit low luminosity hard X-ray emission with Log(Lx) virgul 32-33 erg-s. Both a white dwarf accreting from the circumstellar disc or magnetic interaction between the photosphere and the disc can explain the unusually hard X-ray emission. The target of the proposal, HD 110432, is after Gamma Cas itself, the X-ray brightest member of this group and furthermore displays more marked characteristics of this class than the prototype. We propose to obtain a RGS spectrum of HD 110432 in order to constrain the X-ray emission mechanism using emission line disgnostics, investigate the effect of a different disc inclination, search for abundances anomalies and look for stable periodicities.|
|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, 2008-12-02T00:00:00Z, 050473, 17.56_20190403_1200. https://doi.org/10.5270/esa-jlxxsng|