HD49798/RXJ0648-4418 is an X-ray binary with unique properties: the primary staris the brightest known subdwarf of early spectral type, while the secondary isthe fastest rotating (P=13.2 s) and one of the most massive (M>1.2 Msun) whitedwarfs currently known. We propose a follow-up study to better understand theproperties of the X-ray emission and derive tighter constraints on the masses ofthis interesting post-common envelope binary. In addition, observations near thetime of the eclipse will provide for the first time information on the stellarwind properties of a hot subdwarf.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2011-05-02T13:10:57Z/2011-09-08T04:36:28Z
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 SANDRO MEREGHETTI, 2012, 'The fast-spinning ultra-massive white dwarf companion of HD 49798', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-8f8edsj
