|Title||The fast-spinning ultra-massive white dwarf companion of HD 49798|
|Author||Dr SANDRO MEREGHETTI|
|Description||HD49798-RXJ0648-4418 is an X-ray binary with unique properties: the primary star is the brightest known subdwarf of early spectral type, while the secondary is the fastest rotating (P=13.2 s) and one of the most massive (M>1.2 Msun) white dwarfs currently known. We propose a follow-up study to better understand the properties of the X-ray emission and derive tighter constraints on the masses of this interesting post-common envelope binary. In addition, observations near the time of the eclipse will provide for the first time information on the stellar wind properties of a hot subdwarf.|
|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, 2012-10-12T00:00:00Z, 067124, 17.56_20190403_1200. https://doi.org/10.5270/esa-8f8edsj|