|Title||Helium-rich thermonuclear bursts from the Slow Burster|
|Author||Dr Duncan Galloway|
|Description||Thermonuclear bursts in systems accreting pure helium reveal the structure of the neutron star (NS) interiors. Without heating from steady H-burning between bursts, the burst recurrence times and energetics are more sensitive to the thermal properties and processes in the NS crust and core. Burst ignition models predict longer burst recurrence times than observed which may be due to fractional covering of the accreted fuel on the NS surface, supported by recent analyses of several bursts from 4U 172834. But other processes including steady He-burning or incomplete burning, may also be important. Simultaneous INTEGRAL-XMM observations of 4U 172834 allow measurements of the burst recurrence time and accretion rate, to distinguish between these possibilities.|
|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, 2014-10-17T00:00:00Z, 070119, 17.56_20190403_1200. https://doi.org/10.5270/esa-stqsuwb|