|Title||Quantifying the Accretion Rate of V1500 Cygni|
|Author||Dr Thomas Harrison|
|Description||V1500 Cyg is an old classical nova that harbors a highly magnetic white dwarf primary. V1500 Cyg erupted in 1975, but recent infrared observations reveal a source with large amplitude variations that had been ascribed to irradiation of the secondary star by the hot primary. We find, however, that a substantial fraction of the orbitally modulated light is due to cyclotron emission, suggesting magnetic accretion is the dominant irradiation source. Thus, V1500 Cyg has an accretion rate that is much higher than found in other old novae. Such anomalously high accretion rates could allow the mass of the white dwarfs in such systems to grow to the Chandrasekhar limit, and thus highly magnetic old novae are excellent candidates for producing Type Ia SNe.|
|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, 2015-12-03T23:00:00Z, 074000, 17.56_20190403_1200. https://doi.org/10.5270/esa-41ctpgx|