A dataset provided by the European Space Agency

Name 015141
Title The Nature of the Luminous Supersoft X-ray Sources


DOI https://doi.org/10.5270/esa-5uf63pe
Author Dr Katherine McGowan
Description The highly luminous (>=10e37 erg-s) supersoft X-ray sources (SSS) are believed to be super-Eddington limited accreting white dwarfs undergoing surface hydrogen burning. The current paradigm for SSS (van den Heuvel et al. 1992) involves thermally unstable mass transfer from a 1-2 Msun companion. But this model has never been directly confirmed and yet is crucial for the evolution of cataclys- mic variables in general, and for the establishment of SSS as progenitors of type Ia supernovae in particular. The key SSS is RXJ0513.9-6951 which has recurrent X-ray outbursts every 100-150d (lasting virgul30d) during which the optical declines by 1 mag. We request TOO status to be triggered by optical monitoring so as to follow directly the predicted expansion of the white dwarf photosphere.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2004-04-28T17:52:12Z/2004-05-28T10:58:24Z
Version 17.56_20190403_1200
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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2005-06-18T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2005-06-18T00:00:00Z, 015141, 17.56_20190403_1200. https://doi.org/10.5270/esa-5uf63pe