A dataset provided by the European Space Agency

Name 030183
Title The Oldest Cataclysmic Variables


DOI https://doi.org/10.5270/esa-fbbzmcg
Author Prof Joseph Patterson
Description Angular momentum loss grinds cataclysmic variables down to very short period on relatively short timescales (1-3 Gyr); then they should "bounce" at Porbvirgul80 min and begin evolving back to longer period. Since the Galaxy is 10 Gyr old, these "period bouncers" should now be extremely numerous. Unfortunately, none have yet been securely identified. We believe we have finally identified a few of these stars (5), based on their very low mass ratios. These stars are a newly recognized class of CV, and 1-10 keV X-rays appear to be a major part (about half) of their accretion luminosity budget. XMM observations would clarify the origin of the X-rays and probe physical conditions in the accreting gas, donated by a star which has been stripped down to 0.02-0.04 solar masses.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2005-06-16T08:17:45Z/2005-06-18T15:46:22Z
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 2006-07-14T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2006-07-14T00:00:00Z, 030183, 17.56_20190403_1200. https://doi.org/10.5270/esa-fbbzmcg