A dataset provided by the European Space Agency

Name 020598


DOI https://doi.org/10.5270/esa-us4g8hk
Description Low-accretion rate polars escaped detection in the RASS and were discovered recently in chance in optical surveys (HQS, SDSS) as CVs in permanent states of low accretion. The presence of such systems is not predicted by current theories of CV evolution. Establishing their detailed properties is the first important step in understanding their role in this respect. We propose XMM-Newton observations with full-phase coverage of the brightest of the presently known 4 systems. With EPIC we test the bombardement accretion scenario. With the OM we determine the photospheric temperature distribution of the accreting white dwarf. This experiment is important for our understanding of the secular heating and cooling processes in accreting magnetic white dwarfs.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2004-04-24T04:31:45Z/2004-04-24T13:06:55Z
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, 020598, 17.56_20190403_1200. https://doi.org/10.5270/esa-us4g8hk