A dataset provided by the European Space Agency

Name 055574
Title The origin of X-rays in the progenitors of polars


DOI https://doi.org/10.5270/esa-n2lrfq2
Author Mr Justus Vogel
Description We propose to observe HS0922+1333, one of the rare progenitors of normal polars, accreting from the stellar wind of the companion star. Due to the extremely low accretion rate they enable us to observe crucial details of accretion physics which are not accessible in polars already accreting via Roche-lobe overflow. The special geometry of HS0922 also provides the opportunity to get an undisturbed view of the companion star in X-rays, and may thus give a clue to the question of the secondaries being comparable to single active late type stars. HS0922 is therefore an exceptional target for verifying the current models of the accretion regions on compact stars, of magnetic activity on fastly rotating late-type stars, and of binary evolution.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2008-11-04T06:39:49Z/2008-11-04T19:31:47Z
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 2009-11-27T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2009-11-27T00:00:00Z, 055574, 17.56_20190403_1200. https://doi.org/10.5270/esa-n2lrfq2