| Name | 055574 |
| Title | The origin of X-rays in the progenitors of polars |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0555740101 |
| DOI | https://doi.org/10.5270/esa-n2lrfq2 |
| Author | European Space Agency |
| 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, The Origin Of X-Rays In The Progenitors Of Polars, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-n2lrfq2 |