| Proposal ID | 030656 |
| Title | X-ray eclipse mapping of disc-accreting white dwarfs |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0306560301 |
| DOI | https://doi.org/10.5270/esa-vxa0qm0 |
| Principal Investigator, PI | Dr Peter Wheatley |
| Abstract | We have applied the proven optical technique of eclipse mapping to X-rayobservations of disc-accreting white dwarfs, allowing us to map the extent anddistribution of X-ray emitting plasma around the compact object. Observations offour different systems have allowed us to build a consistent picture of theaccretion geometry that depends only on accretion rate. At low rates the X-rayregion is smaller than the white dwarf, but at high rates it is much larger.Here we propose an observation of ONE of our well-studied low accretion ratesystems, to be triggered when it enters a high accretion rate state. This willallow us to test our basic picture in a system that differs only in accretionrate and investigate the origin of the second source of X-rays. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2005-09-30T01:22:41Z/2005-10-01T02:05:14Z |
| Version | 17.56_20190403_1200 |
| Mission Description | The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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 | 2006-10-25T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "accretion rate", "proven optical technique", "compact object", "eclipse mapping", "low rates", "xray emitting plasma", "accretion geometry", "white dwarf", "basic picture", "xray region" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Peter Wheatley, 2006, 'X-ray eclipse mapping of disc-accreting white dwarfs', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-vxa0qm0 |