Name | 030282 |
Title | A White Dwarf Accreting Asteroids |
URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0302820101 |
DOI | https://doi.org/10.5270/esa-d2va9x0 |
Author | Dr Michael Muno |
Description | We propose to observe the isolated white dwarf G29-38 (D = 14 pc) to search for X-rays from the accretion of circumstellar material. Most white dwarfs have atmospheres that are either pure H or He, but G29-38 is rare in that it also exhibits atmospheric metal lines, even though metals should settle out of the photosphere is only virgul20 years. G29-38 also exhibits excess infrared emission from orbiting dust that may have been produced by the tidal disruption of an asteroid. Accretion from this dust can account for the atmospheric metals. We expect between 3x10^25 and 8x10^27 erg/s in X-rays; the exact value would provide the first measurement of the efficiency of X-ray production at accretion rates orders of magnitudes below those detectable in CVs. |
Publication | No observations found associated with the current proposal |
Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2005-11-28T20:41:30Z/2005-11-29T03:35:08Z |
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 | 2007-02-04T00:00:00Z |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Dr Michael Muno, 2007, 030282, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-d2va9x0 |