| Name | 067139 |
| Title | The stellar wind of hot subdwarf stars |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0671390101 |
| DOI | https://doi.org/10.5270/esa-vv7pyiu |
| Author | European Space Agency |
| Description | All we know about hot subdwarf (sd) stars is based on studies in the optical and UV domain, while none of them has been detected at X-rays. The only exception is the sdO binary HD49798, in which the WD companion shows a significant X-ray emission, due to the matter accreted from the sd primary. A recent XMM observation of this source has revealed a significant X-ray emission also during the eclipse phase, when the WD is obscured by the primary subdwarf, thus suggesting that the observed X-ray flux is due to the subdwarf itself. In order to investigate if also other sdO stars are characterized by an intrinsic X-ray emission, we propose to observe BD+37 442: it is a nearby and bright sdO star with a strong stellar wind, therefore it is the best candidate to perform this type of search. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2011-08-21T23:52:42Z/2011-08-22T09:11:23Z |
| 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 | 2012-09-13T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2012, The Stellar Wind Of Hot Subdwarf Stars, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-vv7pyiu |