A dataset provided by the European Space Agency

Name 074014
Title The X-ray emission of the sdO star BD+37 1977


DOI https://doi.org/10.5270/esa-zohp34t
Author Mr Nicola La Palombara
Description While several hot subdwarf stars have been deeply investigated in the optical and UV domain, up to very recent times only the sdO stars HD49798 and BD+37 442 had been detected at X-rays. Both sources are characterized by comparable spectral and timing properties; in particular, the flux shows a fast periodic modulation, likely due to wind accretion from the sdO star onto a WD or NS companion. In the latest months the first systematic search for X-ray emission from a complete flux-limited sample of sdO stars, performed by Chandra, has provided a detection also of the sdO star BD+37 1977. Now we propose to observe this star with XMM: our aim is to characterize in detail its spectral X-ray properties and to investigate if it is intrinsic or due to an accreting compact companion.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2014-04-14T15:00:25Z/2014-04-24T18:40:04Z
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 2015-05-16T22:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2015-05-16T22:00:00Z, 074014, 17.56_20190403_1200. https://doi.org/10.5270/esa-zohp34t