A dataset provided by the European Space Agency

Name 055605
Title X-ray study of an enigmatic hard X-ray emitting normal B star
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0556050101

DOI https://doi.org/10.5270/esa-brr394p
Author Dr Christian Motch
Description Our search for new Gamma-Cas analogs in the 2XMMp catalogue has led to the
discovery of very hard X-ray emission (kT virgul 7 keV) from an otherwise normal
K=8.8 B2-3V star. The Log(Lx) of 32.4 is typical for Gamma-Cas analogs. However,
the absence of any circumstellar disc, five years after the XMM observations,
opens the possibility that the star is one of the wind accreting neutron star
binaries predicted by massive binary evolution theories. The discovery and study
of such a system would allow to test evolutionary models and quantify the
contribution of these systems to the overall population of accreting galactic
sources. We propose to re-observe the source with XMM-Newton and obtain
simultaneous optical spectroscopy to determine its true nature.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2008-05-02T10:58:18Z/2008-05-02T18:43:31Z
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 2009-06-10T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Christian Motch, 2009, 055605, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-brr394p