A dataset provided by the European Space Agency

Name 020120
Title THE NATURE OF THE ACCRETING OBJECT IN HD 161103 AND SAO 49725
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0201200101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0201200201

DOI https://doi.org/10.5270/esa-eerp0yo
Author Dr CHRISTIAN MOTCH
Description ROSAT observations have shown that the Be stars HD 161103 and SAO 49725 exhibit an excess of X-ray emission over the normal shocked wind component. The relatively modest X-ray luminosity of about 1 to 5 E32 erg-s (0.2-2.4 keV) is consistent with that expected from a white dwarf accreting from the equatorial disc of a Be star. Whereas models predict that they should outnumber Be + neutron star binaries by a factor of about 10, no Be + white dwarf system has ever been confirmed so far. This absence casts some doubts on our current understanding of massive X-ray binary evolution. The goal of the proposed observation is to characterize the X-ray spectral and temporal properties of these X-ray emitters and search for the signatures of an accreting white dwarf.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2003-12-09T20:31:41Z/2004-02-26T13:49:39Z
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 2008-01-11T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2008-01-11T00:00:00Z, 020120, 17.56_20190403_1200. https://doi.org/10.5270/esa-eerp0yo