A dataset provided by the European Space Agency

Name 072054
Title A test for the theory of colliding winds: the periastron passage of 9Sgr
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0720540401
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0720540501
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0720540601

DOI 10.5270/esa-i2zxyfo
Author Prof Gregor Rauw
Description We propose to monitor the X-ray emission of the 8.6-year period, highly eccentric (e = 0.7) O-type binary 9Sgr around its forthcoming periastron passage. 9Sgr is known to display a synchrotron radio emission due to relativistic electrons accelerated in the wind-wind collision region. This wind interaction zone is expected be in the adiabatic regime and the X-ray flux should thus scale as the inverse of the orbital separation. Observations near periastron and at subsequent orbital phases will allow us to test this scenario and to search for the possible presence of non-thermal X-ray emission, thereby setting constraints on the wind interaction phenomenon in a yet unexplored part of the parameter space.
Publication Testing the theory of colliding winds: the periastron passage of 9 Sagittarii. I. X-ray and optical spectroscopy . Rauw, G., Blomme, R., et all. . A&A . 589-121 . 2016 . 2016A&A...589A.121R ,
The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
Is the Pollock.s paradigm of X-ray emission for O stars correct? . Ryspaeva, E. B., Kholtygin, A. F., . AN . 338-959 . 2017 . 2017AN....338..959R ,
Analysis of the X-ray emission of OB stars: O stars . Ryspaeva, Elizaveta, Kholtygin, Alexander, . RAA . 18-104 . 2018 . 2018RAA....18..104R ,
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2013-03-08T16:13:31Z/2014-03-05T13:56:47Z
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 2015-04-22T22:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2015-04-22T22:00:00Z, 072054, 17.56_20190403_1200. https://doi.org/10.5270/esa-i2zxyfo