A dataset provided by the European Space Agency

Name 050511
Title A follow-up study of the colliding wind binary Cyg OB2 8a
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0505110301
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0505110401
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0505110501

DOI https://doi.org/10.5270/esa-byh57pf
Author Dr Gregor Rauw
Description We propose to observe the colliding wind binary Cyg OB2 #8a (O6If + O5.5III(f))
for 3 x 20 ksec near specific orbital phases. Previous XMM-Newton observations
revealed a modulation of the X-ray flux of this system. At the same time, the
radio emission of Cyg OB2 #8a also undergoes a phase-locked variation. The joint
analysis of the variations in the X-ray and radio domains will provide
unprecedented information on the interplay between colliding wind interactions
and the acceleration of relativistic particles that produce the non-thermal
radio emission. The Cyg OB2 cluster further harbours a number of early-type
stars (two of them are non-thermal radio emitters) that are bright X-ray
sources, as well as a wealth of secondary sources (most of them being low-mass PMS stars).
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2007-04-29T16:23:01Z/2007-05-03T20:37:49Z
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 2008-12-11T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Gregor Rauw, 2008, 050511, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-byh57pf