A dataset provided by the European Space Agency

Name 067206
Title What causes the dispersion of the O-star X-ray luminosities ?


DOI https://doi.org/10.5270/esa-loy8ag4
Author Dr Hugues Sana
Description O-type X-ray luminosity scales with their bolometric luminosity according to canonical relation: log L_X-L_bol virgul -7. Yet, significant dispersion is observed around this relation. Binarity was often considered as a natural explanation to the observed dispersion but recent investigations tend to disprove this statement. We propose to investigate the impact of magnetic wind confinement on the X-ray properties of O stars, and whether or not it can explain the spread around the canonical relation. The nearby young open cluster, IC2944, hosts a rich late-type O-star population and is ideally suited for our purpose. It will allow us to investigate with unprecedented details a region of the parameter space where magnetic confinement is expected to have the strongest impact.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2012-01-01T09:42:07Z/2012-01-01T21:20:37Z
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 2013-01-27T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013-01-27T00:00:00Z, 067206, 17.56_20190403_1200. https://doi.org/10.5270/esa-loy8ag4