| Proposal ID | 000882 |
| Title | An XMM investigation of non-thermal phenomena in the winds of early-type stars |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0008820101 |
| DOI | https://doi.org/10.5270/esa-cqy6xzm |
| Principal Investigator, PI | Dr Gregor Rauw |
| Abstract | We propose to observe the hard non-thermal X-ray emission from presumably single O-type stars known to display strong non-thermal emission in the radio domain. Theoretical models predict the existence of a small population of relativistic electrons accelerated in strong shocks in the winds of O stars. Given the enormous supply of UV photons from these stars, inverse-Comptonscattering should generate a substantial non-thermal X-ray emission. XMM is the very first X-ray observatory that has the sensitivity required to measure this emission. Studying this phenomenon will provide important insight intothe properties of the relativistic electron population in the winds of OB starsand could eventually provide the very first measurement of the magnetic field |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2001-03-08T11:22:34Z/2002-09-09T08:48:46Z |
| Version | PPS_NOT_AVAILABLE |
| Mission Description | The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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 | 2005-01-01T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "relativistic electron population", "radio domain", "ob stars", "magnetic field", "nonthermal emission", "models predict", "type stars", "nonthermal phenomena", "uv photons", "XMM", "relativistic electrons accelerated", "xray observatory", "xmm investigation", "inverse compton scattering" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Gregor Rauw, 2005, 'An XMM investigation of non-thermal phenomena in the winds of early-type stars', PPS_NOT_AVAILABLE, European Space Agency, https://doi.org/10.5270/esa-cqy6xzm |