| Proposal ID | 009003 |
| Title | RGS Abundance Measurement of Wolf-Rayet Stellar Wind |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0090030201 |
| DOI | https://doi.org/10.5270/esa-tdqk5r5 |
| Principal Investigator, PI | Dr Yoshitomo Maeda |
| Abstract | The Wolf-Rayet system HD 193793 is a wide binary classified as WC7 + O4-5with an orbital period of 7.94 years. HD 193793 emits the thin thermal X-ray emission from the colliding wind shock. The X-ray spectrum is alsoheavily absorbed below 2 keV by the Wolf-Rayet wind. We thus proposeRGS/XMM observation of HD 193793 in November 2001, 10 months after periastron passage. With the highspectroscopic capability of RGS, we expect to clearly detect neon K-lines and K-edge in the spectrum, which allow us tomeasure neon abundance for the first time. The neon abundance in W-R winds ishelpful to constrain the chemical evolution of massive stars and crucial to ourunderstanding of the Galaxy, the ISM and the cosmic-rays. |
| Publications |
|
| Instrument | RGS1, EPN, RGS2, EMOS1, OM, EMOS2 |
| Temporal Coverage | 2004-07-20T11:21:43Z/2004-07-21T20:36:35Z |
| Version | 17.56_20190403_1200 |
| 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 | 2006-05-26T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "wide binary classified", "cosmic rays", "colliding wind shock", "neon abundance", "heavily absorbed", "orbital period", "hd 193793 emits", "chemical evolution", "hd 193793", "periastron passage", "rgs abundance measurement", "XMM", "xray spectrum", "wolf rayet wind", "HD 193793", "massive stars" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Yoshitomo Maeda, 2006, 'RGS Abundance Measurement of Wolf-Rayet Stellar Wind', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-tdqk5r5 |