Proposal ID | 002175 |
Title | Hybrid Stars and Coronal Evolution |
Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0021750101 |
DOI | https://doi.org/10.5270/esa-apviqq1 |
Principal Investigator, PI | Dr Andrea Dupree |
Abstract | To construct a comprehensive picture of coronal evolution we propose to obtainXMM spectra of a hybrid star (HD 150798) and a pre-hybrid star (HD 159181). These objects are in the warm corona/warm wind state of evolution andform the critical connecting link between coronal stars (with hot coronae andlow mass loss rates) and the Alpha-Ori type objects (with cool coronae andmassive winds). XMM spectra will yield emission measures from line-basedanalyses, electron densities, the size of the corona, and evidence (or not) fora coronal enhancement of abundances (FIP effect). |
Publications |
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Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2001-03-03T10:10:33Z/2002-10-06T15:40:18Z |
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 | 2003-12-04T00:00:00Z |
Last Update | 2025-01-27 |
Keywords | "hybrid stars", "coronal evolution", "xmm spectra", "hot coronae", "electron densities", "connecting link", "cool coronae", "emission measures", "HD 150798", "comprehensive picture", "XMM", "coronal stars", "abundance fip effect", "massive winds", "coronal enhancement" |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Dr Andrea Dupree, 2003, 'Hybrid Stars and Coronal Evolution', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-apviqq1 |