A dataset provided by the European Space Agency

Name 002175
Title Hybrid Stars and Coronal Evolution


DOI https://doi.org/10.5270/esa-apviqq1
Author Dr Andrea Dupree
Description To construct a comprehensive picture of coronal evolution we propose to obtain XMM 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 and form the critical connecting link between coronal stars (with hot coronae and low mass loss rates) and the Alpha-Ori type objects (with cool coronae and massive winds). XMM spectra will yield emission measures from line-based analyses, electron densities, the size of the corona, and evidence (or not) for a coronal enhancement of abundances (FIP effect).
Publication No observations found associated with the current proposal
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 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 2003-12-04T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2003-12-04T00:00:00Z, 002175, 17.56_20190403_1200. https://doi.org/10.5270/esa-apviqq1