A dataset provided by the European Space Agency

Proposal ID 006975
Title Spectral Diagnostics of the Hot Plasma in the Stellar Wind of epsilon CMa
Download Data Associated to the proposal

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0069750101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0069750201
DOI https://doi.org/10.5270/esa-1o6i8l9
Principal Investigator, PI Dr David Cohen
Abstract We propose using RGS spectra of epsilon CMa (B2 II) to address several outstand-ing questions about the X-ray production mechanism in hot-star winds. These include: (1) Can self-excited instabilities produce shock emission consistent with observations or are clump-clump collisions required (2) What are the temp-erature and density distributions in the shocked plasma, and what type of wind dynamics are required to produce these distributions (3) What is the spatial distribution of the shocked plasma, and what is the impact of the X-rays on the ambient wind And (4) how variable are the properties of the individual spectral features and the physical properties which they diagnose. Epsilon CMa has a normal wind, and is the only hot star for which EUVE SW spectra exist.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2001-03-19T09:38:22Z/2001-03-20T01:10:35Z
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 2002-06-01T00:00:00Z
Keywords "density distributions", "hot plasma", "spectral diagnostics", "ambient wind", "temp erature", "clump clump collisions", "xray production mechanism", "stellar wind", "hot star winds", "outstand ing", "normal wind", "individual spectral", "shock emission", "spatial distribution", "wind dynamics", "physical properties", "shocked plasma", "epsilon cma", "hot star", "rgs spectra", "self excited instabilities"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr David Cohen, 2002, 'Spectral Diagnostics of the Hot Plasma in the Stellar Wind of epsilon CMa', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-1o6i8l9