A dataset provided by the European Space Agency

Proposal ID 030202
Title The B Supergiant Bistability-Jump in X-ray Emission
Download Data Associated to the proposal

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0302020201
DOI https://doi.org/10.5270/esa-06vtsnq
Principal Investigator, PI Dr Wayne Waldron
Abstract The stellar winds of B supergiants (SGs) go through a discontinuous jump intheir terminal velocities, mass loss rates, and X-ray emission at spectral typeB1 which is referred to as the bistability of B SG winds. Since wind shocksproduce the X-ray emission and are highly dependent on the stellar windparameters, B SGs provide a natural laboratory to study the relationship betweenthe radiative force, stellar wind, and X-ray emission. Although the drop inX-ray flux appears consistent with theoretical predictions, our AO-3 XMMobservations of 2 B SGs at the jump indicate severe problems with currenttheory. We are requesting 2 additional EPIC observations of B SGs located nearthe bistability jump to determine the extent of these problems.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2005-10-12T09:45:02Z/2005-10-13T05:38:42Z
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 2006-12-09T00:00:00Z
Keywords "bistability jump", "spectral type b1", "additional epic", "terminal velocities", "discontinuous jump", "stellar wind", "supergiants sgs", "mass loss rates", "XMM", "wind shoc", "radiative force", "natural laboratory", "xray flux appears", "EPIC", "stellar wind parameters", "supergiant bistability jump", "stellar winds", "sgs located", "xray emission", "sg winds"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Wayne Waldron, 2006, 'The B Supergiant Bistability-Jump in X-ray Emission', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-06vtsnq