A dataset provided by the European Space Agency

Name 020155
Title AN XMM STUDY OF THE BISTABILITY JUMP IN THE STELLAR WINDS OF B ERGIANTS
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0201550101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0201550201
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0201550301

DOI https://doi.org/10.5270/esa-gdvcuk8
Author Dr WAYNE WALDRON
Description The stellar winds of B supergiants (SGs) go through a discontinuous jump in their terminal velocities and mass loss rates at spectral type B1 which is referred to as the bistability of B SGs. Since wind shocks produce the X-ray emission and are highly dependent on the stellar wind parameters, B SGs provide a natural laboratory to study the relationship between the radiative force, stellar wind, and X-ray emission. We are requesting EPIC-pn observations of 4 known B SG X-ray sources located at or near the bistability jump. The X-ray fluxes show a decrease, but the cause is not known. Spectral analyses of these EPIC observations will allow us to test the predictions of the stellar wind shock model.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2004-02-13T21:44:32Z/2005-03-26T15:30:00Z
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 2006-06-15T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2006-06-15T00:00:00Z, 020155, 17.56_20190403_1200. https://doi.org/10.5270/esa-gdvcuk8