A dataset provided by the European Space Agency

Name 050473
Title Origin of the hard X-ray emission in Gamma Cas analogs: HD 110432
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0504730101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0504730201

DOI https://doi.org/10.5270/esa-jlxxsng
Author Dr Christian Motch
Description A small group of early Be stars (the class of Gamma Cas analogs) exhibit low
luminosity hard X-ray emission with Log(Lx) virgul 32-33 erg/s. Both a white dwarf
accreting from the circumstellar disc or magnetic interaction between the
photosphere and the disc can explain the unusually hard X-ray emission. The
target of the proposal, HD 110432, is after Gamma Cas itself, the X-ray
brightest member of this group and furthermore displays more marked
characteristics of this class than the prototype. We propose to obtain a RGS
spectrum of HD 110432 in order to constrain the X-ray emission mechanism using
emission line disgnostics, investigate the effect of a different disc
inclination, search for abundances anomalies and look for stable periodicities.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2007-09-04T14:55:16Z/2007-09-05T16:14:46Z
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 2008-12-02T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Christian Motch, 2008, 050473, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-jlxxsng