A dataset provided by the European Space Agency

Name 020136
Title ARE MAGNETIC EARLY-TYPE STARS INTRINSIC X-RAY EMITTERS?
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0201360201

DOI https://doi.org/10.5270/esa-8av6ebq
Author European Space Agency
Description We propose to observe 2 magnetic early-type stars (56 Tau and nu Sco CD) that
were previously detected as X-ray sources by ROSAT and as nonthermal radio
sources by the VLA, so as to obtain well-exposed EPIC spectra and lightcurves.
We will analyze their spectra for evidence for or against the hypothesis that
the X-ray emitting plasma is intrinsic to the magnetic star (as opposed to being
coronal emission from unresolved low-mass stellar companions), e.g., by
comparing the inferred coronal elemental abundances to the peculiar Si-rich
abundances of the magnetic stars. photospheres. We will also study the X-ray
lightcurves of the 2 stars compared to their magnetic field variations and to
their simultaneous radio light curves as a further test of the intrinsic vs. extrinsic hypothesis.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2004-02-29T20:04:59Z/2004-03-01T08:01:37Z
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 2005-05-01T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2005, Are Magnetic Early-Type Stars Intrinsic X-Ray Emittersquestionmark, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-8av6ebq