XMM-Newton pointings on 2 late-type G/K supergiants in the outskirts of thecoronal graveyard will explore the midrange of X-ray activity in evolvedlate-type stars. Our ambition is to gain insight into magnetic field generationin the absence of sensible rotation, and the disposition of hot coronalstructures in the extended outer envelopes of these objects, possibly partiallysmothered beneath a cool absorber. Such buried activity might be the longsought initiator of chromospheric winds in the giant branch. The project willcapture two promising candidates from UV and X-ray flux limited samplesidentified in the ROSAT era. Understanding the broad reaches of coronalactivity, and its evolution, are key objectives of cool star astrophysics.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2007-09-23T07:18:07Z/2008-03-04T20:09:32Z
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.
European Space Agency, Dr Thomas Ayres, 2009, 'STRIP-MINING THE CORONAL GRAVEYARD', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-joia0js
