GT- FK Com stars are single G or K type giants whose distinctive characteristicsinclude strong and variable H \alpha and CaII emissions, strong UVchromospheric emission lines, quasisinusoidal optical light curves and highx-ray luminosity. Furthermore FK Comae giants exhibit large rotationalvelocities (unusual among single giants) which may govern their highchromospheric and coronal activity levels. The objective of this proposal is tomeasure the physical characteristics of the coronae of FK Com type stars (e.gtemperature, electron densities, abundances, variability) and to compare themwith those of other G-K type giants.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2000-07-09T17:13:19Z/2002-11-24T01:07:08Z
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 Fredericus Jansen, 2004, 'XMM observations of FK Comae-type giants', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-dvpe6q2
