We will study how coronal structure changes as a function of rotation rate byobtaining RGS and EPIC spectra for a sample of essentially identical, nearby(within 50 pc), Pleiades-age K dwarfs. Our targets (HD220140 2.76d, HD1744290.95d, HD17925 6.6d, and HD82443 5.4d), plus stars already observed,cover therotation period range from 0.5 to 6.6 days,and thus sample both the saturatedand linearly-dependent portions of the coronal rotation-activity relation. Wewill measure coronal temperature/emission measure distributions, elementalabundances, and electron densities, investigate the coronal energy budget andhow it relates to TR properties, and combine our results with those for other Kdwarfs (e.g.AB Dor) to understand how activity level controls coronal structure.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2003-12-27T19:22:54Z/2004-04-08T08:23:39Z
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 ALEXANDER BROWN, 2006, 'THE DEPENDENCE OF CORONAL STRUCTURE ON STELLAR ROTATION USING YOUNG K DWARFS', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-q2tdnxs
