We propose to perform XMM-Newton observations of two slowly rotating G giants,HD 85444 and HD 141714, for a total exposure of 158 ksec. RGS and EPIC spectrawill be used to constrain the geometry of coronal loop systems in their coronae.Results will be compared with those obtained from the analysis of XMM-Newtonspectra of rapidly rotating G giants. The study intend to test whether atransition from star-size magnetic structures to compact coronal arcades occursin the coronae of giants between slow and fast rotators.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2003-03-02T19:14:14Z/2003-03-03T04:36:14Z
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 Philippe Gondoin, 2004, 'The Coronae of G Giants', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-pizwwht
