We propose to obtain XMM-Newton snapshots of a sample of five G-type superflarestars spanning a wide range of rotation periods identified by the Keplersatellite. While the strongest solar flares release about 10^32 erg, Keplerobserved G-type dwarfs producing white-light flares releasing up to four ordersof magnitude more energy---eruptions capable of inflicting serious damage on theequilibrium of a planetary atmosphere. Curiously, many of these superflare starsare apparently slow rotators. Thus, they challenge the canonicalrotation-activity relation. The analysis of the coronal X-ray emission from oursample of superflare stars with highly diverse rotation periods will allow us totest the activity-rotation paradigm in these intriguing stars.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2014-04-21T03:32:48Z/2014-06-06T16:52:36Z
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 Stefan Czesla, 2015, 'Challenging the rotation-activity paradigm', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-hdx86cb
