We propose X-ray observations of nearby M-type dwarfs hosting low-massextra-solar planets, recently discovered in the framework of a radial velocitysurvey with HARPS-N@TNG. In particular, we propose a pilot observation of GJ3998, never observed at X-ray wavelengths, which harbors two super-Earths atclose distances from the central star, whose transits will be probed by Spitzerin the next months. For two more targets we require X-ray spectral and timevariability analysis to characterize the dose of high-energy radiation receivedby the newly discovered planets, to be employed for follow-up studies of theplanetary atmospheres. A crucial ingredient for such studies is the X-rayradiation flux, and more in general an assessment of the activity level of the host stars.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2017-05-25T07:49:55Z/2018-01-17T20:29:44Z
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 Antonio Maggio, 2019, 'X-ray chracterization of M-type dwarfs hosting super-Earth planets', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-1ygq91m
