We propose to observe the slowly rotating M3.5 type planet host star GJ 4276with XMM-Newton for 12 ks. In the frame of the CARMENES radial velocity survey,a Neptune-mass planet with one of the most eccentric orbits (e=0.38) known todate has recently been discovered around GJ 4276. The host star is close to theboundary of fully convective stars. Optical photometry shows GJ 4276 to have arotation period of 65 d, making it one of the slowest rotators known in its massrange. Our proposed XMM-Newton observation will allow us to characterize theX-ray emission of this star, put it into the context of slowly rotating Mdwarfs, and determine the irradiation level of its planet.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2019-05-27T04:41:54Z/2019-05-27T11:16:54Z
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, 2020, 'GJ 4276\: Slow rotator with eccentric planet', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-hllbygn
