A large number of rotation periods for low mass stars has become available now.In addition to the long known rapid rotators, a population of slowly rotating Mdwarfs with rotation periods above 100 days has been identified. These slowrotators pose a challenge for the cool star rotation activity paradigm, sinceabout a third of the sample is detected as RASS sources near the the saturationlimit for cool stars LX/Lbol virgul 10**-3 and hence belong to the most active stars.We propose XMM follow-up of a sample of very slow rotators undetected in theRASS to study the rotation-activity relation for such low mass objects and RGSspectroscopy of GJ699 to study the universality of the surface flux-coronaltemperature relation at the very lowest known levels of X-ray activity.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2018-04-19T10:19:50Z/2019-04-22T09:55:56Z
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, Prof Juergen Schmitt, 2020, 'The rotation-activity connection for low mass stars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-syzu2sd
