We propose to pursue a long-term monitoring program of a selection of solar-typestars all of which show clear to the solar cycle -- in their CaII flux, with theaim of detecting and studying, for the first time in X-rays, the presence ofactivity cycles in stars other than the Sun. Thus far only very active stars --not show CaII cycles but only irregular variability -- have monitored with asufficient time base in X-rays, with no evidence for cycles. XMM makes itpossible, for the first time, to efficiently monitor the low-activity, cyclicstars which are the true analogues of thus to effectively constrain thecharacteristics of the cycles on stars other than the Sun.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2017-05-01T05:16:54Z/2018-04-27T01:07:33Z
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 Fabio Favata, 2019, 'Coronal activity cycles in solar analog stars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ckryrvu
