The present program to study for the first time solar-like cycles in the X-rayemission of stars similar to our Sun has been ongoing since XMM s AO-1. Fivetargets in three stellar systems have been monitored at regular cadence for afull decade, providing for the first time clear evidence of long-term cycles inthe coronal activity of normal stars, with cycle amplitudes of up to an order ofmagnitude in X-ray luminosity. The present proposal requests continuation of theongoing monitoring program into XMM AO-11, needed to progress toward fullcharacterization of the coronal cycle for our targets and the understanding ofthe cycle-to-cycle variations.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2012-06-07T00:38:40Z/2013-04-29T13:09:55Z
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, 2014, 'Coronal cycles in Solar-type stars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-gtbbx50
