A program to detect and study for the first time solar-like cyclic behavior inthe X-ray emission of stars similar to our Sun has been ongoing since XMM sAO-1. Five targets in three stellar systems have been monitored since 2001,providing for the first time clear evidence of long-term cycles in the X-rayluminosity of normal stars, with variations in X-ray luminosity of up to anorder of magnitude. The present proposal requests continuation of the ongoingmonitoring program into XMM AO-7, needed to progress toward full confirmation ofthe coronal cycle and a well constrained determination of its period for ourtargets.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2008-07-30T04:00:32Z/2009-04-27T11:18:19Z
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, 2010, 'Coronal activity cycles in solar analog stars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-mok8o3f
