We propose to continue monitoring three fields containing a total of fivelate-type stars for long-term variability. The stars are 61 Cyg A and B, HD 81809, all of which are being monitored for Ca emission, with 61 Cyg A andHD 81809 having cyclic activity changes, and Alpha Cen A and B, the nearestsolar-like star. All of these stars are known X-ray sources, which have alreadybenn monitored in XMM-Newton AO1. The overall goal of this series ofobservations is to obtain a baseline of a decade for these objects in order tocheck whether other solar -like stars show cyclic changes in their X-ray outputjust like the Sun.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2003-11-22T05:33:21Z/2005-08-17T20:34:06Z
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, 2007, 'Activity cycles and Maunder minima stars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-c9a9rrt
