|Title||Activity cycles in solar-type stars|
|Author||Dr Fabio Favata|
|Description||We propose to pursue a long-term monitoring program of a selection of solar-type stars all of which show clear cyclic behavior -- analogous to the solar cycle -- in their CaII flux, with the aim of detecting and studying, for the first time in X-rays, the presence of activity cycles in stars other than the Sun. Thus far only very active stars -- which do not show CaII cycles but only irregular variability -- have been monitored with a sufficient time base in X-rays, with no evidence for cycles. XMM makes it possible, for the first time, to efficiently monitor the low-activity, cyclic stars which are the true analogues of|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|Mission Description||The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2004-05-28T00:00:00Z, 003234, 17.56_20190403_1200. https://doi.org/10.5270/esa-t1m7okl|