|Title||Properties of X-ray activity cycles on young solar-like stars: epsilon Eridanae|
|Author||Prof Beate Stelzer|
|Description||We propose to continue our XMM-Newton monitoring of the young solar analog epsilon Eri started in AO 14. So far only one X-ray cycle has been found on a star resembling the young Sun, iota Hor (600Myr, SpT G0V). Its X-ray cycle is remarkably one of the shortest dynamo cycles known to date (1.6 yrs), the only X-ray cycle identified so far on a star with high chromospheric activity level, and episodically interrupted. Our target, Epsilon Eri resembles iota Hor (young age, short calcium cycle, high activity) and our observations aim at establishing whether the peculiar features of iota Hor.s X-ray cycle are characteristic for such young stars. We ask for two snapshots in AO17, for a total of 10ksec to be combined with our previous data and the continued Ca II monitoring program of epsilon Eri.|
|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, 2020-02-11T23:00:00Z, 082007, 17.56_20190403_1200. https://doi.org/10.5270/esa-eazkxlo|