We propose to continue our XMM-Newton monitoring of the young solar analogepsilon Eri. So far only one X-ray cycle has been found on a star resembling theyoung Sun, iota Hor (600Myr, SpT G0V). Its X-ray cycle is remarkably one of theshortest dynamo cycles known to date (1.6 yrs), the only X-ray cycle identifiedso far on a star with high chromospheric activity level. Our target, epsilon Eriresembles iota Hor (young age, short calcium cycle, high activity), and ourXMM-Newton measurements since AO14 suggest X-ray variability correlated with theknown 3-yr Ca II cycle, possibly with an anticipated rise phase during the lastcycle. We ask for two snapshots in AO18 (2 x 5 ksec) to be combined with ourprevious data and the continued Ca II monitoring of the star.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2019-07-19T06:44:25Z/2020-01-19T14:09:50Z
Version
18.01_20200110_1700
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 Beate Stelzer, 2021, 'Properties of X-ray activity cycles on young solar-like stars\: epsilon Eridanae', 18.01_20200110_1700, European Space Agency, https://doi.org/10.57780/esa-wjebei2
