A dataset provided by the European Space Agency

Name 084345
Title Properties of X-ray activity cycles on young solar-like stars: epsilon Eridanae
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0843450301
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0843450401

DOI https://doi.org/10.5270/esa-[xxxxxxx]
Author Prof Beate Stelzer
Description We propose to continue our XMM-Newton monitoring of the young solar analog epsilon Eri. 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. Our target, epsilon Eri resembles iota Hor (young age, short calcium cycle, high activity), and our XMM-Newton measurements since AO14 suggest X-ray variability correlated with the known 3-yr Ca II cycle, possibly with an anticipated rise phase during the last cycle. We ask for two snapshots in AO18 (2 x 5 ksec) to be combined with our previous data and the continued Ca II monitoring of the star.
Publication No observations found associated with the current proposal
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 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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2021-02-13T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2021-02-13T00:00:00Z, 084345, 18.01_20200110_1700. https://doi.org/10.5270/esa-[xxxxxxx]