A dataset provided by the European Space Agency

Name: Properties of X-ray activity cycles on young solar-like stars: epsilon Eridanae
Published: 2021-02-13T00:00:00Z
License: https://creativecommons.org/licenses/by-nc/3.0/igo

Proposal ID	084345
Title	Properties of X-ray activity cycles on young solar-like stars: epsilon Eridanae
Download Data Associated to the proposal	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/10.57780/esa-wjebei2
Principal Investigator, PI	Prof Beate Stelzer
Abstract	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.
Publications	Characterizing X-ray activity cycles of young solar-like stars with solar observations \|Coffaro Martina Stelzer Beate \| AN \| 343-10066 \| 2022 \| 2022AN....34310066C \| http://ui.adsabs.harvard.edu/#abs/2022AN....34310066C A multi-wavelength view of the multiple activity cycles of u03f5 Eridani \|Fuhrmeister B. Coffaro M. et al. \| A&A \| 672-149 \| 2023 \| 2023A&A...672A.149F \| http://ui.adsabs.harvard.edu/#abs/2023A&A...672A.149F The XMM-Newton Line Emission Analysis Program (X-LEAP). I. Emission-line Survey of O VII O VIII and Fe L-shell Transitions \|Pan Zeyang Qu Zhijie et al. \| ApJS \| 271-62 \| 2024 \| 2024ApJS..271...62P \| http://ui.adsabs.harvard.edu/#abs/2024ApJS..271...62P
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2019-07-19T06:44:25Z/2020-01-19T14:09:50Z
Version	21.51_20241115_1113
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.
Creator Contact	https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published	2021-02-13T00:00:00Z
Last Update	2026-07-09
Keywords	"chromospheric activity level", "XMM-Newton", "shortest dynamo cycles", "continued ca ii", "spt g0v", "xray cycle", "iota hor 600myr", "star resembling", "xray activity cycles", "XMM", "anticipated rise phase", "xmm newton", "xray variability correlated", "short calcium cycle", "xmm newton measurements"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Prof Beate Stelzer, 2021, 'Properties of X-ray activity cycles on young solar-like stars: epsilon Eridanae', 21.51_20241115_1113, European Space Agency, https://doi.org/10.57780/esa-wjebei2
Rights	Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.