| 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 |
| DOI | https://doi.org/10.57780/esa-wjebei2 |
| 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/10.57780/esa-wjebei2 |