| Proposal ID | 080338 |
| Title | The puzzling activity cycle of the planet host star iota Hor |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0803380301 |
| DOI | https://doi.org/10.5270/esa-uyorsz0 |
| Principal Investigator, PI | Dr Jorge Sanz-Forcada |
| Abstract | The discovery of a coronal cycle in iota Hor represents the shortest observed todate, in good agreement with chromospheric observations. A longer term trendseems to modulate the 1.6 yr cycle only in the chromosphere. As Hor is the onlysingle star where this behavior have ever been observed, it is critical tocontinue with our monitoring. The legacy value of this campaign is guaranteed,as it provides valuable constraints for models of magnetic field generation inyoung Sun-like stars. The iota Hor cycle might be the paradigm of the firstactivity cycles in the life of a solar-like star; besides, a jovian planetorbits the star at 0.9 a.u. We intend to conclude our program extending thecoverage of the new cycle, to confirm (or reject) the coupling between both activity tracers. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2017-05-20T11:14:43Z/2018-02-03T09:54:14Z |
| Version | PPS_NOT_AVAILABLE |
| 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 | 2019-02-15T23:00:00Z |
| Keywords | "magnetic field generation", "coronal cycle", "iota hor cycle", "star iota hor", "single star", "valuable constraints", "jovian planet orbits", "yr cycle", "term trend", "activity tracers", "activity cycle", "activity cycles", "iota hor represents" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Jorge Sanz-Forcada, 2019, 'The puzzling activity cycle of the planet host star iota Hor', PPS_NOT_AVAILABLE, European Space Agency, https://doi.org/10.5270/esa-uyorsz0 |