| Name | 074402 |
| Title | The puzzling activity cycle of the planet host star iota Hor |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0744020301 |
| DOI | https://doi.org/10.5270/esa-spdsab6 |
| Author | European Space Agency |
| Description | The discovery of a coronal cycle in iota Hor represents the shortest observed to date, in good agreement with chromospheric observations. A longer term trend seems to modulate the outcome of the 1.6 yr cycle. The most recent data could indicate that the minimum of a long term cycle has been reached and the activity could be increasing in the next years. This might offer the unique possibility to observe for the first time a double coronal cycle similar to those observed in the chromosphere of other stars. The iota Hor cycle might be the paradigm of the first activity cycles in the life of a solar-like star; besides, a jovian planet orbits the star at 0.9 a.u. We intend to complete the coverage of a new coronal cycle, and to monitor the interplay with a possible longer term cycle. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2014-05-18T00:55:36Z/2015-02-06T18:27:07Z |
| Version | 17.56_20190403_1200 |
| 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 | 2016-02-23T23:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2016, The Puzzling Activity Cycle Of The Planet Host Star Iota Hor, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-spdsab6 |