| Proposal ID | 088216 |
| Title | The X-Ray View of Stellar Cycles |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0882160401 |
| DOI | https://doi.org/10.57780/esa-ovbh9if |
| Principal Investigator, PI | Dr Bradford Wargelin |
| Abstract | With the advent of large-scale optical monitoring and exoplanet search programs,the number of stars with known stellar cycles is growing rapidly. In parallel,advances in theoretical modeling are revolutionizing our understanding ofmagnetic field generation in late-type stars. Many questions remain, however,and new puzzles have arisen, such as the discovery of cycles in fully convectivestars. X-ray emission is a powerful diagnostic of stellar magnetic activity,with cycle amplitudes that are much larger and often more regular than in otherwavebands. Of the hundreds of stars with confirmed cycles, however, only 8 havebeen monitored in X rays. We request XMM observations of two stars that willsignificantly broaden the X-ray perspective on stellar cycles. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2021-05-20T01:31:38Z/2021-11-11T15:23:23Z |
| Version | 19.16_20210326_1200 |
| 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 | 2022-12-01T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "stellar magnetic activity", "powerful diagnostic", "convective stars", "stellar cycles", "magnetic field generation", "xray perspective", "late type stars", "exoplanet search programs", "xray emission", "XMM", "scale optical", "cycle amplitudes" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Bradford Wargelin, 2022, 'The X-Ray View of Stellar Cycles', 19.16_20210326_1200, European Space Agency, https://doi.org/10.57780/esa-ovbh9if |