| Proposal ID | 084268 |
| 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=0842680301 |
| DOI | https://doi.org/10.57780/esa-9m4kzsx |
| Principal Investigator, PI | Dr Bradford Wargelin |
| Abstract | With the advent of large-scale optical photometric monitoring and exoplanetsearch programs, the number of stars with known stellar cycles has rapidlygrown. In parallel, advances in theoretical modeling are leading to a revolutionin our understanding of stellar structure and magnetic field generation inlate-type stars. Still, many questions remain, and new puzzles have arisen, suchas the existence of cycles in fully convective stars. X-ray emission is a keydiagnostic of stellar magnetic activity, and X-ray cycle amplitudes are muchlarger than in the optical, but of the hundreds of stars with confirmed cycles,only seven have been monitored in X rays. We request XMM-Newton observations ofthree stars that will significantly broaden the X-ray perspective on stellar cycles. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2019-11-18T06:14:40Z/2019-12-09T11:13:12Z |
| Version | 18.00_20191217_1110 |
| 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 | 2021-01-04T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "key diagnostic", "stellar magnetic activity", "convective stars", "stellar cycles", "xmm newton", "magnetic field generation", "xray perspective", "exoplanet search programs", "XMM-Newton", "late type stars", "scale optical photometric", "xray emission", "XMM", "stellar structure", "xray cycle amplitudes" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Bradford Wargelin, 2021, 'The X-Ray View of Stellar Cycles', 18.00_20191217_1110, European Space Agency, https://doi.org/10.57780/esa-9m4kzsx |