| Name | 084268 |
| Title | The X-Ray View of Stellar Cycles |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0842680301 |
| DOI | https://doi.org/10.57780/esa-9m4kzsx |
| Author | Dr Bradford Wargelin |
| Description | With the advent of large-scale optical photometric monitoring and exoplanet search programs, the number of stars with known stellar cycles has rapidly grown. In parallel, advances in theoretical modeling are leading to a revolution in our understanding of stellar structure and magnetic field generation in late-type stars. Still, many questions remain, and new puzzles have arisen, such as the existence of cycles in fully convective stars. X-ray emission is a key diagnostic of stellar magnetic activity, and X-ray cycle amplitudes are much larger 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 of three stars that will significantly broaden the X-ray perspective on stellar cycles. |
| Publication | No observations found associated with the current proposal |
| 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 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 | 2021-01-04T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2021-01-04T00:00:00Z, 084268, 18.00_20191217_1110. https://doi.org/10.57780/esa-9m4kzsx |