| Proposal ID | 080188 |
| Title | The Stellar Cycle of Proxima Centauri |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0801880201 |
| DOI | https://doi.org/10.5270/esa-i8s2as9 |
| Principal Investigator, PI | Dr Bradford Wargelin |
| Abstract | Fifteeen years of ASAS V-band monitoring have yielded strong evidence for a 7-yrstellar cycle in Proxima Cen (dM5.5e), a fully convective star that should not,according to standard models, be able to support a magnetic activity cycle likethe Sun.s. Our analysis of Swift, Chandra, and XMM data spanning seven yearsyielded results that are consistent with the optical cycle & opposite in phase.We request four 20-ks observations to extend X-ray cycle monitoring and providehigh quality spectra to compare emission characteristics at cycle maximum andmidpoint. These observations, with their high event rates and excellent timingresolution, will also be used in a novel study of microflaring, as well as ex-amination of flare spectra and dynamics to derive coronal physical properties. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2017-07-27T12:21:09Z/2018-03-12T02:40:57Z |
| Version | 17.56_20190403_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 | 2019-04-02T22:00:00Z |
| Keywords | "flare spectra", "yr stellar cycle", "xmm data spanning", "XMM", "proxima centauri", "ex amination", "coronal physical properties", "magnetic activity cycle", "event rates", "compare emission characteristics", "cycle maximum", "stellar cycle", "convective star", "optical cycle", "standard models", "xray cycle", "proxima cen dm5", "quality spectra" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Bradford Wargelin, 2019, 'The Stellar Cycle of Proxima Centauri', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-i8s2as9 |