| Proposal ID | 050193 |
| Title | Activity cycles in solar analog stars |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0501930401 |
| DOI | https://doi.org/10.5270/esa-n3lveka |
| Principal Investigator, PI | Dr Fabio Favata |
| Abstract | A program to detect and study for the first time solar-like cyclic behavior inthe X-ray emission of stars similar to our Sun has been ongoing since XMM sAO-1. Five targets in three stellar systems have been monitored since 2000,providing for the first time evidence of long-term cyclic behavior in the X-rayluminosity of normal stars, with variations in X-ray luminosity of up to anorder of magnitude. The present proposal requests continuation of the ongoingmonitoring program into XMM AO-6, needed to progress toward the completeobservation of at least one stellar activity cycle for our targets. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2007-11-03T13:09:29Z/2008-05-15T04:20:05Z |
| 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 | 2009-06-19T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "activity cycles", "time solar", "time evidence", "stellar systems", "solar analog stars", "normal stars", "xray emission", "XMM", "term cyclic", "stellar activity cycle", "xray luminosity", "xmm ao" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Fabio Favata, 2009, 'Activity cycles in solar analog stars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-n3lveka |