| Proposal ID | 020261 |
| Title | ACTIVITY CYCLES AND MAUNDER MINIMA STARS |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0202610401 |
| DOI | https://doi.org/10.5270/esa-2emte69 |
| Principal Investigator, PI | Dr FABIO FAVATA |
| Abstract | We propose to continue an ongoing long-term monitoring program of a selection ofsolar-type stars to search for cyclic behavior -- analogous to the solar cycle-- in their X-ray emission. These stars have moderate levels of activity and arethus solar analogs. XMM makes it possible, for the first time, toefficiently monitor the low-activity, cyclic stars which are the true analoguesof the Sun, and thus to effectively constrain the characteristics of the cycleson stars other than the Sun. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2004-11-09T19:16:08Z/2007-02-09T14:34:19Z |
| 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 | 2008-03-30T00:00:00Z |
| Last Update | 2025-08-04 |
| Keywords | "XMM", "effectively constrain", "solar type stars", "solar cycle", "activity cycles", "cyclic stars", "xmm makes", "maunder minima stars", "moderate levels", "low activity", "xray emission" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr FABIO FAVATA, 2008, 'ACTIVITY CYCLES AND MAUNDER MINIMA STARS', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-2emte69 |