| Proposal ID | 067065 |
| Title | Calibrating the time-evolution of the high-energy emissions of GKM stars |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0670650101 |
| DOI | https://doi.org/10.5270/esa-ilduoag |
| Principal Investigator, PI | Dr Ignasi Ribas |
| Abstract | A key element to understand planetary atmospheres (Solar System and exoplanets)is the time-evolution of the flux at short wavelengths (X-ray to UV) of the hoststars, having direct impact on important questions related to photochemistry andevaporation. While the high-energy flux evolution is well understood for solar-type stars, this is not the case of the later K and M stars. The proposed XMM-Newton observations will allow us to build X-ray luminosity versus agecalibrations by sampling the critical intermediate-age interval. This is done bymeasuring KM stars in wide binary pairs with white dwarf companions that we useas chronometers to determine reliable ages. The time-variation of coronaltemperature will provide additional diagnostics useful to both exoplanets and dynamo theory. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2011-05-10T06:51:44Z/2011-12-10T18:08:41Z |
| 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 | 2012-12-22T00:00:00Z |
| Last Update | 2025-08-04 |
| Keywords | "short wavelengths xray", "solar type stars", "energy flux evolution", "time evolution", "build xray luminosity", "dynamo theory", "XMM", "km stars", "time variation", "gkm stars", "age calibrations", "wide binary pairs", "xmm newton", "key element", "coronal temperature", "white dwarf companions", "reliable ages", "energy emissions", "additional diagnostics useful", "intermediate age interval" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Ignasi Ribas, 2012, 'Calibrating the time-evolution of the high-energy emissions of GKM stars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ilduoag |