A dataset provided by the European Space Agency

Name 069346
Title Calibrating the time-evolution of the high-energy emissions of GKM stars


DOI https://doi.org/10.5270/esa-1l9k9uj
Author Dr Ignasi Ribas
Description 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 host stars. 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. After obtaining some unexpected results on previous AO,10, the proposed XMM-Newton observations will allow us to throw light on the behaviour of X-ray emissions along the critical intermediate-age interval (1-6 Gyr). This will be done by measuring new GKM stars in wide binary pairs with white dwarf companions that we use as chronometers to determine reliable ages. The time-variation of coronal temperature will provide additional diagnostics useful to both exoplanets and dynamo theory.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2012-08-14T09:03:18Z/2012-12-22T03:23:27Z
Version 17.56_20190403_1200
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 2014-01-15T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2014-01-15T00:00:00Z, 069346, 17.56_20190403_1200. https://doi.org/10.5270/esa-1l9k9uj