|Title||Creating a gold-standard sample of ages and activity for old cool stars|
|Author||Dr Katja Poppenhaeger|
|Description||We aim to develop an age-activity calibration for old cool stars; these are the stars around which we detect the majority of all extrasolar planets. We propose to observe 8 stars for which we have already derived well-determined ages through asteroseismology, and propose to perform XMM EPIC observations to determine their X-ray luminosities. The ultimate aim is to measure activity (in X-ray, UV, and optical) as well as rotation properties for these gold-standard sample stars to assess the natural scatter of these properties versus age and derive a reliable ageing formula for stars. We ask for a total observing time of 135 ks with XMM, plus 30 ks with Chandra for a source that would otherwise be blended with a neighbouring star in XMM.|
|Publication||An improved age-activity relationship for cool stars older than a gigayear . Booth, R. S., Poppenhaeger, K., et all. . MNRAS . 471-1012 . 2017 . 2017MNRAS.471.1012B ,
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2016-12-29T23:00:00Z, 076156, 17.56_20190403_1200. https://doi.org/10.5270/esa-3spag5t|