|Calibrating the time-evolution of the high-energy emission of M stars
|Dr Beate Stelzer
|We aim at the detection of the quiescent X-ray emission from the M dwarf LP617-34, as invaluable calibration point for the activity-age relation of M dwarfs at the faint-old end. Analogous to our previous targets, LP617-34 is a wide companion to a white dwarf (WD), and we infer the age of the M dwarf (7.7 Gyr) from the progenitor and cooling age of the WD. Our target is the oldest known of such systems, and the only remaining one at &amp;gt;5Gyr that can be resolved with XMM-Newton (separation virgul 22). Transient X-ray emission was detected from the M dwarf during an XMM-Newton slew but its quiescent emission is required to constrain the activity - age relation, which is key for understanding stellar dynamos and the irradiation of planet atmospheres with high-energy photons.
|No observations found associated with the current proposal
|EMOS1, EMOS2, EPN, OM, RGS1, RGS2
|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
|European Space Agency, 2019, 080005, 17.56_20190403_1200. https://doi.org/10.5270/esa-o0r4cto