| Name | 080005 |
| Title | Calibrating the time-evolution of the high-energy emission of M stars |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0800050101 |
| DOI | https://doi.org/10.5270/esa-o0r4cto |
| Author | Dr Beate Stelzer |
| Description | 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 >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. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2018-01-12T06:02:40Z/2018-01-12T19:47:18Z |
| 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 | 2019-01-29T23:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Beate Stelzer, 2019, 080005, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-o0r4cto |