| Proposal ID | 080005 |
| Title | Calibrating the time-evolution of the high-energy emission of M stars |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0800050101 |
| DOI | https://doi.org/10.5270/esa-o0r4cto |
| Principal Investigator, PI | Dr Beate Stelzer |
| Abstract | We aim at the detection of the quiescent X-ray emission from the M dwarfLP617-34, as invaluable calibration point for the activity-age relation of Mdwarfs at the faint/old end. Analogous to our previous targets, LP617-34 is awide companion to a white dwarf (WD), and we infer the age of the M dwarf (7.7Gyr) from the progenitor and cooling age of the WD. Our target is the oldestknown of such systems, and the only remaining one at >5Gyr that can be resolvedwith XMM-Newton (separation ~ 22). Transient X-ray emission was detected fromthe M dwarf during an XMM-Newton slew but its quiescent emission is required toconstrain the activity - age relation, which is key for understanding stellardynamos and the irradiation of planet atmospheres with high-energy photons. |
| Publications |
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| 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 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 | 2019-01-29T23:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "wide companion", "time evolution", "transient xray emission", "planet atmosphere", "quiescent emission", "invaluable calibration", "dwarf lp617", "activity age relation", "quiescent xray emission", "energy photons", "XMM-Newton", "energy emission", "stellar dynamos", "xmm newton separation", "cooling age", "XMM", "xmm newton slew", "white dwarf wd" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Beate Stelzer, 2019, 'Calibrating the time-evolution of the high-energy emission of M stars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-o0r4cto |