| Proposal ID | 088380 |
| Title | Testing the steep decline in chromospheric emission of very late M dwarfs |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0883800101 |
| DOI | https://doi.org/10.57780/esa-esnyv3o |
| Principal Investigator, PI | Prof Peter Wheatley |
| Abstract | We recently published evidence for a steep decline in chromospheric ultravioletemission compared with coronal X-ray emission for mid-to-late M dwarfs. Verylate M dwarfs appear to be underluminous in the ultraviolet by two orders ofmagnitude. If confirmed, this chromospheric decline will have profoundimplications for the habitability of exoplanet systems similar to TRAPPIST-1.The chromospheric decline may also point to a change in stellar dynamo mechanismat the fully convective boundary. We propose XMM-Newton and HST observations ofthree very late M dwarfs in order to test that the chromospheric decline is acommon feature of the class. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2021-06-24T14:34:06Z/2022-02-22T18:30:21Z |
| Version | 19.17_20220121_1250 |
| 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 | 2023-03-22T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "chromospheric emission", "chromospheric ultraviolet emission", "stellar dynamo mechanism", "convective boundary", "xmm newton", "published evidence", "XMM-Newton", "profound implications", "chromospheric decline", "coronal xray emission", "XMM", "exoplanet systems", "HST" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Peter Wheatley, 2023, 'Testing the steep decline in chromospheric emission of very late M dwarfs', 19.17_20220121_1250, European Space Agency, https://doi.org/10.57780/esa-esnyv3o |