| Proposal ID | 050401 |
| Title | Sleuthing X-ray Emission in Very Low Mass Dwarfs: Spectroscopy of VB 10 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0504010101 |
| DOI | https://doi.org/10.5270/esa-xlhmuil |
| Principal Investigator, PI | Dr Rachel Osten |
| Abstract | The bulk of very low mass stars with X-ray detections in quiescence show amarked decline in chromospheric and coronal activity past a spectral type of M7,some objects display these emissions, suggesting a decrease in chromospheric andcoronal heating efficiencies. Previous X-ray investigations have focussed mostlyon detections, revealing evidence for low coronal temperatures. Yet, amongactive and inactive earlier spectral type M dwarfs, X-ray spectra show thepresence of hot coronal plasma, thought to be related to the unknown coronalheating mechanism. We propose an observation with XMM-Newton to investigate thespectral distribution of coronal plasma in the M8 dwarf VB 10 as a way toconstrain the coronal heating processes taking place in very low mass dwarfs. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2008-04-06T12:14:52Z/2008-04-07T06:09:27Z |
| 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 | 2009-06-05T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "marked decline", "xmm newton", "coronal plasma", "low coronal temperatures", "objects display", "hot coronal plasma", "XMM", "spectral type", "xray spectra", "low mass stars", "coronal heating mechanism", "coronal activity past", "XMM-Newton", "sleuthing xray emission", "revealing evidence", "xray investigations", "low mass dwarfs", "spectral distribution", "xray detections", "m8 dwarf vb", "M7", "coronal heating efficiencies" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Rachel Osten, 2009, 'Sleuthing X-ray Emission in Very Low Mass Dwarfs: Spectroscopy of VB 10', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-xlhmuil |