| 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 | 21.51_20241115_1113 |
| 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 | 2026-07-09 |
| Keywords | "marked decline", "XMM-Newton", "objects display", "revealing evidence", "coronal activity past", "XMM", "spectral type", "low mass stars", "xray spectra", "m8 dwarf vb", "coronal heating mechanism", "coronal heating efficiencies", "low mass dwarfs", "xray detections", "xray investigations", "spectral distribution", "coronal plasma", "sleuthing xray emission", "low coronal temperatures", "hot coronal plasma", "M7", "xmm newton" |
| 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', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-xlhmuil |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |