| Proposal ID | 006694 |
| Title | The coronae of very low mass stars and brown dwarfs in NGC 2547 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0066940101 |
| DOI | https://doi.org/10.5270/esa-2ox8hmf |
| Principal Investigator, PI | Dr Robin Jeffries |
| Abstract | We propose a deep EPIC observation of the very young, rich open cluster NGC 2547(isochrone age 14+/-4 Myr). We will construct uncensored X-ray luminosityfunctions for optically selected samples of ~100 very low mass stars (<0.4Msun)and attempt to detect X-ray emission from the 25-30 brown dwarf candidateswithin the EPIC field at a diagnostically important sensitivity. NGC 2547 is thebest cluster with which to test the activity-rotation-age paradigm in young,pre-main sequence stars with different structural properties to ZAMS stars. Wewill deduce whether an interface between radiative and convective zones isinfluential in the magnetic dynamo process, and probe the nature of the dynamoat the lowest masses and saturation effects at low Rossby numbers. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2002-04-02T23:10:18Z/2002-04-03T13:21:24Z |
| 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 | 2003-05-16T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "convective zones", "brown dwarf candidates", "EPIC", "lowest masses", "ngc 2547", "epic field", "deep epic", "NGC 2547", "structural properties", "low rossby", "saturation effects", "zams stars", "xray emission", "magnetic dynamo process", "low mass stars", "brown dwarf" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Robin Jeffries, 2003, 'The coronae of very low mass stars and brown dwarfs in NGC 2547', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-2ox8hmf |