A dataset provided by the European Space Agency

Name 074390
Title The nature of magnetic activity at the low-mass end of the main-sequence


DOI https://doi.org/10.5270/esa-1iq6ir0
Author Dr Beate Stelzer
Description We propose XMM-Newton observations of 4 carefully selected ultracool dwarfs (UCDs), supported by EVLA monitoring, to systematically investigate magnetic activity near the spectral type M-L transition. Our targets are nearby (< 20pc), known to maintain magnetic fields (direct field detections), they yield evidence for chromospheres (Halpha emission) and have known rotation rate (v sini). This allows us to study the connection between chromospheric and coronal activity, their relation with rotation, and possibly study flares at the bottom of the main-sequence. In AO11 only two objects, both slowly rotating, were observed. For AO13 we focus on fast rotators. A statistical and unbiased sample is needed to test our hypothesis of two populations of UCDs with distinct radio-X-ray-rotation properties.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2014-09-01T19:26:54Z/2015-03-17T15:14:09Z
Version 17.56_20190403_1200
Mission Description The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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 2016-04-08T22:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2016-04-08T22:00:00Z, 074390, 17.56_20190403_1200. https://doi.org/10.5270/esa-1iq6ir0