A dataset provided by the European Space Agency

Name 086020
Title X-ray emission of ultracool dwarfs across the radio-loud - radio-quiet boundary
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0860200101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0860200201
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0860200301
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0860200401

DOI https://doi.org/10.5270/esa-[xxxxxxx]
Author Prof Beate Stelzer
Description Ongoing studies of magnetic activity at the end of the stellar main-sequence have revealed an emerging dichotomy in the X-ray and radio properties. The hetero- geneous properties of ultracool dwarfs (spectral type M7 and later) display either strong coronal-like X-rays with low radio luminosities or predominantly planet-like strong radio emissions with weak X-ray luminosities. This bifurcation is likely driven by the properties of the magnetic field and the stellar rotation. We will explicitly test this hypothesis by filling the parameter space with a TESS-selected sample: The new TESS rotation period will be complemented here with both radio and X-ray data spanning the rotation period threshold across which the dichotomy appears.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2020-06-22T23:51:37Z/2020-11-19T00:45:24Z
Version 18.02_20200221_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 2021-12-18T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2021-12-18T00:00:00Z, 086020, 18.02_20200221_1200. https://doi.org/10.5270/esa-[xxxxxxx]