|Title||X-ray activity at the low-mass end of the main-sequence|
|Author||Dr Beate Stelzer|
|Description||We propose to embark upon a systematic investigation of X-ray activity on field stars and brown dwarfs at the spectral type M-L transition and beyond using sensitive XMM-Newton observations. The aim of this study is to examine the nature and efficiency of stellar dynamos at the bottom of the main-sequence. For this purpose we carefully selected a sample of ultra-cool dwarfs (spectral type M7 and later) which are nearby (within 15 pc) and known to sustain a chromosphere (Halpha emission has been detected). These characteristics make our targets most promising in a search for X-ray emission.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2007-03-11T00:00:00Z, 030017, 17.56_20190403_1200. https://doi.org/10.5270/esa-6e739a2|