A dataset provided by the European Space Agency

Name 065187
Title AK Sco: enhanced magnetic activity in a pre-main sequence interacting binary


DOI https://doi.org/10.5270/esa-40d6y90
Author Prof Ana I. Gomez de Castro
Description AK Sco is a unique source: a virgul10 Myr old pre-main-sequence (PMS) spectroscopic binary composed of two nearly equal F5 stars that at periastron are separated by barely 11 stellar radii. The orbit is not yet circularized (e = 0.47) and very strong tides are expected. Previous high resolution UV spectroscopic observations carried out with the HST-STIS have shown that there is an extended region with plasma at logTe (K)=4.8 reaching 1.7R*. The magnetic diffusivity in this region is very small; unusually strong tidally modulated polarimetric variations of the system have been detected suggesting a strong coupling between gravitational tides and the stellar field. We propose to study the variation of the X-ray-UV spectrum of AK Sco as the stellar magnetospheres are modified by the tide.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2011-03-15T21:03:32Z/2011-03-22T21:18:45Z
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 2012-04-12T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2012-04-12T00:00:00Z, 065187, 17.56_20190403_1200. https://doi.org/10.5270/esa-40d6y90