We propose the first detailed X-ray study of the hierarchical triple system HD181068. As revealed by Kepler observations and subsequent ground basedfollow-up, this triple system consists of a G-type giant primary, orbited by aclose binary once every 45 days. The close binary hosts two dwarfs orbiting eachother with a period of 0.9 days. All components of the triple system eclipseeach other. HD 181068 is a RASS X-ray source with an X-ray luminosity in excessof 10e31 erg/s. We propose to carry out a pilot study with two XMM-Newtonpointings of 10 ks and 50 ks duration to attribute the X-ray flux to theindividual triple-system components, characterize the X-ray spectrum in depth,and assess the feasibility of more detailed follow-up studies.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2013-05-03T04:03:10Z/2013-05-19T18:24:45Z
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.
European Space Agency, Dr Stefan Czesla, 2014, 'Unraveling the mysterious hierarchical triple system HD 181068', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-86zkzbm
