|Title||Unraveling the mysterious hierarchical triple system HD 181068|
|Author||Dr Stefan Czesla|
|Description||We propose the first detailed X-ray study of the hierarchical triple system HD 181068. As revealed by Kepler observations and subsequent ground based follow-up, this triple system consists of a G-type giant primary, orbited by a close binary once every 45 days. The close binary hosts two dwarfs orbiting each other with a period of 0.9 days. All components of the triple system eclipse each other. HD 181068 is a RASS X-ray source with an X-ray luminosity in excess of 10e31 erg-s. We propose to carry out a pilot study with two XMM-Newton pointings of 10 ks and 50 ks duration to attribute the X-ray flux to the individual triple-system components, characterize the X-ray spectrum in depth, and assess the feasibility of more detailed follow-up studies.|
|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, 2014-05-31T00:00:00Z, 072233, 17.56_20190403_1200. https://doi.org/10.5270/esa-86zkzbm|