|Title||Age-dating primary stars in a wide pair with ultracool dwarfs|
|Author||Prof Frederick Walter|
|Description||We have discovered 10 wide low mass companions to main sequence stars through a common proper motion search. We propose to obtain X-ray data of the primaries in order to constrain the ages of the systems. Ages are needed to constrain the masses of the low mass companions, and determine whether they are low mass stars or brown dwarfs. Only a small fraction of ultracool dwarfs are found as companions to main sequence stars. The 10 new systems targeted here will become benchmark sources with well-determined fundamental properties such as mass, age, and distance. X-ray luminosities of the primaries will allow us to constrain the ages. The properties of the low mass secondaries will provide vital information for models of brown dwarf and low mass star formation, atmospheres, and evolution.|
|Publication||An XMM-Newton Survey of the Soft X-Ray Background. II. An All-Sky Catalog of Diffuse O VII and O VIII Emission Intensities . Henley, David B., Shelton, Robin L., . ApJS . 202-14 . 2012 . 2012ApJS..202...14H ,
XMM-Newton publication statistics . Ness, J.-U., Parmar, A. N., et all. . AN . 335-210 . 2014 . 2014AN....335..210N ,
The Interaction of the Fermi Bubbles with the Milky Way.s Hot Gas Halo . Miller, Matthew J., Bregman, Joel N., . ApJ . 829-9 . 2016 . 2016ApJ...829....9M ,
The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
A new sample of X-ray selected narrow emission-line galaxies. II. Looking for True Seyfert 2 . Pons, E., Watson, M. G., . A&A . 594-72 . 2016 . 2016A&A...594A..72P ,
Investigation of Coronal Properties of X-Ray Bright G-dwarf Stars Based on the Solar Surface Magnetic Field-Corona Relationship . Takasao, Shinsuke, Mitsuishi, Ikuyuki, et all. . ApJ . 901-70 . 2020 . 2020ApJ...901...70T ,
|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, 2011-01-29T00:00:00Z, 060283, 17.56_20190403_1200. https://doi.org/10.5270/esa-bszbrun|