|Title||Constraining Star Formation: Low Mass Companions of 5 Msun Stars|
|Author||Dr Nancy Remage Evans|
|Description||Creating a binary-multiple system during star formation is an effective way to manipulate angular momentum, an important ingredient in the process, leaving binary parameters as a fingerprint. We have surveyed 69 Cepheids with the Hubble Space Telescope Wide Field Camera 3 (WFC3) survey, and identified 39 possible low-mass companions to these 5 Msun supergiants, which have the surprising characteristic that there are approximately as many F-G dwarfs as K dwarfs. X-rays are the key to determining whether they are physical companions or chance alignments, and this proposal is a pilot X-ray project to identify genuine companions to test this.|
|Publication||X-Ray Detection of the Cluster Containing the Cepheid S Mus . Remage Evans, Nancy, Pillitteri, Ignazio, et all. . ApJ . 785-25 . 2014 . 2014ApJ...785L..25R ,
Serendipitous UV source catalogues for 10 years of XMM and 5 years of Swift . Yershov, V. N., . Ap&SS . 354-97 . 2014 . 2014Ap&SS.354...97Y ,
Hubble Space Telescope Snapshot Survey for Resolved Companions of Galactic Cepheids . Evans, Nancy Remage, Bond, Howard E., et all. . AJ . 151-129 . 2016 . 2016AJ....151..129E ,
X-Ray Detection of the Cluster Containing the Cepheid S Mus . Evans, Nancy Remage, Pillitteri, Ignazio, et all. . ApJ . 785-25 . 2014 . 2014ApJ...785L..25E ,
Resolved Companions of Cepheids: Testing the Candidates with X-Ray Observations . Evans, Nancy Remage, Pillitteri, Ignazio, et all. . AJ . 151-108 . 2016 . 2016AJ....151..108E ,
The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
The Secret Lives of Cepheids: delta Cep---The Prototype of a New Class of Pulsating X-Ray Variable Stars . Engle, Scott G., Guinan, Edward F., et all. . ApJ . 838-67 . 2017 . 2017ApJ...838...67E ,
|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, 2014-05-11T00:00:00Z, 069103, 17.56_20190403_1200. https://doi.org/10.5270/esa-alnrnqb|