Creating a binary/multiple system during star formation is an effective way tomanipulate angular momentum, an important ingredient in the process, leavingbinary parameters as a fingerprint. We have surveyed 69 Cepheids with the HubbleSpace Telescope Wide Field Camera 3 (WFC3) survey, and identified 39 possiblelow-mass companions to these 5 Msun supergiants, which have the surprisingcharacteristic 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 chancealignments, and this proposal is a pilot X-ray project to identify genuinecompanions to test this.
Hubble Space Telescope Snapshot Survey for Resolved Companions of Galactic Cepheids |Evans, Nancy Remage, Bond, Howard E., et al. | AJ | 151-129 | 2016 | 2016AJ....151..129E | http://ui.adsabs.harvard.edu/#abs/2016AJ....151..129E
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 al. | ApJ | 838-67 | 2017 | 2017ApJ...838...67E | http://ui.adsabs.harvard.edu/#abs/2017ApJ...838...67E
Hubble Space Telescope Snapshot Survey for Resolved Companions of Galactic Cepheids: Final Results |Evans, Nancy Remage, G\\u00fcnther, H. Moritz, et al. | ApJ | 905-81 | 2020 | 2020ApJ...905...81E | http://ui.adsabs.harvard.edu/#abs/2020ApJ...905...81E
X-Rays in Cepheids: Identifying Low-mass Companions of Intermediate-mass Stars |Evans, Nancy Remage, Engle, Scott, et al. | ApJ | 938-153 | 2022 | 2022ApJ...938..153E | http://ui.adsabs.harvard.edu/#abs/2022ApJ...938..153E
The XMM-Newton Line Emission Analysis Program (X-LEAP). I. Emission-line Survey of O VII, O VIII, and Fe L-shell Transitions |Pan, Zeyang, Qu, Zhijie, et al. | ApJS | 271-62 | 2024 | 2024ApJS..271...62P | http://ui.adsabs.harvard.edu/#abs/2024ApJS..271...62P
Robust constraints on feebly interacting particles using XMM-Newton |Luque, Pedro De la Torre, Balaji, Shyam, | PhRvD | 109-L101305 | 2024 | 2024PhRvD.109j1305L | http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j1305L
Multimessenger search for electrophilic feebly interacting particles from supernovae |Luque, Pedro De la Torre, Balaji, Shyam, | PhRvD | 109-103028 | 2024 | 2024PhRvD.109j3028L | http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j3028L
Importance of Cosmic-Ray Propagation on Sub-GeV Dark Matter Constraints |De la Torre Luque, Pedro, Balaji, Shyam, | ApJ | 968-46 | 2024 | 2024ApJ...968...46D | http://ui.adsabs.harvard.edu/#abs/2024ApJ...968...46D
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2012-09-12T06:52:49Z/2013-04-26T11:32:01Z
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 Nancy Remage Evans, 2014, 'Constraining Star Formation: Low Mass Companions of 5 Msun Stars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-alnrnqb
