| Proposal ID | 069103 |
| Title | Constraining Star Formation: Low Mass Companions of 5 Msun Stars |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0691030101 |
| DOI | https://doi.org/10.5270/esa-alnrnqb |
| Principal Investigator, PI | Dr Nancy Remage Evans |
| Abstract | 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. |
| Publications |
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| 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2014-05-11T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "manipulate angular momentum", "chance alignments", "binary parameters", "physical companions", "star formation", "constraining star formation", "low mass companions", "pilot xray project", "genuine companions", "msun supergiants", "surprising characteristic", "wfc3 survey", "multiple system", "msun stars" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | 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 |