| Proposal ID | 086284 |
| Title | A search for symbiotic activity in CH-stars |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0862840101 |
| DOI | https://doi.org/10.57780/esa-rqxrfo7 |
| Principal Investigator, PI | Prof Thomas Maccarone |
| Abstract | We propose to observe 4 CH stars. These are carbon-enhanced Population II giantstars nearly all of which have white dwarf binaries, which are responsible fortheir unusual abundances. Based on their orbital parameters, distances, andstellar parameters, we have identified the best candidates for showing X-rayemission. None of these stars has yet been observed by anything more sensitivethan ROSAT, but we anticipate that they should be detectable in a modest amountof XMM time. Discovering X-ray emission will open up a new understanding of thestellar winds from these stars, and of the otherwise hard-to-measure masses oftheir white dwarfs. |
| Publications |
|
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2020-12-01T09:27:02Z/2021-04-22T11:37:47Z |
| Version | 19.16_20210326_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 | 2022-05-22T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "modest amount", "discovering xray emission", "otherwise hard", "white dwarf binary", "white dwarfs", "orbital parameters", "stellar parameters", "symbiotic activity", "ROSAT", "xray emission", "xmm time", "XMM", "ch stars", "stellar winds" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Thomas Maccarone, 2022, 'A search for symbiotic activity in CH-stars', 19.16_20210326_1200, European Space Agency, https://doi.org/10.57780/esa-rqxrfo7 |