| Proposal ID | 086223 |
| Title | Tight surveillance of the exemplary O star zeta Ophiuchi with XMM-Newton and HST |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0862230101 |
| DOI | https://doi.org/10.57780/esa-ok4re5r |
| Principal Investigator, PI | Dr Lidia Oskinova |
| Abstract | We propose a novel and decisive experiment that relies on the unrivaled jointcapabilities of XMM and HST. The closest O-type star, zeta Oph, shall beobserved continuously over its rotational period to reveal the physics ofstellar wind heating. We will discriminate between alternative models for X-rayproduction in O stars: the hot plasma is generated either in stochastic windshocks or in corotating interaction regions. The new superb X-ray image willprobe the physical conditions in the circumstellar matter of an O star. Nosimilar observations were performed before on a massive star. Observing zeta Ophfor 80ks with XMM and 15 HST orbits will allow to study correlated X-ray and UVvariability and achieve a breakthrough in our understanding of O stars. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, RGS1, RGS2 |
| Temporal Coverage | 2020-09-09T12:01:49Z/2020-09-10T14:19:03Z |
| Version | 18.02_20200221_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 | 2021-10-27T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "xmm newton", "decisive experiment", "hst orbits", "stars \:", "massive star", "stochastic wind shoc", "xray production", "corotating interaction region", "stellar wind heating", "zeta oph", "XMM-Newton", "superb xray image", "uv variability", "hot plasma", "type star", "rotational period", "HST", "physical conditions", "circumstellar matter", "tight surveillance", "star zeta ophiuchi", "XMM", "alternative models", "correlated xray" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Lidia Oskinova, 2021, 'Tight surveillance of the exemplary O star zeta Ophiuchi with XMM-Newton and HST', 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-ok4re5r |