| Name | 076291 |
| Title | The Electron and Ion Equilibrium in Colliding Wind Plasma |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0762910301 |
| DOI | https://doi.org/10.5270/esa-rxp8us5 |
| Author | European Space Agency |
| Description | The massive binary systems, Eta Car and WR140, emit strong hard X-rays from the wind-wind collision (WWC). The joint XMM and NuSTAR observations of Eta Car around periastron in AO13 presented detailed views of extreme hard X-ray emission from the star for the first time. The >10 keV slope has an excess from the thermal spectral model measured between 5-10 keV, suggesting that the electrons and highly ionized iron ions are not in equilibrium, or reflection emission is contaminated. We therefore propose to revisit Eta Car at orbital phase virgul0.2 when the WWC is relatively stable. For comparison, we also propose to observe WR140 at a similar orbital geometry, which does not show reflection emission and whose stellar, orbital and wind parameters are precisely determined, to study the electron ion interaction. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2015-07-02T15:18:43Z/2015-07-16T04:55:24Z |
| Version | 17.56_20190403_1200 |
| 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2016-07-29T22:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2016, The Electron And Ion Equilibrium In Colliding Wind Plasma, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-rxp8us5 |