| Proposal ID | 079538 |
| Title | Colliding Wind X-ray Emission from the Massive Binary WR140 around Periastron |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0795380301 |
| DOI | https://doi.org/10.5270/esa-o0p832n |
| Principal Investigator, PI | Dr Kenji Hamaguchi |
| Abstract | The wind-wind collision (WWC) in eccentric massive binary systems producespredictably variable X-ray plasma. This nearly controlled collision providesan ideal laboratory for shock astrophysics, providing key constraints on how gasthermalizes at variable density and on particle acceleration. Joint XMM-Newtonand NuSTAR observation of WR 140 in AO14 discovered an extremely hard X-raycomponent, which can originate either from a kT ~13 keV plasma or inverseCompton scattering. WR 140 will experience its periastron passage in 2016, acritical time when the WWC emission changes dramatically. We propose jointXMM-Newton/NuSTAR observations of WR 140 at key phases around periastron inAO15, to determine the origin of this component and understand the X-ray Minimum. |
| Publications | No publications found for current proposal! |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2017-06-06T04:49:34Z/2018-04-29T14:18:36Z |
| 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 | 2019-05-21T22:00:00Z |
| Last Update | 2025-08-04 |
| Keywords | "shock astrophysics", "NuSTAR", "wwc emission", "xray minimum", "wr 140", "XMM", "massive binary wr140", "key phases", "key constraints", "particle acceleration", "inverse compton scattering", "hard xray component", "kev plasma", "periastron passage", "ideal laboratory", "xmm newton", "variable density", "XMM-Newton", "gas thermalizes" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Kenji Hamaguchi, 2019, 'Colliding Wind X-ray Emission from the Massive Binary WR140 around Periastron', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-o0p832n |