A dataset provided by the European Space Agency

Name 084503
Title The extreme colliding wind binary HD 93129A moving away from periastron


DOI https://doi.org/10.57780/esa-xjt26cd
Author Prof Hugues Sana
Description With a total mass of over 100Msun, e>0.9 and P_orbvirgul120yr, HD93129A is one of the most extreme massive binaries known. Astrometric measurements of its orbit have revealed a periastron passage in Fall 2018. The strong stellar winds of the two stars and the tight separation at periastron are producing an intense wind-wind collision (WWC) and an unusually high thermal and non-thermal X-ray emission that we are currently monitoring. Here we request two additional 25ksec XMM observations to follow the X-ray emission decrease as the system progresses away from periastron. Obtaining a full coverage of the X-ray emission of HD93129A is a once-in-a-life-time opportunity to achieve observational breakthroughs in our understanding of the shock physics and of the WWC hydrodynamics.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2019-06-07T05:25:44Z/2019-12-08T01:10:27Z
Version 18.00_20191217_1110
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 2021-01-03T23:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2021-01-03T23:00:00Z, 084503, 18.00_20191217_1110. https://doi.org/10.57780/esa-xjt26cd