| Name | 072054 |
| Title | A test for the theory of colliding winds: the periastron passage of 9Sgr |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0720540401 |
| DOI | https://doi.org/10.5270/esa-i2zxyfo |
| Author | European Space Agency |
| Description | We propose to monitor the X-ray emission of the 8.6-year period, highly eccentric (e = 0.7) O-type binary 9Sgr around its forthcoming periastron passage. 9Sgr is known to display a synchrotron radio emission due to relativistic electrons accelerated in the wind-wind collision region. This wind interaction zone is expected be in the adiabatic regime and the X-ray flux should thus scale as the inverse of the orbital separation. Observations near periastron and at subsequent orbital phases will allow us to test this scenario and to search for the possible presence of non-thermal X-ray emission, thereby setting constraints on the wind interaction phenomenon in a yet unexplored part of the parameter space. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2013-03-08T16:13:31Z/2014-03-05T13:56:47Z |
| 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 | 2015-04-22T22:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2015, A Test For The Theory Of Colliding Winds: The Periastron Passage Of 9Sgr, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-i2zxyfo |