| Name | 074030 |
| Title | Investigating the origin of the X-ray emission of Cyg OB2 #5 |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0740300101 |
| DOI | https://doi.org/10.5270/esa-3rxtf5n |
| Author | Mr Constantin Cazorla |
| Description | Massive stars have strong winds, which collide in massive binaries, giving rise to hard and varying X-ray emission. Cyg OB2 #5 is such a case. It was recently found to be a quadruple system and changes in its X- ray emission indicate that X-rays arise in the wind-wind collision (WWC) between the close binary and the third star. In this context, X-rays are a crucial tool to constrain the orbital parameters, but available observations only probe two phases of the 6.7 yr orbit of the third star. A monitoring (one observation per year) is thus needed and we therefore request in this AO a short exposure observation (10 ks) to better understand this iconic system. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2014-04-10T14:12:21Z/2014-04-10T19:55:41Z |
| 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 | 2015-04-25T22:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2015-04-25T22:00:00Z, 074030, 17.56_20190403_1200. https://doi.org/10.5270/esa-3rxtf5n |