| Name | 067110 |
| Title | HD16691: an extreme O-type supergiant with magnetically confined wind? |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0671100101 |
| DOI | https://doi.org/10.5270/esa-pem0fs2 |
| Author | European Space Agency |
| Description | We propose to investigate the X-ray properties of HD16691, an O4 supergiant believed to be a transition object between O and Wolf-Rayet stars. Recent spectroscopic investigations by our team in the visible domain revealed a stellar wind affected by a large scale corotating structure, perhaps related to the interplay between the stellar magnetic field and the plasma outflow. This object constitutes therefore a valuable target for investigating the role of the potential magnetic confinement of the stellar wind. In addition, most of the O-type stars observed so far in X-rays belong to spectral types later than O5. An XMM-Newton study of HD16691 will therefore contribute to complete the picture of the X-ray properties of early-type stars. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2011-08-21T07:35:41Z/2011-08-21T13:37:40Z |
| 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 | 2012-09-20T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2012, Hd16691: An Extreme O-Type Supergiant With Magnetically Confined Windquestionmark, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-pem0fs2 |