| Name | 067008 |
| Title | Probing the winds of Oe stars: Be disks or not Be disks? |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0670080201 |
| DOI | https://doi.org/10.5270/esa-aa4i4aa |
| Author | Prof Gregor Rauw |
| Description | The scarce group of Oe stars are usually considered as the hot analogs of the Be-type objects. They should thus feature an equatorial decretion disk, possibly confined by a magnetic field. On theoretical grounds, such a magnetic field is expected to significantly affect the properties of the X-ray spectrum of the star. However, the existence of a disk has been questioned by recent optical spectropolarimetric observations and previous X-ray observations of two Oe stars (HD 155806 and HD 119682) revealed two very different behaviours. To help settle these issues, we propose to obtain XMM-Newton observations of two other Oe stars, HD 45314 and HD 60848 for 20 ksec each. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2012-04-02T12:33:47Z/2012-04-14T14:16:12Z |
| 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 | 2013-04-28T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Gregor Rauw, 2013, 067008, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-aa4i4aa |