| Name | 060062 |
| Title | The X-ray properties of the mysterious high Galactic latitude O-star HD93521 |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0600620101 |
| DOI | https://doi.org/10.5270/esa-duuu07i |
| Author | European Space Agency |
| Description | We propose to investigate the X-ray properties of the mysterious O9.5Vp star HD93521. This object is a very fast rotator, located at an unusually high Galactic latitude of 62.15 and displaying prominent line profile variability in the optical and UV domain. The nature of this star has been much debated over the last decades and it has been suggested that this is either a rather normal Population I O-type star displaying non-radial pulsations or a low-mass Population II object, or an O-star with a compact companion that accretes matter from the O-star. X-ray observations have the power to discriminate between these scenarios since the X-ray spectrum and luminosity are expected to be quite distinct in the three cases. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2009-11-02T23:07:35Z/2009-11-03T10:44:27Z |
| 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 | 2010-11-26T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2010, The X-Ray Properties Of The Mysterious High Galactic Latitude O-Star Hd93521, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-duuu07i |