| Name | 076022 |
| Title | HD45314 the first gamma Cas analog among Oe stars |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0760220601 |
| DOI | https://doi.org/10.5270/esa-g170nil |
| Author | Prof Gregor Rauw |
| Description | In a previous XMM observation we discovered that the Oe star HD45314 belongs to the group of so-called gamma Cas analogs. Its X-ray luminosity is about 10 times higher than that of normal OB stars and the X-ray spectrum is extremely hard, suggesting kT virgul 21keV. During the previous X-ray observation, simultaneous optical spectra indicated that HD45314 was in a rather low emission state. Our monitoring of the optical spectrum of this star reveals huge variations in the strengths of the emission lines which are diagnostics of the circumstellar disk. Since the most plausible scenarios for the gamma Cas phenomenon involve a strong interaction with the circumstellar disk, we propose to reobserve HD45314 next time the star undergoes an outburst and/or in case its disk should clear away. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2016-03-08T05:08:39Z/2016-03-08T13:45:19Z |
| 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 | 2017-03-30T22:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Gregor Rauw, 2017, 076022, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-g170nil |