| Name | 050473 |
| Title | Origin of the hard X-ray emission in Gamma Cas analogs: HD 110432 |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0504730101 |
| DOI | https://doi.org/10.5270/esa-jlxxsng |
| Author | European Space Agency |
| Description | A small group of early Be stars (the class of Gamma Cas analogs) exhibit low luminosity hard X-ray emission with Log(Lx) virgul 32-33 erg/s. Both a white dwarf accreting from the circumstellar disc or magnetic interaction between the photosphere and the disc can explain the unusually hard X-ray emission. The target of the proposal, HD 110432, is after Gamma Cas itself, the X-ray brightest member of this group and furthermore displays more marked characteristics of this class than the prototype. We propose to obtain a RGS spectrum of HD 110432 in order to constrain the X-ray emission mechanism using emission line disgnostics, investigate the effect of a different disc inclination, search for abundances anomalies and look for stable periodicities. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2007-09-04T14:55:16Z/2007-09-05T16:14:46Z |
| 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 | 2008-12-02T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2008, Origin Of The Hard X-Ray Emission In Gamma Cas Analogs: Hd 110432, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-jlxxsng |