Name | 050068 |
Title | Disentangling the High-Energy sources in the peculiar magnetic star HD191612 |
URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0500680201 |
DOI | https://doi.org/10.5270/esa-ginwufm |
Author | European Space Agency |
Description | The peculiar star HD191612 has been followed both in the visible and X-ray ranges. In the visible domain, this star displays spectacular line profile variations alternating between two different spectral states (O6-O8) with a period of virgul538d. Observations with XMM over half this timescale have revealed an overluminosity compared to typical O-type stars and some variations, about 30% in flux. However, the origin of the X-rays is still unclear: since a recent study unveiled the binarity of the star (with an orbital period of 1540d), a colliding wind phenomenon might contribute to the bright emission. To assess the origin of the X-ray emission in this peculiar star, an additional observation with XMM-Newton is needed. |
Publication | No observations found associated with the current proposal |
Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2008-04-02T23:43:13Z/2008-04-03T06:21:47Z |
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 | 2009-06-05T00:00:00Z |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, 2009, Disentangling The High-Energy Sources In The Peculiar Magnetic Star Hd191612, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ginwufm |