A dataset provided by the European Space Agency

Name: HD16691: an extreme O-type supergiant with magnetically confined wind?
Published: 2012-09-20T00:00:00Z

Proposal ID	067110
Title	HD16691: an extreme O-type supergiant with magnetically confined wind?
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0671100101
DOI	https://doi.org/10.5270/esa-pem0fs2
Principal Investigator, PI	Dr Michael De Becker
Abstract	We propose to investigate the X-ray properties of HD16691, an O4 supergiantbelieved to be a transition object between O and Wolf-Rayet stars. Recentspectroscopic investigations by our team in the visible domain revealed astellar wind affected by a large scale corotating structure, perhaps related tothe interplay between the stellar magnetic field and the plasma outflow. Thisobject constitutes therefore a valuable target for investigating the role of thepotential magnetic confinement of the stellar wind. In addition, most of theO-type stars observed so far in X-rays belong to spectral types later than O5.An XMM-Newton study of HD16691 will therefore contribute to complete the pictureof the X-ray properties of early-type stars.
Publications	The X-ray under-luminosity of the O-type supergiants HD 16691 and HD 14947 revealed by XMM-Newton \|De Becker M. \| NewA \| 25-7 \| 2013 \| 2013NewA...25....7D \| http://ui.adsabs.harvard.edu/#abs/2013NewA...25....7D The nature of the cataclysmic variable PT Per \|Watson M. G. Bruce A. et al. \| MNRAS \| 460-4282 \| 2016 \| 2016MNRAS.460.4282W \| http://ui.adsabs.harvard.edu/#abs/2016MNRAS.460.4282W The Million Optical - Radio/X-ray Associations (MORX) Catalogue \|Flesch Eric W. \| PASA \| 33-52 \| 2016 \| 2016PASA...33...52F \| http://ui.adsabs.harvard.edu/#abs/2016PASA...33...52F Analysis of the X-ray emission of OB stars: O stars \|Ryspaeva Elizaveta Kholtygin Alexander \| RAA \| 18-104 \| 2018 \| 2018RAA....18..104R \| http://ui.adsabs.harvard.edu/#abs/2018RAA....18..104R Classification of 4XMM-DR9 sources by machine learning \|Zhang Yanxia Zhao Yongheng \| MNRAS \| 503-5263 \| 2021 \| 2021MNRAS.503.5263Z \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.503.5263Z From Active Stars to Black Holes: A Discovery Tool for Galactic X-Ray Sources \|Rodriguez Antonio C. \| PASP \| 136-054201 \| 2024 \| 2024PASP..136e4201R \| http://ui.adsabs.harvard.edu/#abs/2024PASP..136e4201R Robust constraints on feebly interacting particles using XMM-Newton \|Luque Pedro De la Torre Balaji Shyam \| PhRvD \| 109-L101305 \| 2024 \| 2024PhRvD.109j1305L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j1305L Multimessenger search for electrophilic feebly interacting particles from supernovae \|Luque Pedro De la Torre Balaji Shyam \| PhRvD \| 109-103028 \| 2024 \| 2024PhRvD.109j3028L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j3028L Importance of Cosmic-Ray Propagation on Sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 968-46 \| 2024 \| 2024ApJ...968...46D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...968...46D New 511 keV Line Data Provide Strongest sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 973-L6 \| 2024 \| 2024ApJ...973L...6D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...973L...6D
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2011-08-21T07:35:41Z/2011-08-21T13:37:40Z
Version	17.56_20190403_1200
Mission Description	The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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	2012-09-20T00:00:00Z
Last Update	2026-03-04
Keywords	"transition object", "o4 supergiant", "visible domain", "XMM-Newton", "valuable target", "plasma outflow", "type stars", "type supergiant", "stellar wind", "xmm newton", "scale corotating structure", "spectral types", "spectroscopic investigations", "stellar wind affected", "wolf rayet stars", "object constitutes", "XMM", "stellar magnetic field", "xray properties", "potential magnetic confinement"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Michael De Becker, 2012, 'HD16691: an extreme O-type supergiant with magnetically confined wind?', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-pem0fs2