A dataset provided by the European Space Agency

Name: Probing the winds of Oe stars: Be disks or not Be disks?
Published: 2013-04-28T00:00:00Z

Proposal ID	067008
Title	Probing the winds of Oe stars: Be disks or not Be disks?
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0670080201 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0670080301
DOI	https://doi.org/10.5270/esa-aa4i4aa
Principal Investigator, PI	Prof Gregor Rauw
Abstract	The scarce group of Oe stars are usually considered as the hot analogs of theBe-type objects. They should thus feature an equatorial decretion disk, possiblyconfined by a magnetic field. On theoretical grounds, such a magnetic field isexpected to significantly affect the properties of the X-ray spectrum of thestar. However, the existence of a disk has been questioned by recent opticalspectropolarimetric observations and previous X-ray observations of two Oe stars(HD 155806 and HD 119682) revealed two very different behaviours. To help settlethese issues, we propose to obtain XMM-Newton observations of two other Oestars, HD 45314 and HD 60848 for 20 ksec each.
Publications	HD 45314: a new gamma Cassiopeiae analog among Oe stars \|Rauw G. Naze Y. et al. \| A&A \| 555-9 \| 2013 \| 2013A&A...555L...9R \| http://ui.adsabs.harvard.edu/#abs/2013A&A...555L...9R An XMM-Newton view of FeKalpha in high-mass X-ray binaries \|Gimenez-Garcia A. Torrejon J. M. et al. \| A&A \| 576-108 \| 2015 \| 2015A&A...576A.108G \| http://ui.adsabs.harvard.edu/#abs/2015A&A...576A.108G 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 Is the Pollocks paradigm of X-ray emission for O stars correct? \|Ryspaeva E. B. Kholtygin A. F. \| AN \| 338-959 \| 2017 \| 2017AN....338..959R \| http://ui.adsabs.harvard.edu/#abs/2017AN....338..959R Intriguing X-ray and optical variations of the gamma Cassiopeiae analog HD 45314 \|Rauw G. Naze Y. et al. \| A&A \| 615-44 \| 2018 \| 2018A&A...615A..44R \| http://ui.adsabs.harvard.edu/#abs/2018A&A...615A..44R 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 Contribution of a Non-Thermal Component to the X-Ray Emission of OB Stars \|Ryspaeva E. B. Kholtygin A. F. \| AstBu \| 75-127 \| 2020 \| 2020AstBu..75..127R \| http://ui.adsabs.harvard.edu/#abs/2020AstBu..75..127R Irregular emission cycles in the Oe star HDu00a060u00a0848 \|Rauw Gregor Nazu00e9 Yau00ebl et al. \| NewA \| 83-101462 \| 2021 \| 2021NewA...8301462R \| http://ui.adsabs.harvard.edu/#abs/2021NewA...8301462R 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 A possible nonthermal X-ray emission from u03b3 Cas analogues stars \|Ryspaeva Elizaveta B. Kholtygin Alexander F. \| OAst \| 30-132 \| 2021 \| 2021OAst...30..132R \| http://ui.adsabs.harvard.edu/#abs/2021OAst...30..132R 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
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2012-04-02T12:33:47Z/2012-04-14T14:16:12Z
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	2013-04-28T00:00:00Z
Last Update	2025-01-27
Keywords	"HD 155806", "magnetic field", "oe stars", "hd 45314", "hd 119682", "xmm newton", "XMM-Newton", "dis ?.", "hd 60848", "XMM", "xray spectrum", "equatorial decretion disk", "optical spectropolarimetric", "hot analogs", "type objects"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Prof Gregor Rauw, 2013, 'Probing the winds of Oe stars: Be disks or not Be disks?', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-aa4i4aa