A dataset provided by the European Space Agency

Name: A test for the theory of colliding winds: the periastron passage of 9Sgr
Published: 2015-04-22T22:00:00Z
License: https://creativecommons.org/licenses/by-nc/3.0/igo

Proposal ID	072054
Title	A test for the theory of colliding winds: the periastron passage of 9Sgr
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0720540401 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0720540501 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0720540601
DOI	https://doi.org/10.5270/esa-i2zxyfo
Principal Investigator, PI	Prof Gregor Rauw
Abstract	We propose to monitor the X-ray emission of the 8.6-year period, highlyeccentric (e = 0.7) O-type binary 9Sgr around its forthcoming periastronpassage. 9Sgr is known to display a synchrotron radio emission due torelativistic electrons accelerated in the wind-wind collision region. This windinteraction zone is expected be in the adiabatic regime and the X-ray fluxshould thus scale as the inverse of the orbital separation. Observations nearperiastron and at subsequent orbital phases will allow us to test this scenarioand to search for the possible presence of non-thermal X-ray emission, therebysetting constraints on the wind interaction phenomenon in a yet unexplored partof the parameter space.
Publications	Testing the theory of colliding winds: the periastron passage of 9 Sagittarii. I. X-ray and optical spectroscopy \|Rauw G. Blomme R. et al. \| A&A \| 589-121 \| 2016 \| 2016A&A...589A.121R \| http://ui.adsabs.harvard.edu/#abs/2016A&A...589A.121R 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 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	2013-03-08T16:13:31Z/2014-03-05T13:56:47Z
Version	21.51_20241115_1113
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	2015-04-22T22:00:00Z
Last Update	2026-07-09
Keywords	"colliding winds", "wind interaction phenomenon", "synchrotron radio emission", "wind interaction zone", "subsequent orbital phases", "thereby setting constraints", "xray flux", "adiabatic regime", "type binary 9sgr", "parameter space", "xray emission", "nonthermal xray emission", "orbital separation", "periastron passage", "relativistic electrons accelerated", "forthcoming periastron passage"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Prof Gregor Rauw, 2015, 'A test for the theory of colliding winds: the periastron passage of 9Sgr', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-i2zxyfo
Rights	Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.