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Evidence for periodic accretion–ejection in LS I +61°303

Massi, M. and Chernyakova, M. and Kraus, A. and Malyshev, D. and Jaron, F. and Kiehlmann, S. and Dzib, S. A. and Sharma, R. and Migliari, S. and Readhead, A. C. S. (2020) Evidence for periodic accretion–ejection in LS I +61°303. Monthly Notices of the Royal Astronomical Society, 498 (3). pp. 3592-3600. ISSN 0035-8711. doi:10.1093/mnras/staa2623.

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The stellar binary system LS I +61°303, composed of a compact object in an eccentric orbit around a B0 Ve star, emits from radio up to γ-ray energies. The orbital modulation of radio spectral index, X-ray, and GeV γ-ray data suggests the presence of two peaks. This two-peaked profile is in line with the accretion theory predicting two accretion–ejection events for LS I +61°303 along the 26.5 d orbit. However, the existing multiwavelength data are not simultaneous. In this paper, we report the results of a campaign covering radio, X-ray, and γ-ray observations of the system along one single orbit. Our results confirm the two predicted events along the orbit and in addition show that the positions of radio and γ-ray peaks are coincident with X-ray dips as expected for radio and γ-ray emitting ejections depleting the X-ray emitting accretion flow. We discuss future observing strategies for a systematic study of the accretion–ejection physical processes in LS I +61°303.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Chernyakova, M.0000-0002-9735-3608
Kraus, A.0000-0001-9811-568X
Jaron, F.0000-0002-7449-0888
Kiehlmann, S.0000-0001-6314-9177
Dzib, S. A.0000-0001-6010-6200
Sharma, R.0000-0001-8831-3463
Migliari, S.0000-0003-3900-567X
Readhead, A. C. S.0000-0001-9152-961X
Additional Information:© 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model ( Accepted 2020 August 24. Received 2020 July 30; in original form 2019 July 22. Published: 27 August 2020. FJ thanks Walter Alef and Helge Rottmann for providing computer power at the MPIfR high performance computer cluster. We thank Eduardo Ros for reading the manuscript and providing helpful comments. This research has made use of observations with the 100-m telescope of the MPIfR (Max-Planck-Institut für Radioastronomie) at Effelsberg, Fermi–LAT data obtained from the High Energy Astrophysics Science Archive Research Center (HEASARC), provided by National Aeronautics and Space Administration (NASA) Goddard Space Flight Center, XMM-Newton data, an ESA science mission with instruments and contributions directly funded by ESA Member States and NASA, OVRO 40-m monitoring program supported in part by NASA grants NNX08AW31G, NNX11A043G, and NNX14AQ89G and NSF grants AST-0808050 and AST-1109911. The authors acknowledge support by the state of Baden-Württemberg through bwHPC. This work was supported in part by DFG through the grant MA 7807/2-1. Data Availability: The data underlying this article will be shared on reasonable request to the corresponding author.
Group:Astronomy Department
Funding AgencyGrant Number
Baden-Württemberg StiftungUNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)MA 7807/2-1
Subject Keywords:accretion, accretion discs – stars: black holes – stars: jets – gamma-rays: stars –X-rays: binaries – X-rays: individual (LS I +61◦303)
Issue or Number:3
Record Number:CaltechAUTHORS:20201214-095337008
Persistent URL:
Official Citation:M Massi, M Chernyakova, A Kraus, D Malyshev, F Jaron, S Kiehlmann, S A Dzib, R Sharma, S Migliari, A C S Readhead, Evidence for periodic accretion–ejection in LS I +61°303, Monthly Notices of the Royal Astronomical Society, Volume 498, Issue 3, November 2020, Pages 3592–3600,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107061
Deposited By: Tony Diaz
Deposited On:14 Dec 2020 21:24
Last Modified:16 Nov 2021 18:59

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