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EXO 2030+375 Restarts in Reverse

Kretschmar, Peter and Fuerst, Felix and Wilson-Hodge, Colleen A. and Blay, Pere and Kajava, Jari and Alfonso-Garzón, Julia and Kühnel, Matthias and Kreykenbohm, Ingo and Wilms, Jörn and Jenke, Peter A. and Pottschmidt, Katja (2016) EXO 2030+375 Restarts in Reverse. In: 11th INTEGRAL Conference Gamma-Ray Astrophysics in Multi-Wavelength Perspective. Proceedings of Science. No.285. SISSA , Trieste, Italy, Art. No. 076.

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The Be X-ray binary pulsar EXO 2030+375, first detected in 1985, has shown a significant detected X-ray outburst at nearly every periastron passage of its 46-day orbit for the past 25 years, with one low state accompanied by a torque reversal in the 1990s. In early 2015 the outbursts progressively became fainter and less regular while the monotonic spin-up flattened. At the same time a decrease in the Hα line equivalent width was reported, indicating a change in the disk surrounding the mass donor. In order to explore the source behaviour in the poorly explored low-flux state with a possible transition to a state of centrifugal inhibition of accretion we have undertaken an observing campaign with Swift/XRT, NuSTAR and the Nordic Optical Telescope (NOT). This conference contribution reports the preliminary results obtained from our campaign.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Kretschmar, Peter0000-0001-9840-2048
Fuerst, Felix0000-0003-0388-0560
Wilson-Hodge, Colleen A.0000-0002-8585-0084
Blay, Pere0000-0003-2018-1059
Alfonso-Garzón, Julia0000-0003-0852-3474
Kreykenbohm, Ingo0000-0001-7335-1803
Wilms, Jörn0000-0003-2065-5410
Pottschmidt, Katja0000-0002-4656-6881
Additional Information:Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. We thank the Swift, NuSTAR, and NOT teams for scheduling the requested observations, sometimes on short notice.
Group:Space Radiation Laboratory, NuSTAR
Series Name:Proceedings of Science
Issue or Number:285
Record Number:CaltechAUTHORS:20180828-122923745
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89222
Deposited By: George Porter
Deposited On:28 Aug 2018 19:44
Last Modified:16 Nov 2021 00:33

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