Main Image
Volume 285 - 11th INTEGRAL Conference Gamma-Ray Astrophysics in Multi-Wavelength Perspective (INTEGRAL2016) - Posters
EXO 2030+375 Restarts in Reverse
P. Kretschmar,* F. Fuerst, C.A. Wilson-Hodge, P. Blay, J. Kajava, J. Alfonso-Garzón, M. Kühnel, I. Kreykenbohm, J. Wilms, P.A. Jenke, K. Pottschmidt
*corresponding author
Full text: pdf
Pre-published on: 2017 June 12
Published on: 2017 August 23
Abstract
The Be X-ray binary pulsar EXO 2030+375, first detected in 1985, has shown a significant de- tected 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 tran- sition 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.
DOI: https://doi.org/10.22323/1.285.0076
Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.