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Title: The hard X-ray shortages prompted by the clock bursts in GS 1826-238

We report on a study of GS 1826-238 using all available Rossi X-Ray Timing Explorer observations, concentrating on the behavior of the hard X-rays during type-I bursts. We find a hard X-ray shortage at 30-50 keV prompted by the shower of soft X-rays coming from type-I bursts. This shortage happens with a time delay after the peak of the soft flux of 3.6 ± 1.2 s. The behavior of hard X-rays during bursts indicates cooling and reheating of the corona, during which a large amount of energy is required. We speculate that this energy originates from the feedback of the type-I bursts to the accretion process, resulting in a rapid temporary increase of the accretion rate.
Authors:
; ; ; ;  [1] ;  [2] ;  [3]
  1. Laboratory for Particle Astrophysics, Institute of High Energy Physics, Beijing 100049 (China)
  2. Institució Catalana de Recerca i Estudis Avançats (ICREA), E-08010 Barcelona (Spain)
  3. European Space Astronomy Centre (ESA/ESAC), Science Operations Department, E-28691 Villanueva de la Cañada (Madrid) (Spain)
Publication Date:
OSTI Identifier:
22348032
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 782; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; FEEDBACK; HARD X RADIATION; NEUTRONS; SHORTAGES; SOFT X RADIATION; STARS; TIME DELAY