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

Journal Article · Mon Feb 10 00:00:00 EST 2014 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/782/1/40· OSTI ID:22348032

Ji, Long; Zhang, Shu; Chen, YuPeng; Zhang, Shuang-Nan; Li, Jian ^[1]; Torres, Diego F. ^[2]; Kretschmar, Peter ^[3]

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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)

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.

• OSTI ID: 22348032
• Journal Information: Astrophysical Journal, Vol. 782, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
FEEDBACK
HARD X RADIATION
NEUTRONS
SHORTAGES
SOFT X RADIATION
STARS
TIME DELAY