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Title: THE HARD X-RAY BEHAVIOR OF AQL X-1 DURING TYPE-I BURSTS

Abstract

We report the discovery of an anti-correlation between the soft and hard X-ray light curves of the X-ray binary Aql X-1 when bursting. This behavior may indicate that the corona is cooled by the soft X-ray shower fed by the type-I X-ray bursts, and that this process happens within a few seconds. Stacking the Aql X-1 light curves of type-I bursts, we find a shortage in the 40-50 keV band, delayed by 4.5 ± 1.4 s with respect to the soft X-rays. The photospheric radius expansion bursts are different in that neither a shortage nor an excess shows up in the hard X-ray light curve.

Authors:
; ; ; ; ;  [1];  [2];  [3]
  1. Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, 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, Villanueva de la Canñada (Madrid) (Spain)
Publication Date:
OSTI Identifier:
22215394
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 777; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMIC X-RAY BURSTS; DIAGRAMS; HARD X RADIATION; NEUTRONS; SHOWERS; SOFT X RADIATION; STARS; VISIBLE RADIATION

Citation Formats

Chen, Yu-Peng, Zhang, Shu, Zhang, Shuang-Nan, Ji, Long, Li, Jian, Wang, Jian-Min, Torres, Diego F., and Kretschmar, Peter. THE HARD X-RAY BEHAVIOR OF AQL X-1 DURING TYPE-I BURSTS. United States: N. p., 2013. Web. doi:10.1088/2041-8205/777/1/L9.
Chen, Yu-Peng, Zhang, Shu, Zhang, Shuang-Nan, Ji, Long, Li, Jian, Wang, Jian-Min, Torres, Diego F., & Kretschmar, Peter. THE HARD X-RAY BEHAVIOR OF AQL X-1 DURING TYPE-I BURSTS. United States. https://doi.org/10.1088/2041-8205/777/1/L9
Chen, Yu-Peng, Zhang, Shu, Zhang, Shuang-Nan, Ji, Long, Li, Jian, Wang, Jian-Min, Torres, Diego F., and Kretschmar, Peter. 2013. "THE HARD X-RAY BEHAVIOR OF AQL X-1 DURING TYPE-I BURSTS". United States. https://doi.org/10.1088/2041-8205/777/1/L9.
@article{osti_22215394,
title = {THE HARD X-RAY BEHAVIOR OF AQL X-1 DURING TYPE-I BURSTS},
author = {Chen, Yu-Peng and Zhang, Shu and Zhang, Shuang-Nan and Ji, Long and Li, Jian and Wang, Jian-Min and Torres, Diego F. and Kretschmar, Peter},
abstractNote = {We report the discovery of an anti-correlation between the soft and hard X-ray light curves of the X-ray binary Aql X-1 when bursting. This behavior may indicate that the corona is cooled by the soft X-ray shower fed by the type-I X-ray bursts, and that this process happens within a few seconds. Stacking the Aql X-1 light curves of type-I bursts, we find a shortage in the 40-50 keV band, delayed by 4.5 ± 1.4 s with respect to the soft X-rays. The photospheric radius expansion bursts are different in that neither a shortage nor an excess shows up in the hard X-ray light curve.},
doi = {10.1088/2041-8205/777/1/L9},
url = {https://www.osti.gov/biblio/22215394}, journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 1,
volume = 777,
place = {United States},
year = {Fri Nov 01 00:00:00 EDT 2013},
month = {Fri Nov 01 00:00:00 EDT 2013}
}