A Suzaku Observation of the Low-Mass X-Ray Binary GS 1826-238 in the Hard State
| Autor: | Ko Ono, Kazuo Makishima, Kazuhiro Nakazawa, Zhongli Zhang, Soki Sakurai |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
High Energy Astrophysical Phenomena (astro-ph.HE) Range (particle radiation) Cosmology and Nongalactic Astrophysics (astro-ph.CO) Accretion (meteorology) 010308 nuclear & particles physics X-ray binary Flux FOS: Physical sciences Astronomy and Astrophysics Astrophysics 01 natural sciences Luminosity Neutron star Space and Planetary Science 0103 physical sciences Black-body radiation Low Mass Astrophysics - High Energy Astrophysical Phenomena 010303 astronomy & astrophysics Astrophysics - Cosmology and Nongalactic Astrophysics |
| DOI: | 10.48550/arxiv.1601.04985 |
| Popis: | The neutron star Low-Mass X-ray Binary GS 1826-238 was observed with Suzaku on 2009 October 21, for a total exposure of 103 ksec. Except for the type I bursts, the source intensity was constant to within ~10%. Combining the Suzaku XIS, HXD-PIN and HXD-GSO data, burst-removed persistent emission was detected over the 0.8-100 keV range, at an unabsorbed flux of 2.6e-9 erg/s/cm/cm. Although the implied 0.8-100 keV luminosity, 1.5e37 erg/s (assuming a distance of 7 kpc), is relatively high, the observed hard spectrum confirms that the source was in the hard state. The spectrum was successfully explained with an emission from a soft standard accretion disk partially Comptonized by a hot electron cloud. These results are compared with those from previous studies, including those on the same source by Thompson et al. (2005) and Cocchi et al. (2011), as well as that of Aql X-1 in the hard state obtained with Suzaku (Sakurai et al. 2014). Comment: 14 pages, 3 figures |
| Databáze: | OpenAIRE |
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