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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/27060
Title: The reflection spectrum of the low-mass X-ray binary 4U 1636-53
Authors: Wang, Yanan
Méndez, Mariano
SANNA, ANDREA
Altamirano, Diego
BELLONI, Tomaso Maria Melchiorre 
Issue Date: 2017
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 468
Issue: 2
First Page: 2256
Abstract: We present 3-79 keV NuSTAR observations of the neutron star low-mass X-ray binary 4U 1636-53 in the soft, transitional and hard state. The spectra display a broad emission line at 5-10 keV. We applied several models to fit this line: A Gaussian line, a relativistically broadened emission line model, kyrline, and two models including relativistically smeared and ionized reflection off the accretion disc with different coronal heights, relxill and relxilllp. All models fit the spectra well; however, the kyrline and relxill models yield an inclination of the accretion disc of ∼88° with respect to the line of sight, which is at odds with the fact that this source shows no dips or eclipses. The relxilllp model, on the other hand, gives a reasonable inclination of ∼56°. We discuss our results for these models in this source and the possible primary source of the hard X-rays.
URI: http://hdl.handle.net/20.500.12386/27060
URL: https://academic.oup.com/mnras/article/468/2/2256/3073721
ISSN: 0035-8711
DOI: 10.1093/mnras/stx671
Bibcode ADS: 2017MNRAS.468.2256W
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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