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The X-Ray Spectrum of the X-Ray Binary 4U 1728-34, observed with Suzaku

Published online by Cambridge University Press:  29 August 2019

Y. Lei ,
H. Zhang ,
H. Yuan  and
Y. Zhang
Y. Lei
Affiliation:
Key Laboratory of Optical Astronomy, NAO, CAS, Beijing, Chinaemail: [email protected]
H. Zhang
Affiliation:
Key Laboratory of Optical Astronomy, NAO, CAS, Beijing, Chinaemail: [email protected]
H. Yuan
Affiliation:
Key Laboratory of Optical Astronomy, NAO, CAS, Beijing, Chinaemail: [email protected]
Y. Zhang
Affiliation:
Key Laboratory of Optical Astronomy, NAO, CAS, Beijing, Chinaemail: [email protected]
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Abstract

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This poster reported our spectroscopy of the neutron-star X-ray binary 4U 1728-34, observed with Suzaku in 2010 October. It is classified as an atoll source. Its continuous X-ray spectrum can be fitted by a combination of a multicolour accretion-disk model for the soft energy, plus a power-law model for the hard energy. A broad emission line at 6–7 keV can be fitted well using a simple Gaussian component with an equivalent width of ∼322 eV. However, for this object the presence of that feature is disputed, even though our results from Suzaku do suggest the presence of a broad Fe emission line that is consistent with results from XMM-Newton. Nevertheless, the parameters of the line (the line centroid and the equivalent width) are a little different, but that could be due to a difference in modelling the continuum.

Keywords

X-ray binariesaccretionaccretion disks
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S339: Southern Horizons in Time-Domain Astronomy , November 2017 , pp. 323 - 326
Copyright
© International Astronomical Union 2019 

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