Timing and Spectral properties of Be/X-ray pulsar EXO 2030+375 during a Type I outburst
作者： Sachindra Naik , Chandreyee Maitra , Gaurava K. Jaisawal , Biswajit Paul
DOI: 10.1088/0004-637X/764/2/158
关键词: Cyclotron 、 X-ray pulsar 、 Pulse (physics) 、 Spectroscopy 、 Pulsar 、 Continuum (design consultancy) 、 Emission spectrum 、 Astrophysics 、 Ionization 、 Physics
摘要: We present results from a study of broadband timing and spectral properties EXO 2030+375 using Suzaku observation. Pulsations with period 41.41 s strong energy dependent pulse profiles were clearly detected up to ~100 keV. Narrow dips are seen in the ~70 Presence prominent at several phases such high ranges not before. At higher energies, these gradually disappeared profile appeared single-peaked. The 1.0-200.0 keV broad-band spectrum is found be well described by partial covering cut-off power-law model. Several low emission lines also pulsar spectrum. fitted neutral as partially ionized absorbers along above continuum model yielding similar parameter values. absorber resulted into marginally better fit. fitting did require any cyclotron feature best fit To investigate changes parameters dips, we carried out pulse-phase-resolved spectroscopy. During value additional column density was estimated compared other phases. While absorber, ionization dips. This may reason for presence energies. No show systematic variation pulsar.
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