A Suzaku View of Accretion-powered X-Ray Pulsar GX 1+4

Journal Article · Mon Mar 20 00:00:00 EDT 2017 · Astrophysical Journal

DOI:https://doi.org/10.3847/1538-4357/AA6301· OSTI ID:22869196

Yoshida, Yuki; Kitamoto, Shunji; Suzuki, Hiroo; Hoshino, Akio ^[1]; Naik, Sachindra

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1. Department of Physics, College of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 171-8501 (Japan)

We present results obtained from a Suzaku observation of the accretion-powered X-ray pulsar GX 1+4. A broadband continuum spectrum of the pulsar was found to be better described by a simple model consisting of a blackbody component and an exponential cutoff power law than the previously used compTT continuum model. Though the pulse profile had a sharp dip in soft X-rays (<10 keV), phase-resolved spectroscopy confirmed that the dimming was not due to an increase in photoelectric absorption. Phase-sliced spectral analysis showed the presence of a significant spectral modulation beyond 10 keV except for the dip phase. A search for the presence of a cyclotron resonance scattering feature in the Suzaku spectra yielded a negative result. Iron K-shell (K{sub α} and K{sub β}) emission lines from nearly neutral iron ions (

• OSTI ID: 22869196
• Journal Information: Astrophysical Journal, Vol. 838, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ABSORPTION
ACCRETION DISKS
CYCLOTRON RESONANCE
ELEMENT ABUNDANCE
FLUORESCENCE
IRON
K SHELL
KEV RANGE
NEUTRON STARS
PULSARS
RESCATTERING
RESONANCE SCATTERING
SOFT X RADIATION
SPECTRA
SPECTROSCOPY