312 citations · 2.3k across the 70 of their papers we have counts for
72 papers
Wind-driven angular momentum removal and X-ray ionization effects in Roche-lobe overflowing HMXBs
Atsuo T. Okazaki, Stanley P. Owocki
We investigate the dynamical interaction between stellar winds and Roche-lobe overflow (RLO) streams in high-mass X-ray binaries using three-dimensional SPH simulations. We show th…
Inhibition of Accretion by the Stellar Wind in Misaligned Be/X-ray Binaries
Atsuo T. Okazaki
Be/X-ray binaries (BeXRBs) constitute a major subclass of high-mass X-ray binaries. They show intermittent X-ray activity with , while remaining qui…
Spectral Properties of Irradiated Circumbinary Disks around Binary Black Holes Governed by Hydrogen Opacities Dependent on Temperature and Density
Saemi Bang, Atsuo T. Okazaki, Kimitake Hayasaki
We study the thermal and spectral properties of irradiated circumbinary disks (CBDs) around binary black holes (BBHs), using analytic, hydrogen-based opacity models that capture de…
ALMA observations of the gamma-ray binary system PSR B1259-63/LS 2883 during the 2024 periastron passage
Yutaka Fujita, Akiko Kawachi, Atsuo T. Okazaki +3
We present observations of the gamma-ray binary PSR B1259-63/LS 2883 with the Atacama Large Millimeter/submillimeter Array (ALMA) at Bands 3 (97 GHz), 6 (233 GHz), and 7 (343 GHz).…
Circumbinary Disk Spectra Irradiated by Two Central Accretion Disks in a Binary Black Hole System
Yunewoo Lee, Atsuo T. Okazaki, Kimitake Hayasaki
We study the effect of irradiation from two accretion disks (minidisks) around respective black holes of stellar to intermediate masses in a circular binary on the spectrum of a ci…
Novel application to estimate the mass-loss and the dust-formation rates in O-type gamma-ray binaries using near-infrared photometry
Yuki Moritani, Akiko Kawachi, Atsuo T. Okazaki +2
We have performed the near-infrared photometric monitoring observations of two TeV gamma-ray binaries with O-stars (LS 5039 and 1FGL J1018.6-5856), using IRSF/SIRIUS at SAAO, in or…