Search Publications
2021 superoutburst of the WZ Sge-type dwarf nova V627 Pegasi lacks an early superhump phase
Ruiz, Javier; Nogami, Daisaku; Tampo, Yusuke +27 more
Superoutbursts in WZ Sge-type dwarf novae (DNe) are characterized by both early superhumps and ordinary superhumps originating from the 2 : 1 and 3 : 1 resonances, respectively. However, some WZ Sge-type DNe show a superoutburst lacking early superhumps; it is not well established how these differ from superoutbursts with an early superhump phase.…
Investigating the magnetic field of the quiet Sun internetwork
Ichimoto, Kiyoshi; Deng, Yuanyong; Shaltout, Abdelrazek M. K. +1 more
We analyze the magnetism of the quiet Sun internetwork (IN) using high-spatial-resolution data obtained by the spectropolarimeter (SP) of the Solar Optical Telescope aboard the Hinode satellite near the disk center of the Sun. The SP data were inverted using the Stokes Inversion based on Response functions (SIR) inversion code with a single-compon…
Novel application to estimate the mass-loss and the dust-formation rates in O-type gamma-ray binaries using near-infrared photometry
Moritani, Yuki; Kawachi, Akiko; Okazaki, Atsuo T. +2 more
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 order to study the stellar parameters and their perturbations caused by the binary interactions. The whole orbital phase was observed multiple times and no significant var…