Search Publications
Suzaku observation of diffuse X-ray emission from a southwest region of the Carina Nebula
Hamaguchi, Kenji; Ezoe, Yuichiro; Ohashi, Takaya +2 more
A southwest region of the Carina Nebula was observed with the Suzaku observatory for 47ks in 2010 December. This region shows distinctively soft X-ray emission in the Chandra campaign observations. Suzaku clearly detects the diffuse emission above known foreground and background components between 0.4-5keV at the surface brightness of 3.3× 10^{-14…
SX Piscium: A near-contact mass-transferring binary with a possible brown dwarf companion
Wang, Zhi Hua; Zhu, Li Ying
SX Psc is a short-period Algol-type eclipsing binary whose photometric analysis has long been ignored. Our photometric monitoring of this target covered from 2001 December to 2018 November. Aside from some curves observed at the primary eclipses, the complete four-color light curves in the BVRcIc band were also obtained. Phot…
Observations of photospheric magnetic structure below a dark filament using the Hinode Spectro-Polarimeter
Shimojo, Masumi; Yokoyama, Takaaki; Katsukawa, Yukio
The structure of the photospheric vector magnetic field below a dark filament on the Sun is studied using the observations of the Spectro-Polarimeter attached to the Solar Optical Telescope onboard Hinode. Special attention is paid to discriminating between two suggested models, a flux rope or a bent arcade. "Inverse polarity" orientation is possi…
XMM-Newton spectrum of the magnetar CXOU J171405.7-381031
Bamba, Aya; Watanabe, Haruka; Shibata, Shinpei +1 more
We observe the magnetar CXOU J171405.7-381031 with XMM-Newton and obtain the most reliable X-ray spectral parameters for this magnetar. After removing the flux from the surrounding supernova remnant CTB 37B, the radiation of CXOU J171405.7-381031 is best described by a two-component model, consisting of a blackbody and power law. We obtain a black…
Ground-based Paα narrow-band imaging of local luminous infrared galaxies. II. Bulge structure and star formation activity
Komugi, Shinya; Takahashi, Hidenori; Doi, Mamoru +8 more
We present properties of two types of bulges (classical and pseudobulges) in 20 luminous infrared galaxies observed in the near infrared of the H, Ks, and 1.91µm narrow-band targeting of the hydrogen Paα emission line by the University of Tokyo Atacama Observatory 1 m telescope. To classify the two types of bulges, we first perfor…
Characterization of diffuse X-ray emission from IGR J17448-3232: an implication of a line-of-sight merging activity
Akamatsu, Hiroki; Nobukawa, Kumiko K.; Yamauchi, Shigeo +1 more
The results of spectral analysis for the galaxy cluster IGR J17448-3232 are presented. The intracluster medium (ICM) in the central region (r< 300^' ' }, 320kpc) has a high electron temperature plasma of kT_e ∼ 13-15keV, and an ionization temperature estimated from an intensity ratio of Fe XXVI Lyα /Fe XXV Heα lines is lower than the electron t…