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Distortion of Magnetic Fields in the Dense Core SL42 (CrA-E) in the Corona Australis Molecular Cloud Complex
Ryo Kandori, Motohide Tamura, Masao Saito +9
Detailed magnetic field structure of the dense core SL42 (CrA-E) in the Corona Australis molecular cloud complex was investigated based on near-infrared polarimetric observations o…
Near-infrared [FeII] and H2 line mapping of the supernova remnant IC443 with the IRSF/SIRIUS
Takuma Kokusho, Hiroki Torii, Takahiro Nagayama +4
We investigate properties of the interstellar medium (ISM) interacting with shocks around the Galactic supernova remnant IC443, using the results of near-infrared [FeII] and H2 lin…
Distortion of Magnetic Fields in BHR 71
Ryo Kandori, Motohide Tamura, Masao Saito +9
The magnetic field structure of a star-forming Bok globule BHR 71 was determined based on near-infrared polarimetric observations of background stars. The magnetic field in BHR 71…
Distortion of Magnetic Fields in Barnard 335
Ryo Kandori, Masao Saito, Motohide Tamura +9
In this study, the detailed magnetic field structure of the dense protostellar core Barnard 335 (B335) was revealed based on near-infrared polarimetric observations of background s…
Distortion of Magnetic Fields in the Dense Core CB81 (L1774, Pipe 42) in the Pipe Nebula
Ryo Kandori, Motohide Tamura, Masao Saito +9
The detailed magnetic field structure of the starless dense core CB81 (L1774, Pipe 42) in the Pipe Nebula was determined based on near-infrared polarimetric observations of backgro…
Distortion of Magnetic Fields in a Starless Core VI: Application of Flux Freezing Model and Core Formation of FeSt 1-457
Ryo Kandori, Kohji Tomisaka, Masao Saito +9
Observational data for the hourglass-like magnetic field toward the starless dense core FeSt 1-457 were compared with a flux freezing magnetic field model (Myers et al. 2018). Fitt…
Distortion of Magnetic Fields in Barnard 68
Ryo Kandori, Motohide Tamura, Masao Saito +8
The magnetic field structure, kinematical stability, and evolutionary status of the starless dense core Barnard 68 (B68) are revealed based on the near-infrared polarimetric observ…
Near-Infrared Imaging Polarimetry toward M17 SWex
Koji Sugitani, Fumitaka Nakamura, Tomomi Shimoikura +7
We conducted near-infrared (JHKs) imaging polarimetry toward the infrared dark cloud (IRDC) M17 SWex, including almost all of the IRDC filaments as well as its outskirts, with the…
Distortion of Magnetic Fields in a Starless Core V: Near-infrared and Submillimeter Polarization in FeSt 1-457
Ryo Kandori, Tetsuya Nagata, Ryo Tazaki +9
The relationship between submillimeter (submm) dust emission polarization and near-infrared (NIR) -band polarization produced by dust dichroic extinction was studied for the col…
Distortion of Magnetic Fields in a Starless Core IV: Magnetic Field Scaling on Density and Mass-to-flux Ratio Distribution in FeSt 1-457
Ryo Kandori, Kohji Tomisaka, Motohide Tamura +7
In the present study, the magnetic field scaling on density, , was revealed in a single starless core for the first time. The index of was obta…
Low-luminosity Type IIP Supernova 2016bkv with early-phase circumstellar interaction
Tatsuya Nakaoka, Koji S. Kawabata, Keiichi Maeda +22
We present optical and near-infrared observations of a low-luminosity Type IIP supernova (SN) 2016bkv from the initial rising phase to the plateau phase. Our observations show that…
Distortion of Magnetic Fields in a Starless Core III: Polarization--Extinction Relationship in FeSt 1-457
Ryo Kandori, Motohide Tamura, Tetsuya Nagata +5
The relationship between dust polarization and extinction was determined for the cold dense starless molecular cloud core FeSt 1-457 based on the background star polarimetry of dic…
The optical properties of galaxies in the Ophiuchus cluster
Florence Durret, Ken'ichi Wakamatsu, Christophe Adami +2
We investigate the optical properties of Ophiuchus to obtain clues on the formation epoch of this cluster, and compare them to those of the Coma cluster, which is comparable in mas…
Distortion of Magnetic Fields in a Starless Core II: 3D Magnetic Field Structure of FeSt 1-457
Ryo Kandori, Motohide Tamura, Kohji Tomisaka +6
Three dimensional (3D) magnetic field information on molecular clouds and cores is important for revealing their kinematical stability (magnetic support) against gravity which is f…
OISTER Optical and Near-Infrared Monitoring Observations of a Peculiar Radio-Loud Active Galactic Nucleus SDSS J110006.07+442144.3
Tomoki Morokuma, Masaomi Tanaka, Yasuyuki T. Tanaka +80
We present monitoring campaign observations at optical and near-infrared (NIR) wavelengths for a radio-loud active galactic nucleus (AGN) at z=0.840, SDSS~J110006.07+442144.3 (here…
Distortion of Magnetic Fields in a Starless Core: Near-Infrared Polarimetry of FeSt 1-457
Ryo Kandori, Motohide Tamura, Nobuhiko Kusakabe +6
Magnetic fields are believed to play an important role in controlling the stability and contraction of dense condensations of gas and dust leading to the formation of stars and pla…
A lack of classical Cepheids in the inner part of the Galactic disk
Noriyuki Matsunaga, Michael W. Feast, Giuseppe Bono +6
Recent large-scale infrared surveys have been revealing stellar populations in the inner Galaxy seen through strong interstellar extinction in the disk. In particular, classical Ce…
Concurrent Formation of Carbon and Silicate Dust in Nova V1280 Sco
Itsuki Sakon, Shigeyuki Sako, Takashi Onaka +12
We present infrared multi-epoch observations of the dust forming nova V1280 Sco over 2000 days from the outburst. The temporal evolution of the infrared spectral energy distr…
Variable optical polarization during high state in gamma-ray loud narrow line Seyfert 1 galaxy 1H 0323+342
Ryosuke Itoh, Yasuyuki T. Tanaka, Hiroshi Akitaya +34
We present results of optical polarimetric and multi-band photometric observations for gamma-ray loud narrow-line Seyfert 1 galaxy 1H 0323+342. This object has been monitored by 1.…
Large-area [Fe II] Line Mapping of the Supernova Remnant IC443 with the IRSF/SIRIUS
Takuma Kokusho, Takahiro Nagayama, Hidehiro Kaneda +3
We present the result of near-infrared (near-IR) [Fe II] line mapping of the supernova remnant IC443 with the IRSF/SIRIUS, using the two narrow-band filters tuned for the [Fe II] 1…
Near Infrared Circular Polarization Images of NGC 6334-V
Jungmi Kwon, M. Tamura, P. Lucas +7
We present results from deep imaging linear and circular polarimetry of the massive star-forming region NGC 6334- V. These observations show high degrees of circular polarization (…
1 um Excess Sources in the UKIDSS - I. Three T Dwarfs in the SDSS Southern Equatorial Stripe
Y. Matsuoka, B. A. Peterson, K. L. Murata +8
We report the discovery of two field brown dwarfs, ULAS J0128-0041 and ULAS J0321+0051, and the rediscovery of ULAS J0226+0051 (IfA 0230-Z1), in the Sloan Digital Sky Survey (SDSS)…
Magnetic Field Configuration at the Galactic Center Investigated by Wide Field Near-Infrared Polarimetry: Transition from a Toroidal to a Poloidal Magnetic Field
Shogo Nishiyama, Hirofumi Hatano, Motohide Tamura +8
We present a large-scale view of the magnetic field in the central 2deg * 2deg region of our Galaxy. The polarization of point sources has been measured in the J, H, and Ks bands u…