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Near-Infrared Imaging Polarimetry of S106 Cluster-Forming Region with SIRPOL
Hiro Saito, Motohide Tamura, Ryo Kandori +7
We present the results of wide-field JHKs polarimetry toward the HII region S106 using the IRSF (Infrared Survey Facility) telescope. Our polarimetry data revealed an extended (up…
Magnetic Field Configuration at the Galactic Center Investigated by Wide Field Near-Infrared Polarimetry
Shogo Nishiyama, Motohide Tamura, Hirofumi Hatano +13
We present a polarimetric map of a 20'x20' area toward the Galactic center. The polarization of point sources has been measured in the J, H, and Ks bands using the near-infrared po…
Mapping dust column density in dark clouds by using NIR scattered light : Case of the Lupus 3 dark cloud
Yasushi Nakajima, Ryo Kandori, Motohide Tamura +3
We present a method of mapping dust column density in dark clouds by using near-infrared scattered light. Our observations of the Lupus 3 dark cloud indicate that there is a well d…
Near-Infrared Imaging Polarimetry of M42: Aperture Polarimetry of Point-like Sources
Nobuhiko Kusakabe, Motohide Tamura, Ryo Kandori +6
We have conducted aperture polarimetry of ~500 stars of the Orion Nebula Cluster (ONC) in M42 based on our wide-field (~8'\times 8') band polarimetry. Most of the near-infra…
Wide-Field Infrared Imaging Polarimetry of the NGC 6334 Region: A Nest of Infrared Reflection Nebulae
J. Hashimoto, M. Tamura, R. Kandori +7
We report the detection of eighteen infrared reflection nebulae (IRNe) in the , , & linear polarimetric observations of the NGC 6334 massive star-formation complex, of w…
N2H+ and HC3N Observations of the Orion A Cloud
K. Tatematsu, R. Kandori, T. Umemoto +1
The ``integral-shaped filament'' of the Orion A giant molecular cloud was mapped in N2H+, and its northern end, the OMC-2/3 region was observed also in HC3N and CCS. The N2H+ distr…
Interstellar Extinction Law toward the Galactic Center II: V, J, H, and Ks Bands
Shogo Nishiyama, Tetsuya Nagata, Motohide Tamura +4
We have determined the ratios of total to selective extinction directly from observations in the optical V band and near-infrared J band toward the Galactic center. The OGLE (Optic…
Near-Infrared Polarimetry of the Eagle Nebula (M16)
Koji Sugitani, Makoto Watanabe, Motohide Tamura +10
We carried out deep and wide (about 8' x 8') JHKs imaging polarimetry in the southern region of the Eagle Nebula (M16). The polarization intensity map reveals that two YSOs with ne…
Near-Infrared Imaging Polarimetry of the Star Forming Region NGC 2024
R. Kandori, M. Tamura, N. Kusakabe +7
We conducted wide-field JHKs imaging polarimetry toward NGC 2024. We found a prominent and extended polarized nebula over NGC 2024, and constrained the location of illuminating sou…
Near-Infrared Imaging Polarimetry of the NGC 2071 Star Forming Region with SIRPOL
Motohide Tamura, Ryo Kandori, Jun Hashimoto +10
We have conducted deep JHKs imaging polarimetry of a ~8' x 8' area of the NGC 2071 star forming region. Our polarization data have revealed various infrared reflection nebulae (IRN…
Near-Infrared Extinction in The Coalsack Globule 2
Takahiro Naoi, Motohide Tamura, Tetsuya Nagata +8
We have conducted J, H, and Ks imaging observations for the Coalsack Globule 2 with the SIRIUS infrared camera on the IRSF 1.4 m telescope at SAAO, and determined the color excess…
Near-Infrared Polarization Images of The Orion Molecular Cloud 1 South Region
Jun Hashimoto, Motohide Tamura, Ryo Kandori +8
We present the polarization images in the , , & bands of the Orion Molecular Cloud 1 South region. The polarization images clearly show at least six infrared reflection…
Near Infrared Polarization Images of the Orion Nebula
M. Tamura, R. Kandori, N. Kusakabe +11
Wide-field (~8' x 8') and deep near-infrared (JHKs bands) polarization images of the Orion nebulae (IRNe) around young stellar objects (YSOs), both massive and low-mass. We found t…
Near-Infrared Photometric Monitoring of a Pre-Main-Sequence Object KH 15D
Nobuhiko Kusakabe, Motohide Tamura, Yasushi Nakajima +12
An extensive photometric monitoring of KH 15D, an enigmatic variable in the young star cluster NGC 2264, has been conducted. Simultaneous and accurate near-infrared (JHKs-bands) ph…
Near Infrared Imaging Survey of Bok Globules: Density Structure
Ryo Kandori, Yasushi Nakajima, Motohide Tamura +11
On the basis of near-infrared imaging observations, we derived visual extinction (Av) distribution toward ten Bok globules through measurements of both the color excess (E_{H-K}) a…
N2H+ Observations of Molecular Cloud Cores in Taurus
K. Tatematsu, T. Umemoto, R. Kandori +1
N2H+ observations of molecular cloud cores in Taurus with the Nobeyama 45 m radio telescope are reported. We compare ``cores with young stars'' with ``cores without young stars''.…
Grain Growth in the Dark Cloud L1251
Ryo Kandori, Kazuhito Dobashi, Hayato Uehara +2
We have performed optical imaging observations of the dark cloud L1251 at multiple wavelengths, B, V, R, and I, using the 105 cm Schmidt telescope at the Kiso Observatory, Japan. T…