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A Chain of Dark Clouds in Projection Against the Galactic Center
Takahiro Nagayama, Shuji Sato, Shogo Nishiyama +9
In the J, H, and Ks bands survey of the the Galactic Center region over an area of 2deg x 5deg, we have found many dark clouds, among which a distinguished chain of dark clouds can…
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…
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…
Sequential star formation in a cometary globule (BRC37) of IC1396
Hisashi Ikeda, Koji Sugitani, Makoto Watanabe +9
We have carried out near-IR/optical observations to examine star formation toward a bright-rimmed cometary globule (BRC37) facing the exciting star(s) of an HII region (IC1396) con…
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…
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 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…
The Distance to the Galactic Center Derived From Infrared Photometry of Bulge Red Clump Stars
Shogo Nishiyama, Tetsuya Nagata, Shuji Sato +7
On the basis of the near infrared observations of bulge red clump stars near the Galactic center, we have determined the galactocentric distance to be R_0 = 7.52 +- 0.10 (stat) +-…
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…
A Distinct Structure Inside the Galactic Bar
Shogo Nishiyama, Tetsuya Nagata, Daisuke Baba +16
We present the result of a near-infrared (J H Ks) survey along the Galactic plane, -10.5deg < l < +10.5deg and b=+1.0deg, with the IRSF 1.4m telescope and the SIRIUS camera. Ks vs.…
V1647 Orionis (IRAS 05436-0007) : A New Look at McNeil's Nebula
D. K. Ojha, N. Kusakabe, M. Tamura +10
We present a study of the newly discovered McNeil's nebula in Orion using the JHKs-band simultaneous observations with the near-infrared (NIR) camera SIRIUS on the IRSF 1.4m telesc…
Deep near-infrared observations of W3 Main star forming region
D. K. Ojha, M. Tamura, Y. Nakajima +8
We present a deep JHKs-band imaging survey of the W3 Main star forming region, using the near-infrared camera, SIRIUS, mounted on the University of Hawaii 2.2m telescope. The near-…
Variable stars in the Magellanic Clouds: II. The data and infrared properties
Yoshifusa Ita, Toshihiko Tanabe, Noriyuki Matsunaga +10
The data of 8,852 and 2,927 variable stars detected by OGLE survey in the Large and Small Magellanic Clouds are presented. They are cross-identified with the SIRIUS JHK survey data…
The Infrared Counterpart of the X-Ray Nova XTE J1720-318
Tetsuya Nagata, Daisuke Kato, Daisuke Baba +15
We report on the discovery of an infrared counterpart to the X-ray transient XTE J1720-318 on 2003 January 18, nine days after an X-ray outburst, and the infrared light curve durin…
Variable Stars in the Magellanic Clouds: Results from OGLE and SIRIUS
Yoshifusa Ita, Toshihiko Tanabe, Noriyuki Matsunaga +10
We have performed a cross-identification between OGLE-II data and single-epoch SIRIUS JHK survey data in the LMC and SMC. After eliminating obvious spurious variables, we determine…
Pulsation at the tip of the first giant branch?
Yoshifusa Ita, Toshihiko Tanabé, Noriyuki Matsunaga +10
The first results of our ongoing near-infrared (NIR) survey of the variable red giants in the Large Magellanic Cloud, using the Infrared Survey Facility (IRSF) and the SIRIUS infra…