Near-Infrared Observations of S 255-2 : The Heart of a Massive YSO Cluster

High-resolution near-infrared ( $J$ $H$ $K$ $L^\prime$ $M^\prime$ ) images of a massive star-forming region, S 255-2, were obtained with the Subaru Telescope and an infrared camera, CIAO. These images clearly resolve two sets of bipolar nebulae illuminated by two independent massive YSOs. A number o...

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Published in:Publications of the Astronomical Society of Japan 2001-06, Vol.53 (3), p.495-500
Main Authors: Itoh, Yoichi, Tamura, Motohide, Suto, Hiroshi, Hayashi, Saeko S., Murakawa, Koji, Oasa, Yumiko, Nakajima, Yasushi, Kaifu, Norio, Kosugi, George, Usuda, Tomonori, Doi, Yoshiyuki
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creator Itoh, Yoichi
Tamura, Motohide
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Kosugi, George
Usuda, Tomonori
Doi, Yoshiyuki
description High-resolution near-infrared ( $J$ $H$ $K$ $L^\prime$ $M^\prime$ ) images of a massive star-forming region, S 255-2, were obtained with the Subaru Telescope and an infrared camera, CIAO. These images clearly resolve two sets of bipolar nebulae illuminated by two independent massive YSOs. A number of cluster member YSOs have been detected, including 3 new sources. Seven early-B type stars have been identified within 10 pc of S 255-2; three are associated with extended optical H II regions. The variation in the appearance of these early-B type stars suggests an evolutionary sequence of massive stars in the S 255 region.
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title Near-Infrared Observations of S 255-2 : The Heart of a Massive YSO Cluster
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