Near-infrared observations of S 255-2: The heart of a massive YSO cluster

Authors
Itoh, Y Tamura, M Suto, H Hayashi, SS Murakawa, K Oasa, Y Nakajima, Y Kaifu, N Kosugi, G Usuda, T Doi, Y
Citation
Y. Itoh et al., Near-infrared observations of S 255-2: The heart of a massive YSO cluster, PUB AST S J, 53(3), 2001, pp. 495-500
Citations number
26
Categorie Soggetti
Space Sciences
Journal title
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
ISSN journal
00046264 → ACNP
Volume
53
Issue
3
Year of publication
2001
Pages
495 - 500
Database
ISI
SICI code
0004-6264(2001)53:3<495:NOOS2T>2.0.ZU;2-R
Abstract
High-resolution near-infrared (J H K L ' M ') images of a massive star-form ing region, S 255-2, were obtained with the Subaru Telescope and an infrare d camera, CIAO. These images clearly resolve two sets of bipolar nebulae il luminated 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 HII regions. The variation in the appearance of these early-B type stars suggests an evolutionary sequence of massive stars in the S 255 regi on.