Star Formation in the Orion A Molecular Cloud

Y. Shimajiri; R. Kawabe; S. Takakuwa; M. Saito; T. Tsukagoshi; M. Momose; N. Ikeda; E. Akiyama; J.E. Austermann; H. Ezawa; K. Fukue; M. Hiramatsu; D. Hughes; Y. Kitamura; K. Kohno; Y. Kurono; K.S. Scott; G. Wilson; A. Yoshida; M.S. Yun

doi:10.1051/eas/1152060

All issues

Volume 52 (2011)

EAS Publications Series, 52 (2011) 307-308

Abstract

Issue		EAS Publications Series Volume 52, 2011 Conditions and Impact of Star Formation


Page(s)		307 - 308
DOI		https://doi.org/10.1051/eas/1152060
Published online		25 November 2011

Conditions and Impact of Star Formation
M. Röllig, R. Simon, V. Ossenkopf and J. Stutzki (eds)
EAS Publications Series, 52 (2011) 307-308

Star Formation in the Orion A Molecular Cloud

Y. Shimajiri¹, R. Kawabe, S. Takakuwa, M. Saito, T. Tsukagoshi, M. Momose, N. Ikeda, E. Akiyama, J.E. Austermann, H. Ezawa, K. Fukue, M. Hiramatsu, D. Hughes, Y. Kitamura, K. Kohno, Y. Kurono, K.S. Scott, G. Wilson, A. Yoshida and M.S. Yun

¹
e-mail: yoshito.shimajiri@nao.ac.jp

Abstract

We present new, wide, and deep images in the AzTEC/ASTE 1.1 mm continuum and the ¹² CO (J = 1–0) emission toward the northern part of the Orion-A GMC. We have found evidence for interactions between molecular clouds and the external forces that may trigger star formation. Two types of possible triggers were revealed: (1) Collisions of the diffuse gas on the cloud surface, particularly at the eastern side of the OMC-2/3 region, and (2) Irradiation of UV on the pre-existing filaments and dense molecular cloud cores. Our wide-field and high-sensitivity imaging has provided the first comprehensive view of the potential sites of triggered star formation in the Orion-A GMC.