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The Dust Cavity Around the Exciting Star of Small H II Regions

Published online by Cambridge University Press:  04 August 2017

S. Yoshida ,
S. Mizuno ,
M. Nakano ,
T. Kogure ,
T. Sasaki  and
S. D. Wiramihardja
S. Yoshida
Affiliation:
Department of Astronomy, University of Tokyo, Kyoto 606, Japan
S. Mizuno
Affiliation:
Kanazawa Institute of Technology, Kanazawa 921, Japan
M. Nakano
Affiliation:
Department of Astronomy, University of Tokyo, Kyoto 606, Japan
T. Kogure
Affiliation:
Department of Astronomy, University of Tokyo, Kyoto 606, Japan
T. Sasaki
Affiliation:
Tokyo Astronomical Observatory, Mitaka, Tokyo 181, Japan
S. D. Wiramihardja
Affiliation:
Department of Astronomy, University of Tokyo, Kyoto 606, Japan

Extract

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In a series of observations (Mizuno et al. 1981; Mizuno 1982; Nakano et al. 1983), we have carried out the surface photometry of small H II regions which were selected from Sharpless catalogue (1959) by the following properties: (1) small angular size (≦ 10 arcmin), (2) round and simple appearance, and (3) a single BO V star as the exciting star. Properties (1) and (2) are for the convenience of image processing, and property (3) is to avoid the contamination of [O III] emission in the V-band so as to get pure continuum intensity.

Type
I. Star Forming Processes in the Solar Neighborhood
Information
Symposium - International Astronomical Union , Volume 115: Star Forming Regions , 1987 , pp. 189 - 190
Copyright
Copyright © Reidel 1987 

References

Hoag, A.A., Johnson, H.L., Iriarte, B., Mitchell, R.I., Hallam, K.L., Sharpless, S.: 1961, Publ. U.S. Naval Obs. 16.Google Scholar
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Nakano, M., Kogure, T., Mizuno, S., Sakka, K., Sasaki, T., Wiramihardja, S.D.: 1983, Astrophys. Sp. Sci. 89, 407.Google Scholar
Sharpless, S.: 1959, Astrophys. J. Suppl. 39, 157.Google Scholar