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Millimeter-Wave Mapping of the W3 Core Region at 4 and 6.5 mm

Published online by Cambridge University Press:  04 August 2017

Kenji Akabane
Affiliation:
Nobeyama Radio Observatory, Minamimaki, Minamisaku, Nagano 384-13, Japan
Hisashi Hirabayashi
Affiliation:
Nobeyama Radio Observatory, Minamimaki, Minamisaku, Nagano 384-13, Japan
Yoshiaki Sofue
Affiliation:
Nobeyama Radio Observatory, Minamimaki, Minamisaku, Nagano 384-13, Japan

Extract

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Radio continuum observations of the core region of the compact H II region W3 at 6.5 and 4 mm wavelengths were made using the Nobeyama 45-m telescope. The 6.5-mm map agrees with lower-frequency maps, showing a major contribution of free-free H II emission. At 4 mm an excess over the H II emission is found, which indicates a contribution from dust grains. Comparing with sub-mm and FIR data, we suggest the existence of two dust components: normal dust at 50 K, and low-temperature (7 K), large-size grains (or interstellar “stones”) in the region west of the W3 core.

Type
I. Star Forming Processes in the Solar Neighborhood
Copyright
Copyright © Reidel 1987 

References

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