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CO Observations of the λ-Orionis Ring

Published online by Cambridge University Press:  05 March 2013

W. J. Lang  and
M. R. W. Masheder
W. J. Lang
Affiliation:
H. H. Wills Physics Laboratory, Bristol University, Tyndall Ave, Bristol, BS8 1TL, UK; w.j.lang@bristol.ac.uk
M. R. W. Masheder
Affiliation:
H. H. Wills Physics Laboratory, Bristol University, Tyndall Ave, Bristol, BS8 1TL, UK; mike.masheder@bristol.ac.uk
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Abstract

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We present results from a new 12CO (J =1→ 0) survey of theλ-Orionis region. The observations cover 110 square degrees uniformly on a Nyquist-sampled grid. We discover CO emission at levels far lower than possible in previous surveys, revealing a structure similar to that seen in IRAS 100μ maps. We derive a total molecular mass of 1·1×104 M☉. A possible explanation for the isolated and localised outbreak of star formation in the region is discussed.

Keywords

ISM: bubblesISM: cloudsISM: HII regionsISM: molecules
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 15 , Issue 1 , 1998 , pp. 70 - 73
Copyright
Copyright © Astronomical Society of Australia 1998

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