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Galactic Observations of Terahertz C+ (GOT C+): [CII] Detection of Warm “Dark Gas” in the ISM

Published online by Cambridge University Press:  25 November 2011

W.D. Langer
Affiliation:
JPL-Caltech, MS 183-601, 4800 Oak Grove Dr., Pasadena, CA 91109, USA
T. Velusamy
Affiliation:
JPL-Caltech, MS 183-601, 4800 Oak Grove Dr., Pasadena, CA 91109, USA
J. Pineda
Affiliation:
JPL-Caltech, MS 183-601, 4800 Oak Grove Dr., Pasadena, CA 91109, USA
P. Goldsmith
Affiliation:
JPL-Caltech, MS 183-601, 4800 Oak Grove Dr., Pasadena, CA 91109, USA
D. Li
Affiliation:
JPL-Caltech, MS 183-601, 4800 Oak Grove Dr., Pasadena, CA 91109, USA
H.W. Yorke
Affiliation:
JPL-Caltech, MS 183-601, 4800 Oak Grove Dr., Pasadena, CA 91109, USA
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Abstract

The Herschel HIFI Key Program, Galactic Observations of Terahertz C+ (GOT C+) is a survey of [CII] 1.9 THz emission throughout the Galaxy. Comparison of the first results of this survey with HI and CO isotopomer emission reveals excess [CII] emission beyond that expected from HI and CO layers alone, and is best explained as coming from a hidden layer of H2 gas, the so-called ISM “dark gas”.

Type
Research Article
Copyright
© EAS, EDP Sciences 2011

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References

Langer, W.D., Velusamy, T., Pineda, J.L., et al., 2010a, ESLAB2010, on line
Langer, W.D., Velusamy, T., Pineda, J.L., et al., 2010b, A&A, 521, L17 (LVP2010)
Pineda, J.L., Velusamy, T., Langer, W.D., et al., 2010, A&A, 521, L19 (LVP2010)
Velusamy, T., Langer, W.D., Pineda, J.L., et al., 2010, A&A, 521, L18 (LVP2010)
Wolfire, M.G., Hollenbach, D., & McKee, C.F., 2010, ApJ, 716, 1191 CrossRef

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Galactic Observations of Terahertz C+ (GOT C+): [CII] Detection of Warm “Dark Gas” in the ISM
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Galactic Observations of Terahertz C+ (GOT C+): [CII] Detection of Warm “Dark Gas” in the ISM
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