Hostname: page-component-8448b6f56d-dnltx Total loading time: 0 Render date: 2024-04-25T06:49:10.561Z Has data issue: false hasContentIssue false
  • English
  • Français

GOT C+ Survey of [CII] 158 μm Emission: Atomic to Molecular Cloud Transitions in the Inner Galaxy†

Published online by Cambridge University Press:  21 March 2013

T. Velusamy ,
W. D. Langer ,
K. Willacy ,
J. L. Pineda  and
P. F. Goldsmith
T. Velusamy
Affiliation:
Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA email: Thangasamy.Velusamy@jpl.nasa.gov
W. D. Langer
Affiliation:
Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA email: Thangasamy.Velusamy@jpl.nasa.gov
K. Willacy
Affiliation:
Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA email: Thangasamy.Velusamy@jpl.nasa.gov
J. L. Pineda
Affiliation:
Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA email: Thangasamy.Velusamy@jpl.nasa.gov
P. F. Goldsmith
Affiliation:
Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA email: Thangasamy.Velusamy@jpl.nasa.gov
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We present the results of the distribution of CO-dark H2 gas in a sample of 2223 interstellar clouds in the inner Galaxy (l=−90° to +57°) detected in the velocity resolved [CII] spectra observed in the GOT C+ survey using the Herschel HIFI. We analyze the [CII] intensities along with the ancillary HI, 12CO and 13CO data for each cloud to determine their evolutionary state and to derive the H2 column densities in the C+ and C+/CO transition layers in the cloud. We discuss the overall Galactic distribution of the [CII] clouds and their properties as a function Galactic radius. GOT C+ results on the global distribution of [CII] clouds and CO-dark H2 gas traces the FUV intensity and star formation rate in the Galactic disk.

Keywords

ISM: clouds — ISM: molecules — ISM: structure — infrared: ISM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S292: Molecular Gas, Dust, and Star Formation in Galaxies , August 2012 , pp. 235 - 238
Copyright
Copyright © International Astronomical Union 2013

Footnotes

†

Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.

References

Abdo, A. A., Ackermann, M., Ajello, M., et al., 2010, ApJ, 710, 133Google Scholar
Dame, T. M., Hartmann, D., & Thaddeus, P. 2001, ApJ, 547, 792CrossRefGoogle Scholar
Goldsmith, P. F., Langer, W. D., Pineda, J. L.et al. 2012 ApJS (in press)Google Scholar
Langer, W. D., Velusamy, T., Pineda, J. L., et al. 2010a, ESLAB2010, on lineGoogle Scholar
Langer, W. D., Velusamy, T., Pineda, J. L.et al. 2010b, A&A, 521, L17Google Scholar
McClure-Griffiths, N., Dickey, J., Gaensler, B., et al. 2005, ApJS, 158, 178CrossRefGoogle Scholar
Pineda, J. L., Velusamy, T., Langer, W. D.et al. 2010, A&A, 521, L19Google Scholar
Pineda, J. L., Langer, W. D., Velusamy, T., et al. 2012 (in preparation)Google Scholar
Reach, W. T., Koo, B., & Heiles, C. 1994, ApJ, 429, 672CrossRefGoogle Scholar
Stil, J. M., Taylor, A. R., Dickey, J. M., et al. 2006, AJ, 132, 1158Google Scholar
Velusamy, T., Langer, W. D., Pineda, J.et al. 2010, A&A, 521, L18Google Scholar
Velusamy, T., Langer, W. D., Pineda, J.et al. 2012, A&A, 541, L10Google Scholar
Wolfire, M. G., McKee, C. F., Hollenbach, D., et al. 2003, ApJ, 587, 278Google Scholar
Wolfire, M. G., Hollenbach, D., & McKee, C. F. 2010, ApJ, 716, 1191Google Scholar