Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2025-01-04T00:33:28.887Z Has data issue: false hasContentIssue false
  • English
  • Français

158μm [CII] Mapping of the Galactic Center Molecular Clouds

Published online by Cambridge University Press:  23 September 2016

R. Genzel ,
G. J. Stacey ,
C. H. Townes ,
A. Poglitsch  and
N. Geis
R. Genzel
Affiliation:
Max-Planck-Inst. for Extraterrestrial Physics, Garching FRG
G. J. Stacey
Affiliation:
Dept. of Physics, University of California, Berkeley, CA USA
C. H. Townes
Affiliation:
Dept. of Physics, University of California, Berkeley, CA USA
A. Poglitsch
Affiliation:
Max-Planck-Inst. for Extraterrestrial Physics, Garching FRG
N. Geis
Affiliation:
Max-Planck-Inst. for Extraterrestrial Physics, Garching FRG

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 have made 55″ resolution maps of the 158 μm [CII] emission line in the region of the curved, thermal filaments and the +20 / +50 kms−1 molecular clouds in Sgr A. The [CII] emission is spatially well correlated with the radio continuum in the filaments. The large intensity of the [CII] radiation excludes shocks as the origin of the ionization and we conclude that the curved filaments are most likely photo-ionized HII regions at the surface of dense molecular clouds. Our [CII] maps of the +20 / +50 kms−1 clouds indicate that the +50 kms−1 cloud is close to (<10pc) Sgr A west while the more massive +20 kms−1 cloud is at a greater distance from the center (>30pc).

Type
The Large - Scale Interstellar Medium
Information
Symposium - International Astronomical Union , Volume 136: The Galactic Center , 1989 , pp. 151 - 155
Copyright
Copyright © Kluwer 1989 

References

Bally, J., Stark, A.A., Wilson, R.W. and Henkel, C. 1987 Ap.J. Suppl., 65, 13.Google Scholar
Dent, W.A., Werner, M.W., Gatley, I., Becklin, E.E., Hildebrand, R., Keene, J. and Whitcomb, S.E. 1982, in The Galactic Center, eds. Riegler, and Blandford, , AIP83, p. 33.Google Scholar
Erickson, E.F., Haas, M.R., Colgan, S.W.J., Simpson, J.P., Morris, M.R., and Rubin, R.H. 1989, this conference.Google Scholar
Gatley, I., Becklin, E.E., Werner, M.W. and Wynn-Williams, 1977, Ap.J. 216, 277.Google Scholar
Güsten, R., Walmsley, C.M., and Pauls, T. 1981 Astr. Ap., 103, 197.Google Scholar
Hollenbach, , David, and McKee, , Christopher, F. 1988 preprint.Google Scholar
Lugten, J.B. 1987, Ph.D. thesis, University of California, Berkeley, CA.Google Scholar
Lugten, J.B., Genzel, R., Crawford, M.K., and Townes, C.H. 1986, Ap.J. 306, 691.CrossRefGoogle Scholar
Mezger, P.G., Zylka, R., Salter, C.J., Wink, J.E., Chini, R. and Kreysa, E. 1988 preprint.Google Scholar
Morris, M. and Yusef-Zadeh, F. 1985, Astr. J., 90, 2511.Google Scholar
Serabyn, E. and Güsten, R. 1987, Astr. Ap., 184, 133.Google Scholar
Stacey, G.J., Lugten, J.B., Genzel, R., and Townes, C.H. 1988 in prep. Google Scholar
Yusef-Zadeh, R., Morris, M. and Chance, D. 1984, Nature 310, 557.CrossRefGoogle Scholar