Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-25T15:56:35.644Z Has data issue: false hasContentIssue false
  • English
  • Français

Co Distributions towards the Southern Dark Cloud of DC 303.6+0.9

Published online by Cambridge University Press:  12 April 2016

Jing-sheng Wang  and
Robina E. Otrupcek
Jing-sheng Wang
Affiliation:
Yunnan Observatory, P.O. Box 110, Kunming, 650011, P.R. China
Robina E. Otrupcek
Affiliation:
Australian NRAO, P.O. Box 276, Parkes, N.S.W. 2870, Australia

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.

Dark clouds in the southern skies have been observed with CO J = 1-0 line. The mm-wave telescope of 4-m diameter was used. The beam width was 2’.7 at 2.6 mm wavelength and beam efficiency 0.52. The authors have developed a high-resolution acousto-optical spectrograph with a velocity resolution of 0.07 kms-1 for this purpose. The 115.27 GHz line was detected over an area of 27’ x 21’ including the dark cloud of DC 303.6+0.9 in Crux. Most of the positions, out of a total number of 63, show a double peak line structure. Some positions also show red and blue shifted wings. An average profile shows a higher peak at the radial velocity of -2.8 kms-1 with a calibrated radiation temperature of 5.5 K, a half line width of 1.5 kms-1, and another peak in relative red at a velocity of -0.8 kms-1 with a temperature of 4.3 K, a half line widh of 1.0 kms-1. Profiles distributed over this area show a bipolar diagram. It hints that a certain systematic motions may exist in this region.

Type
I. Molecular Clouds, Star Formation And HII Regions
Information
International Astronomical Union Colloquium , Volume 120: Structure and Dynamics of the Interstellar Medium , 1989 , pp. 13 - 17
Copyright
Copyright © Springer-Verlag 1989

References

de Vries, C.P., Brand, J., Israel, F.P., de Graauw, Th., Wouterloot, J.G.A., van de Stadt, H. and Habing, H.J. 1984, Astron. Astrophys. Suppl. Ser. 56, 333.Google Scholar
Fukui, Y., Sugitani, K., Takaba, H., Iwata, T., Mizuno, A., Ogawa, H. and Kawabata, K. 1986, Astrophys. J. Lett. 311, L85.Google Scholar
Goss, W.M., Manchester, R.N., Brooks, J.W., Sinclair, M.W. and Manefield, G.A. 1980, Mon. Not. Roy. Astron. Soc. 191, 533.Google Scholar
Hartley, M., Manchester, R.N., Smith, R.M., Tritton, S.B. and Goss, W.M. 1986, Astron. Astrophys. Suppl. Ser. 63, 27.Google Scholar
Huggins, P.J., Gillespie, A.R., Sollner, T.C.L.G. and Phillips, T.G. 1977, Astron. Astrophys. 54, 955.Google Scholar
Kutner, M.L. and Ulich, B.L. 1981, Astrophys. J. 250, 341.Google Scholar
Myers, P.C., Linke, R.A. and Benson, P.J. 1983, Astrophys. J. 264, 517.Google Scholar
Otrupcek, R.E. and Wang, J.-S. 1987, Proc. Astron. Soc. Aust. 7, 194.Google Scholar
Robinson, B.J., McCutcheon, W.H. and Whiteoak, J.B. 1982, Int. J. Infrared Millimetre Waves 3,63.Google Scholar
Snell, R.L., Loren, R.B. and Plambeck, R.L. 1980, Astrophys. J. 239, L17.Google Scholar
Ulich, B.L. and Haas, R.W. 1976, Astrophys. J. 236, 192.Google Scholar
Wang, J.-S. and Otrupcek, R.E. 1987, Acta Astron. Sinica 28, 95.Google Scholar
Wang, J.-S., Robinson, B.J., Huang, G.-C. and Otrupcek, R.E. 1987, in Astrochemistry (IAU Symp. 120), Reidel, Dordrecht, 135.CrossRefGoogle Scholar
Wang, J.-S. and Otrupcek, R.E. 1988, Vistas in Astron. 31, 493.Google Scholar
Wang, J.-S., Robinson, B.J., Huang, G.-C. and Otrupcek, R.E. 1989, Proc. Astron. Soc. Aust., in press.Google Scholar