Hostname: page-component-78c5997874-8bhkd Total loading time: 0 Render date: 2024-11-09T20:47:02.675Z Has data issue: false hasContentIssue false
  • English
  • Français

Interstellar Nal Absorption Towards the Stellar Association Ara OB1

Published online by Cambridge University Press:  25 April 2016

J. B. Whiteoak  and
F. F. Gardner
J. B. Whiteoak
Affiliation:
Division of Radiophysics, CSIRO, Sydney
F. F. Gardner
Affiliation:
Division of Radiophysics, CSIRO, Sydney
Get access Rights & Permissions [Opens in a new window]

Abstract

Observations have been made of the interstellar D-line absorption of Nal towards a loose grouping of OB stars (containing the association Ara OB1 and probably the Hα emission regions RCW 107 and 108) centred at 1 = 337°.5 and b= -0°.5. The individual absorption spectra contain several velocity components which show well-defined groupings at –37, –18 and 0 km s-1. The corresponding median optical depths are 2, 7 and 6. The evidence indicates that both the –37 and –18 km s-1 Nal clouds are located in the Carina-Sagittarius spiral arm. Several HII regions are located at similar longitudes, but most are close to zero latitude and are more distant than the arm.

The association contains the galactic cluster NGC 6193. The results suggest that the turbulence seen optically towards this cluster has been caused by the interaction between two cloud groups moving towards each other at velocities of 10 to 15 km s-1.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 6 , Issue 2 , 1985 , pp. 164 - 171
Copyright
Copyright © Astronomical Society of Australia 1985

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Becker, W., and Fenkart, R. P., 1971, Astron. Astrophys. Suppl. Ser., 4, 241.Google Scholar
Catchpole, K. M., and Feast, M. W., 1970, Observatory, 90, 136.Google Scholar
Dachs, J., Kaiser, D., Nikolov, A., and Sherwood, W. A., 1982, Astron. Astrophys. Suppl. Ser., 50, 261.Google Scholar
Feast, M. W., and Thackeray, A. D., 1957-63, Mem. R. Astron. Soc., 68, 173.Google Scholar
Feast, M. W., Thackeray, A. D., and Wesselink, A. J., 1955, Mem. R. Astron. Soc., 67, 51.Google Scholar
Fenkart, R. P., and Binggeli, B., 1979, Astron. Astrophys. Suppl. Ser., 35, 271.Google Scholar
Fitzgerald, M. P., Jackson, P. D., and Moffatt, A. F. J., 1977, Observatory, 97, 129.Google Scholar
Gardner, F. F., and Whiteoak, J. B., 1984, Mon. Not. R. Astron. Soc, 210, 23.CrossRefGoogle Scholar
Georgelin, Y. P., and Georgelin, Y. M., 1970, Astron. Astrophys., 6, 349.Google Scholar
Georgelin, Y. M., and Georgelin, Y. P., 1976, Astron. Astrophys., 49, 57.Google Scholar
Goss, W. M., Manchester, R. N., Brooks, J. W., Sinclair, M. W., Manefield, G. A., and Danziger, I. J., 1980, Mon. Not. R. Astron. Soc, 191, 533.Google Scholar
Haynes, R. F., Caswell, J. L., and Simons, L. W. J., 1978, Aust. J. Phys. Astrophys. Suppl., No. 48, 1.Google Scholar
Haynes, R. F., Caswell, J. L., and Simons, L. W. J., 1979, Aust. J. Phys. Astrophys. Suppl., No. 48, 1.Google Scholar
Herbst, W., and Havlen, R. J., 1977, Astron. Astrophys. Suppl. Ser., 30, 279.Google Scholar
Liszt, H. S., 1983, in ‘Surveys of the Southern Galaxy’ (ed. Burton, W. B. and Israel, F. P.) (Reidel: Dordrecht), p. 303.Google Scholar
Moffatt, A. F. J., and Vogt, N., 1973, Astron. Astrophys. Suppl. Ser., 10, 135.Google Scholar
Moffatt, A. F. J., and Vogt, N., 1975, Astron. Astrophys. Suppl. Ser., 20, 155.Google Scholar
Robinson, B. J., McCutcheon, W. H., Manchester, R. N., and Whiteoak, J. B., 1983, in ‘Surveys of the Southern Galaxy’ (ed. Burton, W. B. and Israel, F. P.) (Reidel: Dordrecht), p. 1.Google Scholar
Snow, T. P., and Joseph, C. L., 1985, Astrophys. J., 288, 277.Google Scholar
Thackeray, A. D., Tritton, S. B., and Walker, E. N., 1973, Mem. R. Astron. Soc, 77, 199.Google Scholar
Westerlund, B., 1960, Uppsala Astron. Obs. Medd., No. 133, 467.Google Scholar
Whiteoak, J. B., 1963, Mon. Not. R. Astron. Soc, 125, 105.Google Scholar
Whiteoak, J. B., and Gardner, F. F., 1974, Astron. Astrophys., 37, 389.Google Scholar
Whiteoak, J. B., and Gardner, F. F., 1980, Proc Astron. Soc Aust., 4, 95.Google Scholar