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Observations of the 126α Line of Excited Hydrogen in Southern HII Regions

Published online by Cambridge University Press:  25 April 2016

F. F. Gardner  and
R. X. McGee
F. F. Gardner
Affiliation:
Division of Radiophysics, CSIRO, Sydney
R. X. McGee
Affiliation:
Division of Radiophysics, CSIRO, Sydney
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Extract

A search for the 126a hydrogen recombination line, with a rest frequency of 3248.713 MHz, has been made in the 19 sources listed in Table I using the Parkes telescope. The beamwidth was 6′ are and the frequency resolution 37 kHz. In the Table RCW refers to the Rodgers, Campbell and Whiteoak Atlas, W to the Westerhout catalogue, and the co-ordinate numbers to the Parkes Catalogue of Sources. In each case the ratio of the peak of the line to the continuum TL/TC, the half-intensity width Δv and the mean radial velocity to the local standard of rest, were determined. The related velocities observed in OH emission and absorption are also shown.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 1 , Issue 1 , January 1967 , pp. 19
Copyright
Copyright © Astronomical Society of Australia 1967

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References

1 Hoglund, B., and Mezger, P. C., 1965.—Science, 150, 339.Google Scholar
2 Kardashev, N. S., 1960.—Soviet AJ., 3, 813.Google Scholar
3 Goldberg, L., 1966.—Ap. J., 144, 1225.Google Scholar