H76-alpha recombination line emission near SGR A
Abstract
Gardner and Whiteoak (1977) have observed the distribution of the H110-alpha recombination line emission (rest frequency 4.87 GHz) towards Sgr A with the aid of a 64-m telescope. The obtained results suggested that the emission was concentrated around the outer edge of the 'arc' of continuum radiation which extends 15 arc minutes to the north-east of the galactic nucleus. Pauls and Mezger (1980) conducted a survey of the H109-alpha line emission (5.01 GHz) with a 100-m telescope. Their results were in general similar to those obtained by Gardner and Whiteoak. The present investigation is concerned with a survey at the H76-alpha recombination line frequency (14.68999 GHz). Attention is given to the distribution of line temperature at velocity intervals of 8 km/s, the associated distribution of continuum emission, and a comparison of the obtained maps with the results reported by Gardner and Whiteoak.
- Publication:
-
Publications of the Astronomical Society of Australia
- Pub Date:
- 1982
- DOI:
- 10.1017/S1323358000021433
- Bibcode:
- 1982PASA....4..453W
- Keywords:
-
- Astronomical Spectroscopy;
- Emission Spectra;
- Galactic Nuclei;
- H Alpha Line;
- Continuous Radiation;
- Galactic Rotation;
- Spectral Energy Distribution;
- Stellar Evolution;
- Astrophysics