The Carina Nebula at 3.4 and 6 CM

Details The Carina Nebula at 3.4 and 6 CM The Carina Nebula at 3.4 and 6 CM

Jun 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....41..153h&link_type=abstract

Astronomy and Astrophysics, vol. 41, no. 2, June 1975, p. 153-164.

Astronomy and Astrophysics

Astronomy

37

Astronomical Maps, Hydrogen Clouds, Microwave Emission, Nebulae, Radiative Recombination, Radio Astronomy, Extragalactic Radio Sources, H Lines, Line Spectra, Radial Velocity, Radiant Flux Density

Scientific paper

The Carina Nebula has been mapped at 3.4 cm with the 64-m Parkes radio telescope. At this wavelength the half-power beamwidth is 2.6 arcmin. Radio recombination-line observations of the nebula have been obtained at 6 and 3.4 cm (H 109-alpha and H 90-alpha). In the vicinity of Carina II, double line profiles with a separation of about 45 km/s are seen. These are interpreted in terms of an expanding sphere of ionized hydrogen. Carina I shows single profiles. The mean radial velocity of the observed lines is approximately constant over the whole nebula. Centered on the expanding region are two young galactic clusters: Truempler 14 and Truempler 16. It is suggested that they are responsible for the observed expansion.

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