Ammonia observations of the Herbig-Haro objects HH24-27

Details Ammonia observations of the Herbig-Haro objects HH24-27 Ammonia observations of the Herbig-Haro objects HH24-27

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.205..123m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 205, Oct. 1983, p. 123-130.

Other

19

Ammonia, Astronomical Maps, Herbig-Haro Objects, Interstellar Gas, Astronomical Coordinates, Carbon Monoxide, Emission Spectra, Line Spectra, Molecular Spectroscopy

Scientific paper

The region centred on HH25 has been mapped in the J = 1, K = 1 inversion line of ammonia, with spatial and velocity resolutions of 2.2 arcmin and 0.43 km s-1 respectively. The ammonia emission covers the known centres of activity HH24-26, including the recently observed bipolar CO outflows. Its spatial distribution relative to the outflows probably implies a disc structure (of mass ≡70 - 210 M_sun;), with the bipolar outflow perpendicular to the faces of the disc. The derived particle density of ≡(1 - 3)×104 cm-3 is in reasonable agreement with values deduced from other molecular lines. The abundance ratio of ammonia is estimated to be NNH3/NH2 ≡ 1×10-8.

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