Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....90..176w&link_type=abstract
Astronomy and Astrophysics, vol. 90, no. 1-2, Oct. 1980, p. 176-183.
Astronomy and Astrophysics
Astrophysics
13
Absorption Spectra, Hydrogen Clouds, Interstellar Gas, Self Absorption, Astronomical Maps, Hydrogen Atoms, Line Spectra, Radiative Transfer, Spectral Line Width
Scientific paper
The dark cloud Lynds 134 has been mapped in the 21-cm H I line using the 100-m telescope at Effelsberg and the 64-m telescope at Parkes. Two narrow self-absorption lines were detected: Comp. A at 2.7 km/s and Comp. B at 0.7 km/s. Comp. A is the counterpart of molecular lines in L 134 and coincides with the maximum of optical absorption; Comp. B is probably a point source and is situated well outside the optically opaque area, about 13 arcmin to the southeast of Comp. A. Least-squares fits of a radiative transfer model to the absorption lines give spin temperatures in the ranges 5-12 and 10-20 K for Comp. A and Comp. B, respectively.
Goss William Miller
Grasshoff Matthias
Sancisi Renzo
Winnberg Anders
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