Correlations between NH3 (1.1) and far-IR emission.
Abstract
NH3 (1,1 and 2,2) observations obtained using a 1024-channel autocorrelator and K-band maser amplifier at the 100-m Effelsberg radio telescope (angular resolution 40 arcsec at 1.3 cm; velocity resolution 0.16 km/s; rms error 0.1 K) are reported for six Taurus-region IRAS sources for which the 100-micron flux is greater than the 60-micron flux. The data are presented in maps and tables and compared with the IRAS FIR data in graphs. A strong correlation between the NH3 line intensity and the 100-micron flux and an anticorrelation between peak main-beam brightness temperature and Delta-V (where V is the line velocity) are observed and found to be consistent with the hypothesis of Henriksen and Turner (1984), that the velocity field in molecular clouds is controlled by star/cloud turbulence, with a conversion of small-scale angular momentum to larger-scale turbulence.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 1986
- Bibcode:
- 1986A&A...161..150S
- Keywords:
-
- Far Infrared Radiation;
- Infrared Astronomy Satellite;
- Molecular Clouds;
- Protostars;
- Stellar Evolution;
- Ammonia;
- Autocorrelation;
- Kinetic Energy;
- Spectral Line Width;
- Astrophysics