Detection of high velocity emission in NH3(1, 1) and (2, 2) spectra towards NGC 2071

Details Detection of high velocity emission in NH3(1, 1) and (2, 2) spectra towards NGC 2071 Detection of high velocity emission in NH3(1, 1) and (2, 2) spectra towards NGC 2071

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...144l..20t&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 144, no. 2, March 1985, p. L20-L22. Sponsorship: Deutsche Forschungsgemeinscha

Astronomy and Astrophysics

Astronomy

10

Ammonia, Emission Spectra, Molecular Clouds, Radial Velocity, Radio Sources (Astronomy), Reflection Nebulae, Radio Spectra, Spectral Line Width, Stellar Evolution

Scientific paper

High signal-to-noise NH3 (J,K) = (1,1) and (2,2) spectra observed with the 100 m radiotelescope towards the central position of the reflection nebula NGC 2071 reveal high velocity emission of Δv ≡ 11 km/s width superimposed on a spike (Δv = 0.7 km/s) and a narrow (Δv = 1.8 km/s) molecular emission line. The rotational temperature of the high velocity outflowing gas is determined to be close to 35K, suggesting a somewhat higher kinetic temperature ≡45K. The small beam filling factor ≡1% shows that the NH3 originates from a gas with clumpy or filamentary structure on the scale of 10-2pc.

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