Observational evidence of a possible collimating agent of the HH1-2 outflow

Details Observational evidence of a possible collimating agent of the HH1-2 outflow Observational evidence of a possible collimating agent of the HH1-2 outflow

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...197..235m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 197, no. 1-2, May 1988, p. 235-241.

Astronomy and Astrophysics

Astrophysics

21

Ammonia, Collimation, Emission Spectra, Herbig-Haro Objects, Star Formation, Angular Resolution, Kinematics, Molecular Clouds, Rotating Disks, Spectral Resolution, Stellar Winds

Scientific paper

Using the 100-m antenna of the Max-Planck-Institut for Radioastronomie in Effelsberg, FRG, the authors have observed with 40arcsec resolution the region around the Herbig-Haro 1 and 2 objects in the (1,1) and (2,2) inversion lines of NH3. The integrated intensity peaks at a position equidistant from the objects HH 1 and 2 that coincides exactly with the central exciting source found by Pravdo et al. (1985). The emission region is elongated with its major axis roughly perpendicular to the line joining the HH 1 and 2 objects. By analyzing the kinematics, it is concluded that the structure is a relatively smooth, slowly rotating, and expanding (or infalling) disk seen nearly edge-on. The disk radial motion is resolved and occurs at a radius of ≡ 0.15 pc, and the center of the disk appears to be evacuated. This situation is consistent with the absence of centralized heating.

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