Other
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.261..371d&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 261, no. 2, p. 371-378.
Other
12
Ammonia, Herbig-Haro Objects, Interstellar Gas, Molecular Gases, Interstellar Chemistry, Optical Thickness
Scientific paper
Single-dish observations in HCO(+) J = 4-3 are presented of the regions around HH34 and around HH34IRS. The former is one of the best examples of the association between Herbig-Haro shocks, optical jets, and young stellar objects. The HCO(+) and CS maps peak toward the outflow source HH34IRS and suggest the presence of a hot dense molecular core. The NH3 is confined to a peak about 4-0 arcsec east of HH34IRS and to a ridge which extends in a north-south direction and peaks about 20 arcsec south of the end of the optical jet. Thus, the NH3 observations do not trace the underlying gas density and temperature in this outflow source. Toward HH34IRS the NH3 column density is less by a factor of about 10 than toward the NH3 peak position is the HH34 region, providing evidence that the NH3 is underabundant towards the central exciting stars. This underabundance may explain the toroidal structures often seen in NH3 observations of other outflow sources.
Davis Christopher J.
Dent William R. F.
No associations
LandOfFree
Molecular observations of HH34 - Does NH3 accurately trace dense molecular gas near young stars? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Molecular observations of HH34 - Does NH3 accurately trace dense molecular gas near young stars?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molecular observations of HH34 - Does NH3 accurately trace dense molecular gas near young stars? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1705810