Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...326l..31r&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 326, March 1, 1988, p. L31-L34.
Astronomy and Astrophysics
Astrophysics
88
Abundance, Herbig-Haro Objects, Nebulae, Radio Observation, Shock Waves, Formyl Ions, Interferometry, Stellar Winds
Scientific paper
Observations of the region near the objects HH 7-11 were made with the Hat Creek millimeter interferometer. Aperture synthesis maps with 7arcsec-8arcsec resolution of the HCO+(J = 1→0) transition show a striking correlation of the peaks of line intensity with the positions of the optical HH objects. The velocities of the clumps of HCO+ emission are comparable to the systemic velocity of the cloud, implying that the clumps are almost stationary. This coincidence of quiescent almost stationary ambient gas with the fast-moving shock-excited HHs suggests that HH 7-11 are the shocked surfaces of stationary dense ambient cloudlets buffeted by a high-velocity stellar wind.
Rudolph Alexander
Welch William J.
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