The jet and energy source of HH 34

Details The jet and energy source of HH 34 The jet and energy source of HH 34

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...164...51r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 164, no. 1, Aug. 1986, p. 51-66. Research supported by the Danish Board for As

Astronomy and Astrophysics

Astronomy

172

Herbig-Haro Objects, Jet Flow, Pre-Main Sequence Stars, Astronomical Models, Astronomical Spectroscopy, Calcium, Hydrogen, Infrared Astronomy, Kinematics, Millimeter Waves, Molecular Clouds, Star Formation

Scientific paper

HH 34 is characterized on the basis of CCD optical images obtained with the 1.5-m ESO Danish telescope in December 1982 and January 1985, 600-900-nm and 645-680-nm spectra obtained with a CCD detector on the 4-m CTIO telescope in January 1985, NIR photometry obtained with the UKIRT in December 1984, 2.12-micron H2 observations obtained with the 7-m KPNO telescope in December 1984, and (C-12)O, CS, and (C-13)O radio observations obtained with the 7-m mm-wave antenna at Crawford Hill during January-April 1985. The data are presented in tables, graphs, contour maps, spectra, and images and discussed in detail. A highly collimated six-knot shock-excited jet of length about 8000 AU and heliocentric radial velocity about -60 km/s is found to extend toward HH 34 from a 0.5-solar-luminosity low-mass premain-sequence star with an emission-line spectrum, red continuum, and NIR excess. The jet knots are shown to be surrounded by a tenuous bow-shaped envelope, while the jet source is embedded in a 0.1-pc-diameter 4-solar-mass molecular-cloud clump with mean H2 volume density greater than 10,000/cu cm.

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