Herbig-Haro objects as the heads of radiative jets

Details Herbig-Haro objects as the heads of radiative jets Herbig-Haro objects as the heads of radiative jets

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...337l..37b&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 337, Feb. 1, 1989, p. L37-L40. Research supported by Rockwell Int

Astronomy and Astrophysics

Astrophysics

82

Herbig-Haro Objects, Plasma Jets, Pre-Main Sequence Stars, Star Formation, Supersonic Jet Flow, Bow Waves, Emission Spectra, Gas Dynamics, Shock Waves

Scientific paper

The interpretation of certain HH objects as the heads of nonadiabatic supersonic jets is examined using two-dimensional numerical simulations. It is found that radiative jets develop a dense shell between the jet shock and the leading bow shock when the cooling distance behind either one of these shocks is smaller than the jet radius. It is proposed that the radiatively cooling shell may account for the variable emission pattern from objects like HH 1. Also, it is suggested that HH objects with measured space velocities that exceed the spectroscopically inferred shock velocities could correspond to heavy jets in which the bow shock is effectively adiabatic. Low-excitation objects in which these velocities are comparable may represent light jets where the jet shock is nonradiative.

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