Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...379..676n&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 379, Oct. 1, 1991, p. 676-682.
Astronomy and Astrophysics
Astrophysics
27
Astronomical Models, Cosmic Dust, Herbig-Haro Objects, Light Scattering, Pre-Main Sequence Stars, Emission Spectra, Mathematical Models, Radiative Transfer, Stellar Envelopes, Stellar Spectrophotometry
Scientific paper
Recent spectrophotometric observations of the Herbig-Haro 1-2 system by Solf and Boehm show in the position-velocity diagrams of Herbig-Haro 1 a faint broad blueshifted emission in front of it. The effect appears strongly in the forbidden O I 6300/63 A and forbidden S II 6716/31 A emission lines. It is assumed that this emission is produced by light scattering by dust in the preshock region. A series of theoretical position-velocity diagrams in forbidden S II A 6731 is presented, based on the single-scattering approximation. The models assume a spherical emitting source moving through a stationary gas cloud. The theoretical position-velocity diagrams with optical depths between about 0.1 and 0.01 seem to account for the broad blueshifted emission and its integrated intensity.
Boehm Karl-Heinz
Calvet Nuria
Noriega-Crespo Alberto
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