Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...220..249r&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 220, no. 1-2, Aug. 1989, p. 249-268. Research supported by the European Southe
Astronomy and Astrophysics
Astronomy
94
Early Stars, Herbig-Haro Objects, Infrared Spectroscopy, Orion Nebula, Pre-Main Sequence Stars, Infrared Astronomy Satellite, Molecular Clouds, Stellar Mass Ejection
Scientific paper
Detailed interference filter CCD imaging and spectroscopic data are presented for 10 Herbig-Haro objects and their individual knots in optical outflows from young stars in L1641 and L1630. Eight of these objects are newly found and their HH-nature is demonstrated here. The object HH83 consists of a 32 arcsec long jet emerging from a 10.5 solar luminosity IRAS source which illuminates edges of a conical cavity presumably excavated by a flow. HH84 and HH85 are long chains of HH knots outlining well-collimated optical flows, both of which are redshifted compared to the ambient clouds. HH45 and HH95A belong, together with M16-HH1, in a curious class of HH objects with extremely faint forbidden O I 6300, 6363 A lines. It is demonstrated that six flows in the HH1/2 region share a preferred direction aligned along the observed local cloud magnetic field.
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