Far-infrared observations of the exciting stars of Herbig-Haro objects. III - Circumstellar disks

Astronomy and Astrophysics – Astronomy

Scientific paper

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Herbig-Haro Objects, Infrared Astronomy, Stellar Envelopes, Stellar Spectra, Disks (Shapes), Far Infrared Radiation, Pre-Main Sequence Stars, Stellar Luminosity

Scientific paper

Far-infrared observations of the exciting stars of Herbig-Haro objects are presented that (1) show these stars to be of low luminosity; (2) indicate that it is not usual for these objects themselves to be visible at far-infrared wavelengths; and (3) demonstrate the existence of spatially resolved, physically large, potentially disklike structures. These latter structures are resolved perpendicular to the directions of flow from the stars, but not parallel to the flows. In addition to these general properties, two new HH-exciting stars were discovered by searching along the extrapolated proper motion vectors for these HHs; and the jetlike object 'DG Tau B' was also detected.

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