TH28 (Krautter's star) and its string of Herbig-Haro objects

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Abstract
The authors have obtained an intermediate-resolution spectrum of the unusual emission-line star Th28 and its accompanying family of Herbig-Haro (HH) objects. They note a new HH object 87arcsecSE of the star along the axis defined by the other emission regions and point out that the more distant HH object, HH78, lies in this same direction and may also have been powered by Th28. Based on absorption and emission-line measurements the authors determine for the star a heliocentric velocity of +5 km s-1. They also present a low-resolution spectrum and infrared photometry for the star alone. A variety of emission lines are identified. The star has a moderate infrared excess between 1 and 3.5 μm showing the likely presence of heated dust in its immediate surroundings.

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