IRAS OBSERVATIONS OF THE EXCITING STARS OF HERBIG-HARO OBJECTS .2. THE REIPURTH AND GRAHAM SAMPLE AND LOW-RESOLUTION SPECTRA

Using IRAS COADDed images, candidates are suggested for the exciting stars of Herbig-Haro objects from the Reipurth and Graham sample. Some are too faint to have been included in the IRAS Point Source Catalog. No new examples of extended far-infrared emission are found, associated with these flows. The IRAS low-resolution spectrometer provides spectra for 20 of the 46 candidate stars so far identified as exciting young, unevolved H-H systems. These reveal 10 μm silicate absorption features, or are too red to show detectable flux near 10 μm. The histogram of bolometric luminosities for 46 young Herbig-Haro exciting stars has a median of 13 L⊙ and a mode between 16 and 32 L⊙. Although the enlarged sample of known exciting stars has more of the higher luminosity objects than an earlier sample, the histogram still represents a generally low-luminosity distribution (83% below 64 L⊙).