Infrared observations of low-mass star formation in Orion - HH objects

Astronomy and Astrophysics – Astronomy

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Herbig-Haro Objects, Infrared Astronomy, Orion Nebula, Star Formation, Angular Resolution, Energy Distribution, High Resolution, Stellar Luminosity, Stellar Mass

Scientific paper

The results of a preliminary analysis of IR data on Herbig-Haro objects in the Orion nebula are reported. The observations were made with the high angular resolution IR photometry equipment on the NASA Kuiper Airborne Observatory and the NASA facility on Mauna Kea, HI. Data were taken in the 1-200 microns region with 40, 6, and 8 arcsec resolution. Attention was focused on NGC 1999 (HH1-3) and M78 (HH24-25) and the determination of absolute luminosities of the exciting stars. Measurements were also made of the IR energy distribution in the thermally emitting dust clouds and the point sources. Herbig-Haro objects featured compact and far IR sizes and large visual extinction, in addition to a steeply rising energy distribution up to 50-100 microns, where the luminosity emitted was concentrated.

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