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Table · dataset · 2021

Four Herbig-Haro objects SOFIA/FIFI-LS images

Listed in IVOA Registry (Virtual Observatory)

We present SOFIA/FIFI-LS observations of three Class 0 and one Class I outflows (Cep E, HH 1, HH 212, and L1551 IRS5) in the far-infrared [OI]63um and [OI]145um transitions.

Description

Spectroscopic [OI]63um maps enable us to infer the spatial extent of warm (T~500-1200K), low-excitation atomic gas within these protostellar outflows. Our main goal is to determine mass-loss rates from the obtained [OI]63um maps and compare these with accretion rates from other studies.

The far-infrared [OI]63um emission line is predicted to be the main coolant of dense, dissociative J-shocks caused by decelerated wind or jet shocks. If proper shock conditions prevail, the instantaneous mass-ejection rate is directly connected to the [OI]63um luminosity. In order to unravel evolutionary trends we analyse a set of 14 Class 0/I outflow sources that have been spatially resolved in the [OI]63um emission.

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We compare these data with a sample of 74 Class 0/I/II outflow sources that have been observed with Herschel (WISH, DIGIT, WILL, GASPS surveys) without spatially resolving the [OI]63um line.

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Stated by source
Infrared
Inferred from text
Image 65% · Stellar astronomy and planetary systems 78%
Provenance · 1 source records, 10 field assertions
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