Mm/Submm images of Herbig-Haro energy sources and candidate protostars

¹ Astronomisches Institut der Ruhr-Universität Bochum, Universitätsstr. 150/NA 7, 44780 Bochum, Germany
² Department of Physics and Astronomy, Cardiff University, PO Box 913, Cardiff, UK
³ CASA, University of Colorado, CB 389, Boulder, CO 80309, USA
⁴ IRAM, Avda. Divina Pastora 7, Nucleo Central, 18012 Granada, Spain

Corresponding author: R. Chini, chini@astro.ruhr-uni-bochum.de

Received: 19 September 2000
Accepted: 11 January 2001

Abstract

We present 450, 850 μm and 1300 μm images of regions with embedded candidate protostars. Some of them are associated with HH objects (HH 7-11, HH 1-2, HH 147, HH 111, HH 108) and have been previously identified in the course of a 1300 μm survey. Other regions were taken from the IRAS PSC (04239+2436, 04368+2557, 20050+2720, 20386+6751, 22134+5834, 23011+6126). The new mm/submm images show the detailed structure of the regions some of which contain new compact sources as well as extended emission features. The inferred mm/submm fluxes are combined with IRAS data in order to derive the temperature of the associated dust, its mass and the re-radiated luminosity. Taking the ratio of FIR-to-submm luminosity as an indicator for the evolutionary stage, we find that 15 out of 17 sources have , indicating that most objects are probably genuine protostars. For the first time, we detect dust emission associated with HH objects themselves, H₂ and CO flows which we interpret as density enhancements swept up by the ejected material.