Issue |
A&A
Volume 369, Number 1, April I 2001
|
|
---|---|---|
Page(s) | 155 - 169 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361:20010097 | |
Published online | 15 April 2001 |
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
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.
Key words: interstellar medium: dust / stars: circumstellar matter / formation
© ESO, 2001
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