Computer Science
Scientific paper
Mar 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.427..449c&link_type=abstract
The Universe as Seen by ISO. Eds. P. Cox & M. F. Kessler. ESA-SP 427., p. 449
Computer Science
12
Outflows, Protostars
Scientific paper
We present results from the ISOCAM central program on the bipolar molecular flows L 1157 and HH 54. We find that mid-infrared cooling is dominated by pure rotational lines of H2 probing excitation temperatures in the range 350-1200 K, lower than inferred for ro-vibrational lines. The ortho/para ratio ranges from 3 to 1, and shows strong spatial variations within HH 54. Emission properties are consistent with low-velocity non-dissociative shocks of pre-shock density ~ 104 cm-3. Under the hypothesis of planar 20 km s-1 C-shocks, rotational H2 lines would be the major shock coolant. The resulting shock mechanical luminosity is compatible with the total kinetic energy input rate inferred from CO observations, indicating that these localized shocks may have enough power to accelerate the whole molecular outflow lobes. The non-detection of [Ne II]12.8μm suggests that protostellar winds from low-luminosity sources are less dense and/or more collimated than those from high luminosity sources such as Cep A.
Andr'e P.
Bontemps Sylvain
Boulanger Francois
Cabrit Silvie
Cesarsky Catherine J.
No associations
LandOfFree
ISOCAM mapping and spectro-imaging of bipolar outflows does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with ISOCAM mapping and spectro-imaging of bipolar outflows, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ISOCAM mapping and spectro-imaging of bipolar outflows will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1446681