1999A&A...344..687H


Query : 1999A&A...344..687H

1999A&A...344..687H - Astronomy and Astrophysics, volume 344, 687-695 (1999/4-2)

Temperature predictions for protostellar outflows.

HATCHELL J., FULLER G.A. and LADD E.F.

Abstract (from CDS):

The acceleration mechanism for protostellar outflows is still uncertain, despite many dynamical studies. Active acceleration processes are expected to heat the molecular gas, and it should be possible to choose between the possible outflow models by excitation studies which measure the temperature of the molecular gas. We show how temperature predictions can be made from a simple bow-shock driven shell model and compared with temperature estimates from excitation studies. As the momentum-conserving shell expands the kinetic energy lost is sufficient to heat the molecular gas to temperatures many times that of the ambient cloud. The energy transfer - and therefore the temperature - is greatest near to the bow shock and therefore the temperature rises with distance from the star. We present a multitransition CO study of the young outflow L483 and compare temperature predictions from the shell model with measurements of the CO excitation.

Abstract Copyright:

Journal keyword(s): ISM: kinematics and dynamics - ISM: jets and outflows - stars: formation - ISM: molecules - ISM: abundances

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 LDN 1448 DNe 03 22.5 +30 35           ~ 496 0
2 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 789 1
3 HH 111 HH 05 51 44.2 +02 48 34           ~ 397 0
4 NAME LDN 483 FIR Y*O 18 17 29.8 -04 39 38           ~ 63 0
5 LDN 483 DNe 18 17 35 -04 39.8           ~ 258 0
6 LDN 1157 DNe 20 39 06.4 +68 02 13           ~ 536 0

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2022.05.23-11:16:18

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