1998A&A...332..703H

Query : 1998A&A...332..703H

1998A&A...332..703H - Astronomy and Astrophysics, volume 332703-713 (1998/4-2)

Monte Carlo simulations at very high optical depth: non-LTE transfer in H₂O in the protostellar object B335.

HARTSTEIN D. and LISEAU R.

Abstract (from CDS):

We present a formulation of the Monte Carlo method which should be capable of treating radiative transfer problems even at very high optical depths (τ≫10⁴) and apply this tool to predict rotational H₂O line spectra for the protostellar object B335 for future observational tests with space borne facilities. The physical model of the source is based on published observations in lines of CS, for which we obtain model results which are in agreement with previous computations. We apply our model also to line profiles of CO isotopomers observed at high spatial resolution and derive the total CO cooling rate for B335. From the comparison with the derived H₂O cooling rates, we are led to conclude, quite generally, that H₂O is probably not the major coolant of low-mass protostellar collapse.

Abstract Copyright: ∼

Journal keyword(s): ISM: clouds - ISM: individual objects: Barnard 335 - ISM: molecules - ISM: kinematics and dynamics - stars: formation - methods: numerical

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	LDN 663	DNe	19 36 55	+07 34.4						~	698	0

Query : 1998A&A...332..703H

Basic data :

LDN 663 -- Dark Cloud (nebula)
Other object types:	`DNe (LDN,Barnard)`, `MoC ([CB88])`, `glb (2013A&A)`, `smm (2013A&A)`
ICRS coord. (ep=J2000) :	`19 36 55.0 +07 34 24 [ ] E ~`
FK4 coord. (ep=B1950 eq=1950) :	`19 34 29.3 +07 27 38 [ ]`
Gal coord. (ep=J2000) :	`044.9227 -06.5358 [ ]`
Radial velocity / Redshift / cz :	`V(km/s) 8.15 [~] / z(~) 0.000027 [~] / cz 8.15 [~] D 1978ApJ...221L.117H`

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LDN 663 Barnard 335 [CB88] 199

References (698 between 1850 and 2026) (Total 698)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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