1995A&A...294L..17S

Query : 1995A&A...294L..17S

1995A&A...294L..17S - Astronomy and Astrophysics, volume 294L17-20 (1995/2-1)

Atomic carbon in a dark cloud: TMC-1.

SCHILKE P., KEENE J., LE BOURLOT J., PINEAU DES FORETS G. and ROUEFF E.

Abstract (from CDS):

We report the first observations of the ³P₁-³P₀ line of atomic carbon in the dark cloud TMC-1. Additionally, to compare with CO, we observed ¹³CO(2-1), C¹⁸0(2-1) and C¹⁷0(2-1). The lines were observed at five positions perpendicular to the molecular ridge close to the cyanopolyyne peak. Optical depth effects render the determination of atomic carbon column densities difficult, so only lower limits of about 10¹⁷cm^–2 are reported. However, the widths and shapes of the carbon lines strongly suggest high optical depths, which would be an argument in favor of the existence of atomic carbon deep inside molecular clouds. A comparison of the observed intensities with the intensities predicted by a photochemical model of the cloud shows a reasonably good agreement, giving confidence in our understanding of the physical and chemical processes at the edges of dark clouds.

Abstract Copyright: ∼

Journal keyword(s): interstellar medium: abundances - interstellar medium: atoms - interstellar medium: clouds - interstellar medium: individual objects: TMC 1 - radio lines: atomic - radio lines: molecular: interstellar

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	TMC-1	MoC	04 41 45.9	+25 41 27						~	1872	0

Query : 1995A&A...294L..17S

Basic data :

TMC-1 -- Molecular Cloud
Other object types:	`PoC (MLB,[MOH94])`, `MoC (TMC)`, `Cld (HCL)`
ICRS coord. (ep=J2000) :	`04 41 45.9 +25 41 27 [ ] D 1983ApJ...264..517M`
FK4 coord. (ep=B1950 eq=1950) :	`04 38 42.0 +25 35 45 [ ]`
Gal coord. (ep=J2000) :	`174.3852 -13.4312 [ ]`

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HCL 2 MLB 3-28 TMC-1 [MOH94] 6

References (1872 between 1850 and 2026) (Total 1872)
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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