1999ApJ...513..287M

Query : 1999ApJ...513..287M

1999ApJ...513..287M - Astrophys. J., 513, 287-293 (1999/March-1)

New H and H2 reactions with small hydrocarbon ions and their roles in benzene synthesis in dense interstellar clouds.

McEWAN M.J., SCOTT G.B.I., ADAMS N.G., BABCOCK L.M., TERZIEVA R. and HERBST E.

Abstract (from CDS):

This paper summarizes the most recent knowledge concerning normal and three-body association ion-molecule reactions between small hydrocarbon ions (CmH+n; m=1-6, n=0-9) and the neutral reactants H and H2. Selected radiative association reaction rate coefficients have been calculated and estimated based on three-body laboratory results. Some of the normal and radiative association rate coefficients have been incorporated into our ``new standard'' model of dense cloud interstellar chemistry. We find that atomic H provides an insufficiently appreciated mechanism to increase the level of saturation of CmH+n ions, with m>3 in dense interstellar clouds despite the fact that the H/H2 abundance ratio is only 10–4. New model results show in particular that a significant abundance of the basic aromatic cyclic molecule benzene (c-C6H6) can now be produced in dense clouds.Subject headings:

Abstract Copyright: ∼

Journal keyword(s): ISM: Clouds - Molecular Processes

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 : 1999ApJ...513..287M

Basic data :
TMC-1 -- Molecular Cloud
Other object types: otypes_help 		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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Hierarchy : number of linked objects
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HCL 2 MLB 3-28 TMC-1 [MOH94] 6

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