2001MNRAS.322..770R

Query : 2001MNRAS.322..770R

2001MNRAS.322..770R - Mon. Not. R. Astron. Soc., 322, 770-778 (2001/April-3)

New models of interstellar gas-grain chemistry - II. Surface photochemistry in quiescent cores.

RUFFLE D.P. and HERBST E.

Abstract (from CDS):

The photodissociation of surface species, caused by photons from the cosmic-ray-induced and background interstellar radiation fields, is incorporated into our combined gas-phase and grain-surface chemical models of quiescent dense interstellar cores. For the cores studied here, only cosmic-ray-induced photons are important. We find that photodissociation alters gas-phase and surface abundances mainly at large cloud ages (≳106–7yr). The abundances of those surface species, such as H2O, that are readily reproduced on the surface following photodissociation are not strongly affected at any time. The abundances of surface species that are, on the other hand, reformed slowly via surface reactions possessing activation energy (e.g. CH3OH) are reduced, while the abundances of associated surface photoproducts (e.g. CO) increase. In the gas phase, inclusion of surface photodissociation tends to increase molecular abundances at late times, slightly improving the agreement with observation for TMC-1.

Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): astrochemistry - molecular processes - stars: formation - ISM: abundances - ISM: clouds - ISM: molecules

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 : 2001MNRAS.322..770R

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)
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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