J/A+A/357/572 Dust formation in WC stars (Cherchneff+, 2000)
Dust formation in carbon-rich Wolf-Rayet stars
I. Chemistry of small carbon clusters and silicon species
Cherchneff I., Le Teuff Y.H., Williams P.M., Tielens A.G.G.M.
<Astron. Astrophys. 357, 572 (2000)>
=2000A&A...357..572C 2000A&A...357..572C
ADC_Keywords: Stars, Wolf-Rayet ; Stars, carbon ; Models, evolutionary
Keywords: molecular data - molecular processes - stars: circumstellar matter -
stars: Wolf-Rayet
Description:
The following table gives the ratefile of the chemical model. Columns
α, β and γ give the rate k at temperature T in the
Arrhenius form:
k = α * (T/300)β * exp(-γ/T)
The arrows indicate reversible reactions.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea.dat 102 407 Reaction data file
--------------------------------------------------------------------------------
See also:
III/85 : Sixth Catalogue of Galactic Wolf-Rayet Stars (van der Hucht+ 1981)
III/136 : Optical spectrophotometry of Wolf-Rayet stars (Torres+ 1987)
J/A+A/330/676 : IRC+10216 Silicon and sulfur chemistry (Willacy+ 1998)
Byte-by-byte Description of file: tablea.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
2- 5 I4 --- Index Number of reaction
7- 13 A7 --- R1 Reactant 1
15- 21 A7 --- R2 Reactant 2
23- 29 A7 --- R3 Reactant 3
31- 37 A7 --- P1 Product 1
39- 45 A7 --- P2 Product 2
47- 53 A7 --- P3 Product 3
54- 61 E8.2 cm3/s alpha α coefficient (1)
62- 67 F6.2 --- beta β coefficient (1)
68- 76 F9.1 K gamma γ coefficient (1)
78-100 A23 --- Ref Reference (2)
--------------------------------------------------------------------------------
Note (1): α is in units of cm6/s for thermolecular reactions
(index = 1-27) and in units of s-1 for photo processes (index = 55-108).
The rate k at temperature T is
k = α * (T/300)β * exp(-γ/T)
Note (2): References written in brackets as reactions refer to this reaction.
The format has been contracted so that (X Y Z > T U) means:
X + Y + Z --> T + U
References with an 'E' have an estimated rate, a 'C' a rate calculated
from cross sections.
References:
AH86 = Anicich & Huntress, 1986ApJS...62..553A 1986ApJS...62..553A
AS97 = Andreazza & Singh, 1997MNRAS.287..287A 1997MNRAS.287..287A
AVG93 = Anicich, 1993ApJS...84..215A 1993ApJS...84..215A
Baulch94 = Baulch et al., 1994, J. Phys. Chem. Ref. Data 23, 847
DDY90 = Dalgarno et al., 1990ApJ...349..675D 1990ApJ...349..675D
DP79 = Donnelly & Pasternack, 1979, Chem. Phys. 39, 427
FHFM79 = Filseth et al., 1979, Chem. Phys. Lett. 61, 288
MDM77 = Mann, 1977, Chem. Phys. Lett. 47, 106
NIST = Mallard et al., 1994, NIST Chemical Kinetics Database
PDAN89 = Petuchowski et al., 1989ApJ...342..406P 1989ApJ...342..406P
PST = 1988, Physica Scripta, volume T, 28
R95 = UMIST Database, 1995 version
RMW80 = Reisler et al., 1980, Chem. Phys. 47, 49
RW80 = Rakshit & Warneck, 1980, J. Chem. Soc. Farad. II 76, 1084
WC98 = Willacy & Cherchneff, 1998, Cat. J/A+A/330/676
WFB91 = Wlodek et al., 1991, J. Am. Chem. Soc. 113, 4461
--------------------------------------------------------------------------------
Acknowledgements: Yoann Henri Le Teuff
(End) Le Teuff [UMIST], Patricia Bauer [CDS] 11-May-2000