J/A+AS/123/305 Yields of intermediate mass stars (van den Hoek+ 1997)
New theoretical yields of intermediate mass stars
van den Hoek L.B., Groenewegen M.A.T.
<Astron. Astrophys. Suppl. Ser. 123, 305 (1997)>
=1997A&AS..123..305V 1997A&AS..123..305V
ADC_Keywords: Abundances ; Models, evolutionary
Keywords: stars: abundances, evolution, AGB - ISM: abundances -
galaxies: abundances
Description:
We present theoretical yields of H, 4He, 12C, 13C, 14N, and
16O for stars with initial masses between 0.8 and 8M☉ and
initial metallicities Z=0.001, 0.004, 0.008, 0.02, and 0.04. We use
the evolutionary tracks of the Geneva group up to the early asymptotic
giant branch (AGB) in combination with a synthetic thermal-pulsing AGB
evolution model to follow in detail the chemical evolution and mass
loss up to the end of the AGB including the first, second, and third
dredge-up phases. Most of the relations used are metallicity dependent
to make a realistic comparison with stars of different initial
abundances. The effect of Hot Bottom Burning (HBB) is included in an
approximate way. The metallicity dependent yields of intermediate mass
stars listed in tables (1-38) below are well suited for use in
galactic chemical evolution models.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tab2-21.dat 108 289 *Yields for η(AGB)=4, m(HBB)=0.8
tab22-31.dat 58 79 *Yields for η(AGB)=4, m(HBB)=0.9
table32.dat 88 16 Total H, He yields for synthetic pre-AGB evolution
model
tab33-38.dat 106 82 Yields for HBB=0.8
tables.tex 118 1525 LaTeX version of the tables
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Note on tab2-21.dat, tab22-31.dat: η(AGB) is the mass loss scaling parameter
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Byte-by-byte Description of file: tab2-21.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Yields Yield designation ("AGB", "Final AGB",
"Pre-AGB", "Total")
12- 16 F5.3 Sun Zini [0.001/0.04] Initial Z abundance
18- 20 F3.1 Msun Mini [0.8/8] Initial mass
22- 30 E9.3 --- H H yield
32- 39 E8.3 --- 4He 4He yield
41- 49 E9.3 --- 12C 12C yield
51- 59 E9.3 --- 13C 13C yield
61- 68 E8.3 --- 14N 14N yield
70- 78 E9.3 --- 16O 16O yield
80- 88 E9.3 --- CNO C+N+O yield
90- 98 E9.3 --- Total Yield of elements heavier than helium
100-103 F4.2 Msun Meject Ejected mass
105-108 F4.2 Msun Mend Mass of the end of phase (1)
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Note (1): Refers to pre-AGB, AGB and final AGB phases
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Byte-by-byte Description of file: tab22-31.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Yields Yields ("AGB" or "Final AGB")
11- 15 F5.3 Sun Zini [0.001/0.04] Initial Z abundance
17- 19 F3.1 Msun Mini [3/8] Initial mass
21- 29 E9.3 --- 12C C12 yield
31- 39 E9.3 --- 13C C13 yield
41- 48 E8.3 --- 14N N14 yield
50- 58 E9.3 --- 16O O16 yield
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Byte-by-byte Description of file: table32.dat
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Bytes Format Units Label Explanations
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1- 3 F3.1 Msun Mini [0.8/8] Initial mass
5- 12 E8.2 --- H1 H yield at Z = 0.001
14- 21 E8.2 --- 4He1 4He yield at Z = 0.001
22- 29 E8.2 --- H4 H yield at Z = 0.004
31- 37 E7.2 --- 4He4 4He yield at Z = 0.004
39- 46 E8.2 --- H8 H yield at Z = 0.008
48- 54 E7.2 --- 4He8 4He yield at Z = 0.008
56- 63 E8.2 --- H20 H yield at Z = 0.020
65- 71 E7.2 --- 4He20 4He yield at Z = 0.020
73- 80 E8.2 --- H40 H yield at Z = 0.040
82- 88 E7.2 --- 4He40 4He yield at Z = 0.040
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Byte-by-byte Description of file: tab33-38.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Yields Yields ("AGB", "Final", or "Total")
7- 11 F5.3 Sun Zini [0.001/0.004] Initial Z abundance
13 I1 --- eta(AGB) [1/2] Mass loss scaling parameter η(AGB)
15- 17 F3.1 Msun Mini [0.8/7] Initial mass
19- 27 E9.3 --- H H yield
29- 37 E9.3 --- 4He 4He yield
39- 47 E9.3 --- 12C 12C yield
49- 57 E9.3 --- 13C 13C yield
59- 66 E8.3 --- 14N 14N yield
68- 76 E9.3 --- 16O 16O yield
78- 86 E9.3 --- CNO C+N+O yield
88- 96 E9.3 --- Total Yield of element heavied than helium
98-101 F4.2 Msun Meject Ejected mass
103-106 F4.2 Msun Mend Mass of the end of phase (1)
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Note (1): Refers to pre-AGB, AGB and final AGB phases
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Table1: Initial element abundances adopted
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Element. Z=0.001 0.004 0.008 0.02 0.04
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H 0.756 0.744 0.728 0.68 0.62
4He 0.243 0.252 0.264 0.30 0.34
12C 2.24E-4 9.73E-4 1.79E-3 4.47E-3 9.73E-3
13C 0.04E-4 0.16E-4 0.29E-4 0.72E-4 1.56E-4
14N 0.70E-4 2.47E-4 5.59E-4 1.40E-3 2.47E-3
16O 5.31E-4 2.11E-3 4.24E-3 1.06E-2 2.11E-2
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Acknowledgements:
Bob van den Hoek
(End) Patricia Bauer [CDS] 09-Oct-1996