J/A+A/425/187 Chemical abundances of 23 subgiants & giants (Thoren+, 2004)
Subgiants as probes of galactic chemical evolution.
Thoren P., Edvardsson B., Gustafsson B.
<Astron. Astrophys. 425, 187 (2004)>
=2004A&A...425..187T 2004A&A...425..187T (SIMBAD/NED BibCode)
ADC_Keywords: Stars, nearby ; Stars, giant ; Abundances, peculiar ;
Space velocities
Keywords: stars: abundances - stars: evolution
Description:
Chemical abundances, stellar parameters, and atomic and molecular line
data are given for a study of 23 subgiant and giant stars in the solar
vicinity. With the exception of Li and possibly C we show that
subgiant stars show no "chemical" traces of post-main-sequence
evolution and that they are therefore and because of their simple age
dating very useful targets for studies of galactic chemical evolution.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 46 149 Atomic line data
table2.dat 30 185 Molecular line data
table6.dat 264 23 Chemical abundances and stellar parameters
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See also:
J/A+A/275/101 : Chemical evolution of the galactic disk I. (Edvardsson+ 1993)
J/A+AS/102/603 : Chemical evolution of the galactic disk II. (Edvardsson+ 1993)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Elem Element
4- 5 A2 --- Ion Ionization state
(I: neutral, II: singly ionized)
7- 14 F8.3 0.1nm Lambda Air wavelength (Angstroem)
16- 21 F6.3 eV Exc Lower transition level excitation energy
23- 29 F7.3 --- loggf Logarithm of the oscillator strength value
31 I1 --- Dflag Pressure damping flag (1)
33- 36 F4.2 --- Dcorr ? Damping correction factor (1)
38- 46 E9.3 s-1 DRad Radiation damping
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Note (1):
- When Dflag = 1 (Quantum mechanics calculation), the hydrogen
collision broadening was adopted from Barklem & O'Mara
(1998MNRAS.300..863B 1998MNRAS.300..863B), and references therein.
- When Dflag = 0 (Unsoeld approximation), the hydrogen collision
broadening was calculated following Mihalas D. 1978, "Stellar
Atmospheres", (W.H. Freeman & Co., San Francisco),
(1978stat.book.....M 1978stat.book.....M) with the correction factor in column Dcorr
multiplied to the resulting broadening FWHM, Gamma
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 F8.3 0.1nm Lambda Air wavelength (Angstroem)
10- 14 F5.3 eV Exc Lower transition level excitation energy
16- 21 F6.3 --- loggf Logarithm of the oscillator strength value
23- 30 A8 --- Trans Identification
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD number
8- 10 A3 --- Class SGB = subgiant star, RGB = giant star
12- 15 I4 K Teff Effective temperature in K
17- 20 F4.2 [cm/s2] logg Log of surface gravity
22- 26 F5.2 [Sun] [M/H] Overall model metal abundance (1)
28- 31 F4.2 km/s xi Microturbulence parameter
33- 36 F4.2 mag VMAG Absolute V magnitude
38- 41 F4.1 Gyr Age Stellar age in gigayears
43- 45 F3.1 solMass Mass Stellar mass in solar units
47- 50 I4 km/s Uvel Stellar U velocity relative to the LSR (2)
52- 55 I4 km/s Vvel Stellar V velocity relative to the LSR
57- 60 I4 km/s Wvel Stellar W velocity relative to the LSR
62- 64 I3 km/s VelTot Stellar total velocity relative to the LSR
66- 70 F5.2 [Sun] ALi ? Lithium abundance or upper limit (1)
72- 72 I1 --- l_ALi [0,1]? Lithium abundance upper limit flag
(0: determination, 1: upper limit)
74- 78 F5.2 [Sun] ACI ? Carbon abundance from [C I] (1)
80- 84 F5.2 [Sun] ACH ? Carbon abundance from CH (1)
86- 90 F5.2 [Sun] AC2 ? Carbon abundance from C2 (1)
92- 93 I2 --- C12/C13 ? Carbon isotope abundance ratio C12/C13
95- 96 I2 --- e_C12/C13 ? rms uncertainty in C12/C13 ratio
98-102 F5.2 [Sun] ANI ? Nitrogen abundance from N I (1)
104-108 F5.2 [Sun] ANCN ? Nitrogen abundance from CN (1)
110-114 F5.2 [Sun] AOI ? Oxygen abundance mainly f. [O I] (1)
116-120 F5.2 [Sun] ANaI ? Sodium abundance from Na I (1)
122-126 F5.2 [Sun] AMgI ? Magnesium abundance from Mg I (1)
128-132 F5.2 [Sun] AMgH ? Magnesium abundance from MgH (1)
134-138 F5.2 [Sun] AAlI ? Aluminium abundance from Al I (1)
140-144 F5.2 [Sun] ASiI ? Silicon abundance from Si I (1)
146-150 F5.2 [Sun] ASiII ? Silicon abundance from Si II (1)
152-156 F5.2 [Sun] ASI ? Sulphur abundance from S I (1)
158-162 F5.2 [Sun] AKI ? Potassium abundance from K I (1)
164-168 F5.2 [Sun] ACaI ? Calcium abundance from Ca I (1)
170-174 F5.2 [Sun] AScII ? Scandium abundance from Sc II (1)
176-180 F5.2 [Sun] ATiI ? Titanium abundance from Ti I (1)
182-186 F5.2 [Sun] ATiII ? Titanium abundance from Ti II (1)
188-192 F5.2 [Sun] AVI ? Vanadium abundance from V I (1)
194-198 F5.2 [Sun] ACrI ? Chromium abundance from Cr I (1)
200-204 F5.2 [Sun] ACrII ? Chromium abundance from Cr II (1)
206-210 F5.2 [Sun] AFeI Iron abundance from Fe I (1)
212-216 F5.2 [Sun] AFeII ? Iron abundance from Fe II (1)
218-222 F5.2 [Sun] ACoI ? Cobalt abundance from Co I (1)
224-228 F5.2 [Sun] ANiI Nickel abundance from Ni I (1)
230-234 F5.2 [Sun] ACuI ? Cupper abundance from Cu I (1)
236-240 F5.2 [Sun] AZnI ? Zinc abundance from Zn I (1)
242-246 F5.2 [Sun] AYII ? Yttrium abundance from Y II (1)
248-252 F5.2 [Sun] AZrI ? Zirconium abundance from Zr I (1)
254-258 F5.2 [Sun] ANdII ? Neodymium abundance from Nd II (1)
260-264 F5.2 [Sun] Aalpha ? alpha-element abundance (3)
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Note (1): Abundances are expressed as the logarithm of the number
abundance of an element relative to hydrogen, and normalized to 0.0
for the Solar ratio
Note (2): The U velocity is positive in the direction of the galactic center
Note (3): The alpha element abundance is the straight mean value of the
abundances derived from Mg I, Si I, Ca I and Ti I
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Acknowledgements: Bengt Edvardsson
(End) Bengt Edvardsson [Uppsala Astronomical Observatory] 19-May-2004