J/MNRAS/382/553 Abundances of nearby red clump giants (Liu+, 2007)
The abundances of nearby red clump giants.
Liu Y.J., Zhao G., Shi J.R., Pietrzynski G., Gieren W.
<Mon. Not. R. Astron. Soc., 382, 553-566 (2007)>
=2007MNRAS.382..553L 2007MNRAS.382..553L
ADC_Keywords: Stars, nearby ; Stars, giant ; Abundances
Keywords: stars: abundances - stars: atmospheres - stars: late-type
Abstract:
Based on the analysis of high-resolution spectra with a high
signal-to-noise ratio, we have determined the abundances of the
alpha-elements O, Si, Ca and Ti, the iron peak elements V, Fe and Ni,
and the heavy element Ba without the consideration of non-local
thermodynamic equilibrium (NLTE) effect and the light neutron-rich
elements Na, Mg and Al with an NLTE analysis for 63 nearby red clump
giants. Fe abundances cover a logarithmic range between 0.60 and +0.35
relative to solar. All abundance ratios with respect to Fe are similar
to those found in the Sun. Hyperfine structure (HFS) was taken into
account when calculating V lines. The difference in abundances
obtained with and without HFS can be as large as 0.5 dex.
Description:
We selected 76 Southern hemisphere stars from Paczyski et al. (1999,
Cat. J/AcA/49/319) who published a sample of 308 red clump giants
selected from the Hipparcos catalogue with a relative parallax error
of less than 10 per cent. The stars were observed with the Fiber-fed
Extended Range Optical Spectrograph (FEROS), which was attached to the
1.52-m telescope of the ESO (La Silla, Chile), in 2002 August.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 48 14238 All atomic-line data used and EW values of
programme stars
table2.dat 33 63 The effective temperatures derived from
different colour indices
table3.dat 70 63 Basic stellar parameters of 63 nearby
red clump giants
table4.dat 70 22 The comparison of stellar parameters of 22 stars
common with the sample McW90 (1990ApJS...74.1075M 1990ApJS...74.1075M)
table7.dat 45 63 The abundance determined by LTE and NLTE
analysis for Na, Mg and Al of 63 nearby red
clump giants relative to Fe
table8.dat 45 63 Abundances of six elements for the 63 nearby
red clump giants relative to Fe
table9.dat 72 63 O abundance derived from triplet LTE results and
after correction according to Takeda (2003,
Cat. J/A+A/402/343)
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See also:
J/A+A/402/343 : IR O I triplet, [O I] lines in F-K dwarfs/giants (Takeda, 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Star HD name
11- 14 A4 --- Ion Ion designation
16- 23 F8.3 0.1nm lambda Wavelength
25- 29 F5.2 eV EP Excitation potential
32- 36 F5.2 --- loggf log of Oscillator Strength
39- 42 F4.2 --- f6 Enhancement factor
44- 48 F5.1 0.1nm EW ?=-99.9 Line equivalent width
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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- 9 A9 --- Star HD name
12- 17 I6 --- HIP HIP number
20- 23 I4 K Teff(B-V) Effective temperature derived from
B-V colour index
25- 28 I4 K Teff(b-y) ? Effective temperature derived from
b-y colour index
30- 33 I4 K Teff(V-K) Effective temperature derived from
V-K colour index
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Star HD name
11- 15 F5.3 mag Vmag V magnitude
17- 21 F5.3 mag VMAG Absolute V magnitude
23- 26 I4 K Teff Effective temperature
28- 31 F4.2 [cm/s2] logg Surface gravity
33- 37 F5.2 [Sun] [M/H] Metal abundance
39- 41 F3.1 km/s vt Microturbulent velocity
43- 46 F4.2 solMass Mass Mass
48- 52 F5.2 mas plx Parallax
54- 57 F4.2 mas e_plx rms uncertainty on Plx
59- 64 F6.3 mag BC Bolometric correction
66- 70 F5.2 [Sun] [Fe/H] Metallicity
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Star HD name
11- 14 I4 K Teff Effective temperature
16- 19 I4 K TeffMc Effective temperature from 1990ApJS...74.1075M 1990ApJS...74.1075M
21- 24 F4.2 [cm/s2] logg Surface gravity
26- 29 F4.2 [cm/s2] loggMc Surface gravity from 1990ApJS...74.1075M 1990ApJS...74.1075M
31- 35 F5.2 [Sun] [Fe/H] Metallicity
37- 41 F5.2 [Sun] [Fe/H]Mc Metallicity from 1990ApJS...74.1075M 1990ApJS...74.1075M
43- 45 F3.1 km/s vt Microturbulent velocity
47- 49 F3.1 km/s vtMc Microturbulent velocity in 1990ApJS...74.1075M 1990ApJS...74.1075M
51- 53 I3 K DTeff Effective temperature difference
55- 59 F5.2 [cm/s2] Dlogg Surface gravity difference
61- 65 F5.2 [Sun] D[Fe/H] Metallicity difference
67- 70 F4.1 km/s Dvt Microturbulent velocity difference
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Star HD name
11- 15 F5.2 [Sun] [Na/Fe]e Na abundance relative to Fe from LTE analysis
17- 21 F5.2 [Sun] [Na/Fe]n Na abundance relative to Fe from NLTE analysis
23- 27 F5.2 [Sun] [Mg/Fe]e Mg abundance relative to Fe from LTE analysis
29- 33 F5.2 [Sun] [Mg/Fe]n Mg abundance relative to Fe from NLTE analysis
35- 39 F5.2 [Sun] [Al/Fe]e Al abundance relative to Fe from LTE analysis
41- 45 F5.2 [Sun] [Al/Fe]n Al abundance relative to Fe from NLTE analysis
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Star HD name
11- 15 F5.2 [Sun] [Ca/Fe] Ca abundance relative to Fe
17- 21 F5.2 [Sun] [Si/Fe] Si abundance relative to Fe
23- 27 F5.2 [Sun] [Ti/Fe] Ti abundance relative to Fe
29- 33 F5.2 [Sun] [Ni/Fe] Ni abundance relative to Fe
35- 39 F5.2 [Sun] [V/Fe] V abundance relative to Fe
41- 45 F5.2 [Sun] [Ba/Fe] Ba abundance relative to Fe
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Star HD name
11- 14 F4.1 0.1nm EW7772 ? [O/Fe]7772Å equivalent width
16- 19 F4.1 0.1nm EW7774 ? [O/Fe]7774Å equivalent width
21- 24 F4.1 0.1nm EW7775 ? [O/Fe]7775Å equivalent width
26- 30 F5.2 [Sun] [O/Fe]7772 LTE [O/Fe]7772 abundance
32- 36 F5.2 [Sun] [O/Fe]7774 ? LTE [O/Fe]7774Å abundance
38- 42 F5.2 [Sun] [O/Fe]7775 LTE [O/Fe]7775Å abundance
44- 48 F5.2 [Sun] [O/Fe] LTE [O/Fe] abundance
50- 54 F5.2 [Sun] [O/Fe]7772c LTE [O/Fe]7772Å abundance after correction
according to Takeda (2003, J/A+A/402/343)
56- 60 F5.2 [Sun] [O/Fe]7774c LTE [O/Fe]7774Å abundance after correction
according to Takeda (2003, J/A+A/402/343)
62- 66 F5.2 [Sun] [O/Fe]7775c LTE [O/Fe]7775Å abundance after correction
according to Takeda (2003, J/A+A/402/343)
68- 72 F5.2 [Sun] [O/Fe]c LTE [O/Fe]Å abundance after correction
according to Takeda (2003, J/A+A/402/343)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 10-Nov-2008