J/MNRAS/440/1095 Chemical analysis of CH stars (Karinkuzhi+, 2014)
Chemical analysis of CH stars.
I. Atmospheric parameters and elemental abundances.
Karinkuzhi D., Goswami A.
<Mon. Not. R. Astron. Soc., 440, 1095-1113 (2014)>
=2014MNRAS.440.1095K 2014MNRAS.440.1095K (SIMBAD/NED BibCode)
ADC_Keywords: Stars, carbon ; Stars, late-type ; Abundances ; Radial velocities
Keywords: stars: abundances - stars: carbon - stars: late-type -
stars: Population II
Abstract:
Results from high-resolution spectral analyses of a selected sample of
CH stars are presented. Detailed chemical composition studies of these
objects, which could reveal abundance patterns that in turn provide
information regarding nucleosynthesis and evolutionary status, are
scarce in the literature. We conducted detailed chemical composition
studies for these objects based on high-resolution (R∼42000) spectra.
The spectra were taken from the ELODIE archive and cover the
wavelength range from 3900 to 6800Å. We estimated the stellar
atmospheric parameters, the effective temperature Teff, the surface
gravity logg, and the metallicity [Fe/H] from local thermodynamic
equilibrium analyses using model atmospheres. Estimated temperatures
of these objects cover a wide range, from 4550 to 6030K. The surface
gravity ranges from 1.8 to 3.8, and the metallicity from -0.18 to
-1.4. We report updates on elemental abundances for several heavy
elements and present estimates of abundance ratios for Sr, Y, Zr, Ba,
La, Ce, Pr, Nd, Sm, Eu and Dy with respect to Fe. For the object HD
188650 we present the first abundance analysis results based on a
high-resolution spectrum. Enhancements of heavy elements relative to
Fe, which are characteristic of CH stars, are evident from our
analyses for most of the objects. A parametric model-based study was
performed to understand the relative contributions from the s- and
r-processes to the abundances of the heavy elements.
Description:
Program stars were selected from the CH star catalogue of Bartkevicius
(1996BaltA...5..217B 1996BaltA...5..217B). The spectra are taken from the ELODIE archive
(Moultaka et al., 2004PASP..116..693M 2004PASP..116..693M).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 67 10 Basic data for the program stars
table2.dat 29 10 Radial velocities for the program stars
table3.dat 70 10 Temperatures of the program stars from photometry
table4.dat 92 196 Fe lines used for deriving atmospheric parameters
table5.dat 36 10 Derived atmospheric parameters for the program
stars
table6.dat 148 10 Elemental abundances for the program stars
table7.dat 34 13 Observed values for [Fe/H], [ls/Fe], [hs/Fe]
and [hs/ls] for the program stars
table8.dat 95 141 Equivalent widths of lines used for the
calculation of light element abundances
for the program stars
table9.dat 95 101 Equivalent widths of lines used for the
calculation of heavy element abundances
for the program stars
table10.dat 33 31 Atmospheric parameters from the literature
table11.dat 77 21 Elemental abundances from the literature
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See also:
V/81 : Taxonomy of Barium Stars (Lu, 1991)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Star name
11- 12 I2 h RAh Right ascension (J2000)
14- 15 I2 min RAm Right ascension (J2000)
17- 23 F7.4 s RAs Right ascension (J2000)
25 A1 --- DE- Declination sign (J2000)
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 37 F6.3 arcsec DEs Declination (J2000)
39- 43 F5.3 mag Bmag B magnitude
45- 49 F5.3 mag Vmag V magnitude
51- 55 F5.3 mag Jmag ? J magnitude
57- 61 F5.3 mag Hmag ? H magnitude
63- 67 F5.3 mag Kmag ? K magnitude
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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 --- Name Star name
11- 16 F6.1 km/s RV Our estimate radial velocity
18- 20 F3.1 km/s e_RV rms uncertainty on RV
22- 27 F6.1 km/s RVl Literature radial velocity
29 I1 --- r_RVl Reference for RVl (1)
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Note (1): References as follows:
1 = Smith, Coleman & Lambert (1993ApJ...417..287S 1993ApJ...417..287S)
2 = Wilson (1953, Cat. III/21)
3 = De Medeiros & Mayor (1999A&AS..139..433D 1999A&AS..139..433D, Cat. J/A+AS/139/433)
4 = Nordstroem et al. (2004A&A...418..989N 2004A&A...418..989N, Cat. V/117)
5 = Massarotti et al. (2008AJ....135..209M 2008AJ....135..209M, Cat. J/AJ/135/209)
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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 --- Name Star name
11- 17 F7.2 K TeffJK ?=- Effective temperature from J-K
19- 25 F7.2 K TeffJH1 ?=- Effective temperature from J-H, [Fe/H]=-0.5
27- 33 F7.2 K TeffVK1 ?=- Effective temperature from V-K, [Fe/H]=-0.5
35- 41 F7.2 K TeffJH2 ?=- Effective temperature from J-H, [Fe/H]=-1.0
43- 49 F7.2 K TeffVK2 ?=- Effective temperature from V-K, [Fe/H]=-1.0
51- 57 F7.2 K TeffBV1 Effective temperature from B-V, [Fe/H]=-0.5
59- 65 F7.2 K TeffBV2 Effective temperature from B-V, [Fe/H]=-1.0
67- 70 I4 K Teffsp Spectroscopic estimate of effective temperature
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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- 8 F8.3 0.1nm lambda Wavelength
10- 13 A4 --- El Element (FeI or FeII)
15- 19 F5.3 eV Elow Lower level energy
21- 26 F6.3 [-] loggf Oscillator strength
28- 32 F5.1 --- Abund1 ?=- HD 4395 abundance
34- 38 F5.1 --- Abund2 ?=- HD 5395 abundance
40- 44 F5.1 --- Abund3 ?=- HD 16458 abundance
46- 51 F6.2 --- Abund4 ?=- HD 48565 abundance
53- 58 F6.2 --- Abund5 ?=- HD 81192 abundance
60- 64 F5.1 --- Abund6 ?=- HD 125079 abundance
66- 71 F6.2 --- Abund7 ?=- HD 188650 abundance
73- 78 F6.2 --- Abund8 ?=- HD 201626 abundance
80- 85 F6.2 --- Abund9 ?=- HD 214714 abundance
87- 92 F6.2 --- Abund10 ?=- HD 216219 abundance
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Star name
11- 14 I4 K Teff Effective temperature
16- 19 F4.2 [cm/s2] logg Gravity surface
21- 24 F4.2 km/s vturb Microturbulent velocity
26- 30 F5.2 [-] [FeI/H] Abundance [FeI/H]
32- 36 F5.2 [-] [FeII/H] Abundance [FeII/H]
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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 A1 --- Type [SC] Type (G1)
2 A1 --- n_Type [*] *: Objects are also included in the Ba
star catalogue of Lu (1991, Cat. V/81)
3- 11 A9 --- Name Star name
13- 17 F5.2 [-] [NaI/Fe] Abundance [NaI/Fe]
19- 22 F4.2 [-] [MgI/Fe] Abundance [MgI/Fe]
24- 28 F5.2 [-] [CaI/Fe] Abundance [CaI/Fe]
30- 34 F5.2 [-] [ScII/Fe] Abundance [ScII/Fe]
36- 40 F5.2 [-] [TiI/Fe] Abundance [TiI/Fe]
42- 45 F4.2 [-] [TiII/Fe] Abundance [TiII/Fe]
47- 51 F5.2 [-] [VI/Fe] ?=- Abundance [VI/Fe]
53- 57 F5.2 [-] [CrI/Fe] Abundance [CrI/Fe]
59- 63 F5.2 [-] [CrII/Fe] ?=- Abundance [CrII/Fe]
65- 69 F5.2 [-] [MnI/Fe] ?=- Abundance [MnI/Fe]
71- 75 F5.2 [-] [CoI/Fe] Abundance [CoI/Fe]
77- 81 F5.2 [-] [NiI/Fe] Abundance [NiI/Fe]
83- 87 F5.2 [-] [ZnI/Fe] Abundance [ZnI/Fe]
89- 92 F4.2 [-] [SrI/Fe] ?=- Abundance [SrI/Fe]
94- 98 F5.2 [-] [YII/Fe] ?=- Abundance [YII/Fe]
100-104 F5.2 [-] [ZrII/Fe] ?=- Abundance [ZrII/Fe]
106-110 F5.2 [-] [BaII/Fe] ?=- Abundance [BaII/Fe]
112-116 F5.2 [-] [LaII/Fe] ?=- Abundance [LaII/Fe]
118-122 F5.2 [-] [CeII/Fe] Abundance [CeII/Fe]
124-127 F4.2 [-] [PrII/Fe] ?=- Abundance [PrII/Fe]
129-132 F4.2 [-] [NdII/Fe] Abundance [NdII/Fe]
134-138 F5.2 [-] [SmII/Fe] ?=- Abundance [SmII/Fe]
140-143 F4.2 [-] [EuII/Fe] ?=- Abundance [EuII/Fe]
145-148 F4.2 [-] [DyII/Fe] ?=- Abundance [DyII/Fe]
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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 --- Name Star name
11- 15 F5.2 [-] [Fe/H] Abundance [Fe/H]
17- 21 F5.2 [-] [ls/Fe] ?=- Abundance [ls/Fe]
23- 26 F4.2 [-] [hs/Fe] ?=- Abundance [hs/Fe]
28- 32 F5.2 [-] [hs/ls] ?=- Abundance [hs/ls]
34 I1 --- Ref Reference for abundances (1)
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Note (1): References as follows:
1 = Our work
2 = Busso et al. (2001ApJ...557..802B 2001ApJ...557..802B)
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Byte-by-byte Description of file: table8.dat table9.dat
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Bytes Format Units Label Explanations
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1- 8 F8.3 0.1nm lambda Wavelength
10- 13 A4 --- El Element (FeI or FeII)
15- 19 F5.3 eV Elow Lower level energy
21- 26 F6.3 [-] loggf Oscillator strength
28- 33 F6.2 0.1nm EW1 ?=- HD 4395 equivalent width
34- 39 F6.2 0.1nm EW2 ?=- HD 5395 equivalent width
41- 46 F6.2 0.1nm EW3 ?=- HD 16458 equivalent width
48- 54 F7.3 0.1nm EW4 ?=- HD 48565 equivalent width
55- 60 F6.2 0.1nm EW5 ?=- HD 81192 equivalent width
62- 67 F6.2 0.1nm EW6 ?=- HD 125079 equivalent width
69- 74 F6.2 0.1nm EW7 ?=- HD 188650 equivalent width
76- 81 F6.2 0.1nm EW8 ?=- HD 201626 equivalent width
83- 88 F6.2 0.1nm EW9 ?=- HD 214714 equivalent width
90- 95 F6.2 0.1nm EW10 ?=- HD 216219 equivalent width
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Byte-by-byte Description of file: table10.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Star name
11- 14 F4.2 mag Vmag V magnitude
16- 19 I4 K Teff ?=- Effective temperature
21- 24 F4.2 [cm/s2] logg ?=- Surface gravity
26- 30 F5.2 [-] [Fe/H] Abundance [Fe/H]
32- 33 I2 --- Ref References (1)
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Note (1): References as follows:
1 = our work
2 = Smith & Lambert (1986ApJ...303..226S 1986ApJ...303..226S)
3 = Smith et al. (1993ApJ...417..287S 1993ApJ...417..287S)
4 = Tomkin & Lambert (1983ApJ...273..722T 1983ApJ...273..722T)
5 = Smith (1984A&A...132..326S 1984A&A...132..326S)
6 = Fernandez-Villacanas, Rego & Cornide (1990AJ.....99.1961F 1990AJ.....99.1961F)
7 = Luck (1991ApJS...75..579L 1991ApJS...75..579L)
8 = Krishnaswamy & Sneden (1985PASP...97..407K 1985PASP...97..407K)
9 = Soubiran et al. (2008A&A...480...91S 2008A&A...480...91S,Cat. J/A+A/480/915)
10 = North et al. (1994A&A...281..775N 1994A&A...281..775N)
11 = McWilliam (1998AJ....115.1640M 1998AJ....115.1640M)
12 = Luck & Bond (1983ApJ...271L..75L 1983ApJ...271L..75L)
13 = Luck & Bond (1985ApJ...292..559L 1985ApJ...292..559L)
14 = Cottrell & Sneden (1986A&A...161..314C 1986A&A...161..314C)
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
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1 A1 --- Type [CS] Type (G1)
3- 11 A9 --- Name Star name
14- 17 F4.2 [-] [SrI/Fe] ?=- Abundance [SrI/Fe]
19- 23 F5.2 [-] [YII/Fe] ?=- Abundance [YII/Fe]
25- 29 F5.2 [-] [ZrII/Fe] ?=- Abundance [ZrII/Fe]
31- 35 F5.2 [-] [BaII/Fe] ?=- Abundance [BaII/Fe]
37- 41 F5.2 [-] [LaII/Fe] ?=- Abundance [LaII/Fe]
43- 47 F5.2 [-] [CeII/Fe] ?=- Abundance [CeII/Fe]
49- 52 F4.2 [-] [PrII/Fe] ?=- Abundance [PrII/Fe]
54- 58 F5.2 [-] [NdII/Fe] ?=- Abundance [NdII/Fe]
60- 64 F5.2 [-] [SmII/Fe] ?=- Abundance [SmII/Fe]
66- 70 F5.2 [-] [EuII/Fe] ?=- Abundance [EuII/Fe]
72- 75 F4.2 [-] [DyII/Fe] ?=- Abundance [DyII/Fe]
77 I1 --- Ref References (1)
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Note (1): References as follows:
1 = our work
2 = Smith et al. (1993ApJ...417..287S 1993ApJ...417..287S)
3 = Luck & Bond (1982ApJ...259..792L 1982ApJ...259..792L)
4 = McWilliam (1990ApJS...74.1075M 1990ApJS...74.1075M)
5 = Smith (1984A&A...132..326S 1984A&A...132..326S)
6 = Allen & Barbuy (2006A&A...454..895A 2006A&A...454..895A, Cat. J/A+A/454/895)
7 = Luck & Bond (1985ApJ...292..559L 1985ApJ...292..559L)
8 = Luck (1991ApJS...75..579L 1991ApJS...75..579L)
9 = Vanture (1992AJ....104.1997V 1992AJ....104.1997V)
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Global notes:
Note (G1): Type as follows:
S = Subgiant-CH stars
C = objects from the CH star catalogue of Bartkevicius (1996BaltA...5..217B 1996BaltA...5..217B)
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History:
From electronic version of the journal
References:
Karinkuzhi et al., Paper II., 2015MNRAS.446.2348K 2015MNRAS.446.2348K
(End) Patricia Vannier [CDS] 26-Jan-2015