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J/MNRAS/463/580     Abundances of red giants in NGC6940      (Bocek+, 2016)

The chemical compositions and evolutionary status of red giants in the open cluster NGC 6940. Bocek Topcu G., Afsar M., Sneden C. <Mon. Not. R. Astron. Soc., 463, 580-597 (2016)> =2016MNRAS.463..580B (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Stars, giant ; Equivalent widths Keywords: stars: abundances - stars: atmospheres - open clusters and associations: individual: NGC 6940 - open clusters and associations: individual: Hyades Abstract: We present the high-resolution (R~=60000), high signal-to-noise ratio (S/N~=120) spectroscopic analysis of 12 red giant members of the Galactic open cluster NGC 6940. We applied Yonsei-Yale isochrones to the colour-magnitude diagram, which suggested an age of 1.1Gyr for the cluster with a turn-off mass of 2 M. Atmospheric parameters (Teff, logg, [Fe/H], and ξt) were determined via equivalent widths of FeI, FeII, TiI, and TiII lines. Calculated mean metallicity of the cluster is <[Fe/H]≥0.04±0.02. We derived abundances of α (Mg, Si, Ca), Fe-group (Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn), and n-capture (Y, La, Nd, Eu) elements to be about solar. Light odd-Z elements Na and Al are slightly enhanced in MMU 108 and MMU 152 by ∼0.34 and ∼0.16dex, respectively. Abundances of light elements Li, C, N, O, and 12C/13C ratios were derived from spectrum syntheses of the LiI resonance doublet at 6707Å, [OI] line at 6300Å, C2 Swan bandheads at 5164 and 5635Å, and strong 12,13CN system lines in the 7995-8040Å region. Most carbon isotopic ratios are similar to those found in other solar-metallicity giants, but MMU 152 has an unusual value of 12C/13C=6. Evaluation of the LiCNO abundances and 12C/13C ratios along with the present theoretical models suggests that all the red giants in our sample are core-helium-burning clump stars. Description: This study is the second in this series of papers on the chemical compositions RGs of OCs. Here we report the first detailed chemical abundance analysis of NGC 6940, giving results for 12 RG members. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 84 12 Basic parameters of observed NGC 6940 RGs table4.dat 32 218 Linelist of species table5.dat 85 160 Equivalent width measurements of the NGC 6940 RG members
See also: J/MNRAS/446/3562 : Abundances of red giants in NGC752 (Bocek Topcu+, 2015) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Star Star name (MMUNNN) 7- 9 A3 --- n_Star Note on Star (1) 11- 12 I2 h RAh Right ascension (J2000) 14- 15 I2 min RAm Right ascension (J2000) 17- 22 F6.3 s RAs Right ascension (J2000) 24 A1 --- DE- Declination sign (J2000) 25- 26 I2 deg DEd Declination (J2000) 28- 29 I2 arcmin DEm Declination (J2000) 31- 35 F5.2 arcsec DEs Declination (J2000) 37- 41 F5.2 mag Bmag B magnitude (Larsson-Leander, 1960StoAn..20i...1L) 43- 47 F5.2 mag Vmag V magnitude (Larsson-Leander, 1960StoAn..20i...1L) 49- 52 F4.2 mag Kmag K magnitude (Cutri et al., 2003, Cat. II/246/) 54- 57 F4.2 mag VMAG0 Deredenned absolute V magnitude 59- 62 F4.2 mag B-V B-V colour index 64- 67 F4.2 mag (B-V)0 Deredenned B-V colour index 69- 72 F4.2 mag (V-K)0 Deredenned V-K colour index 74- 78 F5.2 mas/yr pmRA Proper motion along RA (pmRA*cosDE) 80- 84 F5.1 mas/yr pmDE Proper motion along DE
Note (1): Note as follows: c = Coordinates and proper motions from Hog et al. (1998A&A...335L..65H, Cat. I/250) d = Coordinates and proper motions from Hog et al. (2000A&A...355L..27H, Cat. I/259)
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Species Species identification (1) 7- 13 F7.2 0.1nm lambda Wavelength in Angstroms 16- 20 F5.3 eV LEP ? Lower Excitation potential of the transition 21- 25 F5.2 [-] loggf ? Log of the oscillator strength 27- 29 A3 --- EW/Syn Method of analysis. Equivalent width measurement or spectrum synthesis. 31- 32 A2 --- Ref Reference for log(gf) (2)
Note (1): The integer component of the species ID indicates the atomic number, and the decimal component indicates the ionization state (I=neutral, II=singly ionized). Note (2): References as follows: 1 = KRUCZ 2 = Masseron et al. (2014A&A...571A..47) 3 = Brooke et al. (2014ApJS..210...23B) 4 = Sneden et al. (2014ApJS..214...26S) 5 = Allende Prieto et al. (2001ApJ...556L..63A) 6 = NIST 7 = Lobel A. (2011CaJPh..89..395L) 8 = VALD 9 = Ishigaki et al. (2012ApJ...753...64I) 10 = For & Sneden (2010AJ....140.1694F) 11 = Ivans, Inese et al. (2006ApJ...645..613I) 12 = Reddy et al. (2012MNRAS.419.1350R) 13 = Carrera & Pancino (2011A&A...535A..30C) 14 = Hamdani et al. (2000A&A...360..509H) 15 = Smith & Raggett (1981JPhB...14.4015S) 16 = Marsden et al. (1988JOSAB...5..606) 17 = Lawler et al.(2013ApJS..205...11L) 18 = Wood et al. (2013ApJS..208...27W) 19 = Lawler et al. (2014ApJS..215...20L) 20 = Sobeck et al. (2007ApJ...667.1267S) 21 = Den Hartog et al. (2011ApJS..194...35D) 22 = Ruffoni et al. (2014MNRAS.441.3127R) 23 = Ramirez & Allende Prieto, C. (2011ApJ...743..135R) 24 = O'Brian et al. (1991JOSAB...8.1185O) 25 = Lambert et al. (1996ApJS..103..183L) 26 = Den Hartog et al. (2014ApJS..215...23D) 27 = Melendez & Barbuy (2009A&A...497..611) 28 = Lawler et al. (2015ApJS..220...13L) 29 = Wood et al. (2014ApJS..211...20W) 30 = Jacobson et al. (2007AJ....134.1216J) 31 = Reddy et al. (2015MNRAS.450.4301R) 32 = Lawler et al. (2001ApJ...556..452L) 33 = Den Hartog et al. (2003ApJS..148..543D) 34 = Den Hartog et al. (2002ApJS..141..255D)
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Species Species identification (1) 7- 13 F7.2 0.1nm lambda Wavelength 15- 19 F5.1 0.1pm MMU28 ? Equivalent width in milli-Angstroms (2) 21- 25 F5.1 0.1pm MMU30 ? Equivalent width in milli-Angstroms (2) 27- 31 F5.1 0.1pm MMU60 ? Equivalent width in milli-Angstroms (2) 33- 37 F5.1 0.1pm MMU69 ? Equivalent width in milli-Angstroms (2) 39- 43 F5.1 0.1pm MMU87 ? Equivalent width in milli-Angstroms (2) 45- 49 F5.1 0.1pm MMU101 ? Equivalent width in milli-Angstroms (2) 51- 55 F5.1 0.1pm MMU105 ? Equivalent width in milli-Angstroms (2) 57- 61 F5.1 0.1pm MMU108 ? Equivalent width in milli-Angstroms (2) 63- 67 F5.1 0.1pm MMU132 ? Equivalent width in milli-Angstroms (2) 69- 73 F5.1 0.1pm MMU138 ? Equivalent width in milli-Angstroms (2) 75- 79 F5.1 0.1pm MMU139 ? Equivalent width in milli-Angstroms (2) 81- 85 F5.1 0.1pm MMU152 ? Equivalent width in milli-Angstroms (2)
Note (1): The integer component of the species ID indicates the atomic number, and the decimal component indicates the ionization state (I=neutral, II=singly ionized). Note (2): The EW given for the synthesized line.
History: From electronic version of the journal References: Bocek Topcu et al., Paper I 2015MNRAS.446.3562B, Cat. J/MNRAS/446/3562
(End) Patricia Vannier [CDS] 30-Apr-2018
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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