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J/A+A/615/A165   Equivalent widths of 13 red giants in IC 4756 (Bagdonas+, 2018)

Chemical composition of giant stars in the open cluster IC 4756. Bagdonas V., Drazdauskas A., Tautvaisiene G., Smiljanic R., Chorniy Y. <Astron. Astrophys. 615, A165 (2018)> =2018A&A...615A.165B (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Stars, horizontal branch ; Abundances ; Equivalent widths Keywords: stars: abundances - open clusters and associations: individual: IC 4756 - stars: horizontal-branch - stars: evolution - Abstract: Homogeneous investigations of red giant stars in open clusters contribute to studies of internal evolutionary mixing processes inside stars, which are reflected in abundances of mixing-sensitive chemical elements like carbon, nitrogen, and sodium, while α- and neutron-capture element abundances are useful in tracing the Galactic chemical evolution. The main aim of this study is a comprehensive chemical analysis of red giant stars in the open cluster IC 4756, including determinations of 12C/13C and C/N abundance ratios, and comparisons of the results with theoretical models of stellar and Galactic chemical evolution. We used a classical differential model atmosphere method to analyse high-resolution spectra obtained with the FEROS spectrograph on the 2.2m MPG/ESO Telescope. The carbon, nitrogen, and oxygen abundances, 12C/13C ratios, and neutron-capture element abundances were determined using synthetic spectra, and the main atmospheric parameters and abundances of other chemical elements were determined from equivalent widths of spectral lines. Description: Equivalent widths (EWs) of spectral lines in stars of IC 4756 are presented. The table provides the data for stars 12, 14, 28, 38, 42, 44, 52, 69, 81, 101, 109, 125, 164 (among which 14, 28, 44, and 52 are doubtful members). The identifications of stars were adopted from Kopff (1943). For each star, the EWs for Na, Mg, Al, Si, Ca, Sc, Ti, Cr, and Ni are given. For the measurement of EWs, a SPLAT-VO program package (Skoda et al., 2014A&C.....7..108S) was used. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 57 13 A list of analysed stars and their parameters table2.dat 64 143 The equivalent widths for individual lines in stars of IC 4756
See also: J/AJ/109/1903 : Membership to cluster IC 4756 (Missana+ 1995) J/AJ/134/1216 : Abundances of NGC 7142, 6939 and IC 4756 stars (Jacobson+ 2007) J/A+A/515/A28 : Abundances of dwarfs and giants in 2 open clusters (Pace+ 2010) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- ID Star identification number, IC 4665 NNN in Simbad (1) 5- 12 F8.4 deg RAdeg Right ascension (J2000) 14- 20 F7.4 deg DEdeg Declination (J2000) 22- 25 F4.2 mag Vmag V magnitude (2) 27- 30 F4.2 mag B-V B-V colour index (2) 32- 41 A10 "date" Obs.Date Observation date 43- 45 I3 s ExpTime Exposure time 47- 52 F6.2 km/s RV Radial velocity (3) 54 A1 --- l_S/N [~] Limit flag on S/N 55- 57 I3 --- S/N Signal-to-noise ration at ∼64000Å
Note (1): The IDs are adopted from Kopff (1943AN....274...69K). Note (2): The UBV photometry are taken from Alcaino (1965LowOB...6..167A). Note (3): The radial velocities as determined in this work.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 A4 --- El Element 6- 12 F7.2 0.1nm lambda Wavelength 14- 16 I3 0.1pm EW12 ? Equivalent widths for star 12 18- 20 I3 0.1pm EW14 ? Equivalent widths for star 14 22- 24 I3 0.1pm EW28 ? Equivalent widths for star 28 26- 28 I3 0.1pm EW38 ? Equivalent widths for star 38 30- 32 I3 0.1pm EW42 ? Equivalent widths for star 42 34- 36 I3 0.1pm EW44 ? Equivalent widths for star 44 38- 40 I3 0.1pm EW52 ? Equivalent widths for star 52 42- 44 I3 0.1pm EW69 ? Equivalent widths for star 69 46- 48 I3 0.1pm EW81 ? Equivalent widths for star 81 50- 52 I3 0.1pm EW101 ? Equivalent widths for star 101 54- 56 I3 0.1pm EW109 ? Equivalent widths for star 109 58- 60 I3 0.1pm EW125 ? Equivalent widths for star 125 62- 64 I3 0.1pm EW164 ? Equivalent widths for star 164
Acknowledgements: Vilius Bagdonas, vilius.bagdonas(at)
(End) Vilius Bagdonas [Vilnius University], Patricia Vannier [CDS] 16-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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