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ReadMe
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J/A+A/511/A56 Abundances of five open clusters (Pancino+, 2010)
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Chemical abundance analysis of the open clusters Cr 110, NGC 2420, NGC 7789,
and M 67 (NGC 2682).
Pancino E., Carrera R., Rossetti, E., Gallart C.
<Astron. Astrophys. 511, A56 (2010)>
=2010A&A...511A..56P
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ADC_Keywords: Clusters, open ; Stars, giant ; Equivalent widths ; Spectroscopy
Keywords: stars: abundances - Galaxy: disk -
open clusters and associations: general
Abstract:
The present number of Galactic open clusters that have high resolution
abundance determinations, not only of [Fe/H], but also of other key
elements, is largely insufficient to enable a clear modeling of the
Galactic disk chemical evolution. To increase the number of Galactic
open clusters with high quality measurements, we obtained high
resolution (R~30000), high quality (S/N~50-100 per pixel), echelle
spectra with the fiber spectrograph FOCES, at Calar Alto, Spain, for
three red clump stars in each of five Open Clusters. We used the
classical equivalent width analysis method to obtain accurate
abundances of sixteen elements: Al, Ba, Ca, Co, Cr, Fe, La, Mg, Na,
Nd, Ni, Sc, Si, Ti, V, and Y. We also derived the oxygen abundance
using spectral synthesis of the 6300{AA} forbidden line.
Description:
Atomic data and equivalent widths for 15 red clump giants in 5 open
clusters: Cr 110, NGC 2099, NGC 2420, M 67, NGC 7789.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 103 15 Observing logs and programme stars information
table5.dat 56 5265 Atomic data and equivalent widths
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See also:
J/A+A/455/271 : Abundances of red giants in NGC 6441 (Gratton+, 2006)
J/A+A/464/953 : Abundances of red giants in NGC 6441 (Gratton+, 2007)
J/A+A/505/117 : Abund. of red giants in 15 globular clusters (Carretta+, 2009)
Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Cluster Cluster name
9- 12 I4 --- Star
14- 20 F7.2 0.1nm Wave wave
? Wavelength in Angstroms
22- 23 A2 --- El a
24 I1 --- ion ?=0
- Ionization stage (1 for neutral element)
26- 30 F5.2 eV chiEx Excitation potential
32- 37 F6.2 --- loggf log10 of the gf value - logarithm base
10 of stat. weight times oscillator strength
39- 43 F5.1 0.1pm EW ?=-9.9 Equivalent width (in mA)
46- 49 F4.1 0.1pm e_EW ?=-9.9 rms uncertainty on EW
51- 56 F6.3 --- Q ?=-9.999 DAOSPEC quality parameter Q
(large values are bad)
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Acknowledgements:
Elena Pancino, elena.pancino(at)oabo.inaf.it
================================================================================
(End) Elena Pancino [INAF-OABo, Italy], Patricia Vannier [CDS] 23-Nov-2009