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J/A+A/539/A157         Li and Na in globular cluster M4      (Monaco+, 2012)

Lithium and sodium in the globular cluster M 4. Detection of a Li-rich dwarf star: preservation or pollution? Monaco L., Villanova S., Bonifacio P., Caffau E., Geisler D., Marconi G., Momany Y., Ludwig H.-G. <Astron. Astrophys., 539, A157 (2012)> =2012A&A...539A.157M
ADC_Keywords: Clusters, globular; Stars, dwarfs ; Abundances Keywords: nuclear reactions, nucleosynthesis, abundances - stars: abundances - stars: Population II - galaxies: abundances - globular clusters: individual: M4 - cosmology: observations Abstract: The abundance inhomogeneities of light elements observed in globular clusters (GCs), and notably the ubiquitous Na-O anti-correlation, are generally interpreted as evidence that GCs comprise several generations of stars. There is an on-going debate as to the nature of the stars, which produce the inhomogeneous elements, and investigating the behavior of several elements is a way to shed new light on this problem. We aim at investigating the Li and Na content of the GC M4, that is known to have a well defined Na-O anti-correlation. We obtained moderate resolution (R=17000-18700) spectra for 91 main sequence (MS)/sub-giant branch stars of M4 with the Giraffe spectrograph at the FLAMES/VLT ESO facility. Using model atmospheres analysis we measured lithium and sodium abundances. Description: We observed stars along the M4 MS and SGB using the FLAMES/GIRAFFE spectrograph at ESO Paranal. Observations were conducted in service mode between April and July 2010 using the HR12 and HR15N settings. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 68 91 Basic data for MS/SGB stars studied in this paper
See also: J/ApJ/443/124 : Radial Velocities of Stars in M4 (Peterson+ 1995) J/PAZh/22/847 : Identification and coordinates in M4 (Shokin+, 1996) J/AJ/114/189 : M4 CCD photometry (Alcaino+, 1997) J/ApJS/120/265 : HST photometry of M4 (Ibata+, 1999) J/AJ/124/1486 : M4 UBV color-magnitude diagrams (Mochejska+, 2002) J/AJ/127/2771 : HST proper-motions of M4 main-sequence stars (Richer+, 2004) J/ApJ/689/1031 : Heavy element abundances in giant stars (Yong+, 2008) J/A+A/490/625 : Abundances of NGC 6121 red giants (Marino+, 2008) J/MNRAS/412/81 : Lithium abundance in M4 red giants (Mucciarelli+, 2011) Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 5 I5 --- Seq Sequential number 7- 8 I2 h RAh Right ascension (J2000) 10- 11 I2 min RAm Right ascension (J2000) 13- 17 F5.2 s RAs Right ascension (J2000) 19 A1 --- DE- Declination sign (J2000) 20- 21 I2 deg DEd Declination (J2000) 23- 24 I2 arcmin DEm Declination (J2000) 26- 30 F5.2 arcsec DEs Declination (J2000) 32- 35 I4 K Teff Effective temperature 37- 40 F4.2 [cm/s2] logg Surface gravity 42- 45 F4.2 km/s xi Turbulent velocity ξ 47- 50 F4.2 [-] A(Fe) [6.12/6.36] Fe abundance 52- 55 F4.2 [-] A(Na) [4.94/5.52] Na abundance 57- 60 F4.2 [-] A(Li) [0.86/2.87] Li abundance 62- 64 I3 0.1pm EW(Li) [8/114] Li equivalent width 66- 68 I3 --- S/N Spectral signal-to-noise at the lithium line
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 29-May-2012
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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