Access to Astronomical Catalogues

← Click to display the menu
J/A+A/604/A128      S abundances for 1301 stars from GES       (Duffau+, 2017)

The Gaia-ESO Survey: Galactic evolution of sulphur and zinc. Duffau S., Caffau E., Sbordone L., Bonifacio P., Andrievsky S., Korotin S., Babusiaux C., Salvadori S., Monaco L., Francois P., Skuladottir A., Bragaglia A., Donati P., Spina L., Gallagher A.J., Ludwig H.-G., Christlieb N., Hansen C.J., Mott A., Steffen M., Zaggia S., Blanco-Cuaresma S., Calura F., Friel E., Jimenez-Esteban F.M., Koch A., Magrini L., Pancino E., Tang B., Tautvaisiene G., Vallenari A., Hawkins K., Gilmore G., Randich S., Feltzing S., Bensby T., Flaccomio E., Smiljanic R., Bayo A., Carraro G., Casey A. R., Costado M. T., Damiani F., Franciosini E., Hourihane A., Jofre P., Lardo C., Lewis J., Morbidelli L., Sousa S.G., Worley C.C. <Astron. Astrophys. 604, A128 (2017)> =2017A&A...604A.128D (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Stars, dwarfs ; Stars, giant ; Abundances ; Spectroscopy Keywords: Galaxy: abundances - Galaxy: evolution - Galaxy: disk - stars: abundances - open clusters and associations: general - globular clusters: general Abstract: Due to their volatile nature, when sulphur and zinc are observed in external galaxies, their determined abundances represent the gas-phase abundances in the interstellar medium. This implies that they can be used as tracers of the chemical enrichment of matter in the Universe at high redshift. Comparable observations in stars are more difficult and, until recently, plagued by small number statistics. We wish to exploit the Gaia ESO Survey (GES) data to study the behaviour of sulphur and zinc abundances of a large number of Galactic stars, in a homogeneous way. By using the UVES spectra of the GES sample, we are able to assemble a sample of 1301 Galactic stars, including stars in open and globular clusters in which both sulphur and zinc were measured. We confirm the results from the literature that sulphur behaves as an alpha-element. We find a large scatter in [Zn/Fe] ratios among giant stars around solar metallicity. The lower ratios are observed in giant stars at Galactocentric distances less than 7.5kpc. No such effect is observed among dwarf stars, since they do not extend to that radius. Given the sample selection, giants and dwarfs are observed at different Galactic locations, and it is plausible, and compatible with simple calculations, that Zn-poor giants trace a younger population more polluted by SN Ia yields. It is necessary to extend observations in order to observe both giants and dwarfs at the same Galactic location. Further theoretical work on the evolution of zinc is also necessary. Description: GES internal star identifier (CNAME), Sulphur abundances and NLTE corrections to the Sulphur abundances for 1301 stars. Sulphur abundances are expressed in the customary logarithmic form: A(S)=log_10(N(S)/N(H))+12. The abundances delivered are the LTE ones. NLTEabundances can be determined by directly summing the NLTE correction delivered: A(S)_NLTE = A(S) + NLTE_C. So that a negative NLTE correction indicates that the NLTE abundance is lower than the LTE one. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file ges_s_du.dat 37 1301 Sulphur abundances
See also: J/A+A/572/A33 : Abundances from Gaia-ESO Survey (Mikolaitis+, 2014) J/A+A/589/A115 : Na and Al abundances of 1303 stars (Smiljanic+, 2016) J/A+A/603/A2 : GES abundances radial distribution (Magrini+, 2017) J/MNRAS/441/3127 : FeI oscillator strengths for Gaia-ESO (Ruffoni+, 2014) Byte-by-byte Description of file: ges_s_du.dat
Bytes Format Units Label Explanations
1- 16 A16 --- Cname GES star unique identifier (HHMMSSss+DDMMSSs) 19- 25 F7.4 --- A(S) Sulphur abundance (LTE) 28- 37 E10.3 --- NLTEc NLTE corrections
Acknowledgements: Sonia Duffau, sonia.duffau(at)gmail.com
(End) Sonia Duffau [Universidad Andres Bello] Patricia Vannier [CDS] 03-Jul-2017
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

catalogue service

© UDS/CNRS

Contact