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J/A+A/505/139 Abundances of red giants in 17 globular clusters (Carretta+, 2009)

Na-O anticorrelation and HB. VIII. Proton-capture elements and metallicities in 17 globular clusters from UVES. Carretta E., Bragaglia A., Gratton R.G., Lucatello S. <Astron. Astrophys. 505, 139 (2009)> =2009A&A...505..139C
ADC_Keywords: Clusters, globular ; Stars, giant ; Abundances Keywords: stars: abundances - stars: atmospheres - stars: population II - globular clusters: general Abstract: We present homogeneous abundance determinations for iron and some of the elements involved in the proton-capture reactions (O, Na, Mg, Al, and Si) for 202 red giants in 17 Galactic globular clusters (GCs) from the analysis of high-resolution UVES spectra obtained with the FLAMES facility at the ESO VLT2 telescope. Our programme clusters span almost the whole range of the metallicity distribution of GCs and were selected to sample the widest range of global parameters (horizontal-branch morphology, masses, concentration, etc). In this paper we focus on the discussion of the Na-O and Mg-Al anticorrelations and related issues. Our study finds clear Na and O star-to-star abundance variations, exceeding those expected from the error in the analysis, in all clusters. Variations in Al are present in all but a few GCs. Finally, a spread in abundances of Mg and Si are also present in a few clusters. Mg is slightly less overabundant and Si slightly more overabundant in the most Al-rich stars. Description: Coordinates, magnitudes (B, V, K2mass), heliocentric RVs, atmospheric parameters, abundances of Fe, Na, O, Al, Si, Mg are presented for 17 of our sample of 19 galactic GCs. Observations were done using the 580nm setup for UVES/FLAMES (480-680nm). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 47 69 Log of observations table3.dat 85 202 ID, positions, magnitudes and RVs for stars observed table4.dat 72 202 Atmospheric parameters, FeI, FeII for stars observed table6.dat 92 17 Sensitivity to errors in Teff, logg, Vt, [A/H] table8.dat 79 119 Errors on abundances of FeI, FeII, O, Na, Mg Al, Si for 17 GCs table9.dat 103 202 [O/Fe], [Na/Fe], [Mg/Fe], [Al/Fe], [Si/Fe] for stars in 17 GCs
See also: J/A+A/455/271 : Abundances of red giants in NGC 6441 (Gratton+, 2006) J/A+A/464/927 : Abundances of red giants in NGC 6752 (Carretta+, 2007) J/A+A/464/953 : Abundances of red giants in NGC 6441 (Gratton+, 2007) J/A+A/464/939 : Abundances of red giants in NGC 6218 (Carretta+, 2007) J/A+A/464/967 : Abundances of red giants in NGC 6388 (Carretta+, 2007) J/A+A/505/117 : Abundances of red giants in 15 GC (Carretta+, 2009) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [NGC] 5- 8 I4 --- NGC NGC number 11- 20 A10 "YYYY/MM/DD" Obs.Date Date of observation 23- 34 A12 "h:m:s" Obs.Time UT time of the beginning of the observation 37- 40 I4 s ExpTime Exposure time 43- 47 F5.3 --- Airmass Airmass at the beginning of the observation
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [NGC] 5- 8 I4 --- NGC NGC number 10- 16 I7 --- ID Star ID 19- 20 I2 h RAh Right ascension (J2000.0) 22- 23 I2 min RAm Right ascension (J2000.0) 25- 30 F6.3 s RAs Right ascension (J2000.0) 32 A1 --- DE- Declination sign (J2000.0) 33- 34 I2 deg DEd Declination (J2000.0) 36- 37 I2 arcmin DEm Declination (J2000.0) 39- 43 F5.2 arcsec DEs Declination (J2000.0) 45- 50 F6.3 mag Bmag ?=0.000 Johnson B magnitude 52- 57 F6.3 mag Vmag ?=0.000 Johnson V magnitude 59- 64 F6.3 mag Icmag ?=0.000 Cousins I magnitude 66- 71 F6.3 mag Kmag ?=0.000 2MASS K magnitude 74- 80 F7.2 km/s HRV Heliocentric radial velocity (in grating HR11) 82- 85 F4.2 km/s e_HRV rms uncertainty on HRV
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [NGC] 5- 8 I4 --- NGC NGC number 10- 16 I7 --- ID Star ID 19- 22 I4 K Teff Effective temperature 24- 27 F4.2 [cm/s2] logg Gravity 29- 33 F5.2 [Sun] [A/H] Input metallicity 35- 38 F4.2 km/s vt Microturbulent velocity 40- 42 I3 --- o_[FeI/H] Number of FeI lines 44- 49 F6.3 [Sun] [FeI/H] Metallicity [FeI/H]I 51- 55 F5.3 [Sun] e_[FeI/H] rms uncertainty on [FeI/H] 58- 59 I2 --- o_[FeII/H] Number of FeII lines 61- 66 F6.3 [Sun] [FeII/H] Metallicity [FeII/H] 68- 72 F5.3 [Sun] e_[FeII/H] rms uncertainty on [FeII/H]
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [NGC] 5- 8 I4 --- NGC NGC number 10- 15 F6.3 --- DMg1 Delta[Mg/Fe] for Delta Teff=+50K 17- 22 F6.3 --- DAl1 Delta[Al/Fe] for Delta Teff=+50K 24- 29 F6.3 --- DSi1 Delta[Si/Fe] for Delta Teff=+50K 31- 36 F6.3 --- DMg2 Delta[Mg/Fe] for Delta Vt=+0.1km/s 38- 43 F6.3 --- DAl2 Delta[Al/Fe] for Delta Vt=+0.1km/s 45- 50 F6.3 --- DSi2 Delta[Si/Fe] for Delta Vt=+0.1km/s 52- 57 F6.3 --- DMg3 Delta[Mg/Fe] for Delta logg=+0.2dex 59- 64 F6.3 --- DAl3 Delta[Al/Fe] for Delta logg=+0.2dex 66- 71 F6.3 --- DSi3 Delta[Si/Fe] for Delta logg=+0.2dex 73- 78 F6.3 --- DMg4 Delta[Mg/Fe] for Delta [A/H]=+0.1dex 80- 85 F6.3 --- DAl4 Delta[Al/Fe] for Delta [A/H]=+0.1dex 87- 92 F6.3 --- DSi4 Delta[Si/Fe] for Delta [A/H]=+0.1dex
Byte-by-byte Description of file: table8.dat
Bytes Format Units Label Explanations
1- 8 A8 --- El Element (1) 13- 18 F6.3 [Sun] errT Error in abundance due to Teff 21- 26 F6.3 [Sun] errg Error in abundance due to logg 29- 34 F6.3 [Sun] errA Error in abundance due to [A/H] 37- 42 F6.3 [Sun] errV Error in abundance due to Vt 44- 46 I3 --- Nlines Number of lines 49- 54 F6.3 [Sun] errEW Error in abundance due to EW 57- 62 F6.3 [Sun] err1 Error in abundance due to Teff+Vt+EW 64- 69 F6.3 [Sun] err2 Error in abundance due to all 72- 74 A3 --- --- [NGC] 76- 79 I4 --- NGC NGC designation
Note (1): Elements are: [Fe/H]I, [Fe/H]II, [O/Fe], [Na/Fe], [Mg/Fe], [Al/Fe], and [Si/Fe] for 17 GCs
Byte-by-byte Description of file: table9.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [NGC] 5- 8 I4 --- NGC NGC number 10- 16 I7 --- ID Star ID 20 I1 --- o_[O/Fe] Number of O lines 22 A1 --- l_[O/Fe] Limit flag on [O/Fe] 23- 28 F6.3 [Sun] [O/Fe] ?=99.999 [O/Fe] abundance 30- 34 F5.3 [Sun] e_[O/Fe] ?=9.999 rms uncertainty on [O/Fe] 38 I1 --- o_[Na/Fe] Number of Na lines 40- 45 F6.3 [Sun] [Na/Fe] ?=99.999 [Na/Fe] abundance 47- 51 F5.3 [Sun] e_[Na/Fe] ?=9.999 rms uncertainty on [Na/Fe] 55 I1 --- o_[Mg/Fe] Number of Mg lines 57- 62 F6.3 [Sun] [Mg/Fe] ?=99.999 [Mg/Fe] abundance 64- 68 F5.3 [Sun] e_[Mg/Fe] ?=9.999 rms uncertainty on [Mg/Fe] 72 I1 --- o_[Al/Fe] Number of Al lines 74 A1 --- l_[Al/Fe] Limit flag on [Al/Fe] 75- 80 F6.3 [Sun] [Al/Fe] ?=99.999 [Al/Fe] abundance 82- 86 F5.3 [Sun] e_[Al/Fe] ?=9.999 rms uncertainty on [Al/Fe] 89- 90 I2 --- o_[Si/Fe] Number of Si lines 92- 97 F6.3 [Sun] [Si/Fe] ?=99.999 [Si/Fe] abundance 99-103 F5.3 [Sun] e_[Si/Fe] ?=9.999 rms uncertainty on [Si/Fe]
Acknowledgements: Eugenio Carretta, eugenio.carretta(at)oabo.inaf.it History: * 17-Sep-2009: Original version * 06-Jul-2011: a typo in the NGC number (3202 instead of the correct number 3201) fixed in tables 3, 4 and 9. References: Carretta et al., Paper I NGC 2808 2006A&A...450..523C Carretta et al., Paper II NGC 6752 2007A&A...464..927C, Cat. J/A+A/464/927 Gratton et al., Paper III NGC 6441 2006A&A...455..271G, Cat. J/A+A/455/271 Carretta et al., Paper IV NGC 6218 2007A&A...464..939C, Cat. J/A+A/464/939 Gratton et al., Paper V NGC 6441 2007A&A...464..953G, Cat. J/A+A/464/953 Carretta et al., Paper VI NGC 6388 2007A&A...464..967C, Cat. J/A+A/464/967 Carretta et al., Paper VII 15 GC 2009A&A...505..117C, Cat. J/A+A/505/117
(End) E. Carretta [INAF-Oss. Astr. Bologna, Italy], P. Vannier [CDS] 17-Sep-2009
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