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 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:
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FileName Lrecl Records Explanations
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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
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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
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: table3.dat
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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
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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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]
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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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
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Note (1): Elements are:
[Fe/H]I, [Fe/H]II, [O/Fe], [Na/Fe], [Mg/Fe], [Al/Fe], and [Si/Fe] for
17 GCs
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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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]
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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 2006A&A...450..523C
Carretta et al., Paper II NGC 6752 2007A&A...464..927C 2007A&A...464..927C, Cat. J/A+A/464/927
Gratton et al., Paper III NGC 6441 2006A&A...455..271G 2006A&A...455..271G, Cat. J/A+A/455/271
Carretta et al., Paper IV NGC 6218 2007A&A...464..939C 2007A&A...464..939C, Cat. J/A+A/464/939
Gratton et al., Paper V NGC 6441 2007A&A...464..953G 2007A&A...464..953G, Cat. J/A+A/464/953
Carretta et al., Paper VI NGC 6388 2007A&A...464..967C 2007A&A...464..967C, Cat. J/A+A/464/967
Carretta et al., Paper VII 15 GC 2009A&A...505..117C 2009A&A...505..117C, Cat. J/A+A/505/117
(End) E. Carretta [INAF-Oss. Astr. Bologna, Italy], P. Vannier [CDS] 17-Sep-2009