J/A+A/564/A60 NGC 4833 Na-O measured with FLAMES (Carretta+, 2014)
The extreme chemistry of multiple stellar populations in the metal-poor globular
cluster NGC 4833.
Carretta E., Bragaglia A., Gratton R.G., D'Orazi V., Lucatello S.,
Momany Y., Sollima A., Bellazzini M., Catanzaro G., Leone F.
<Astron. Astrophys. 564, A60 (2014)>
=2014A&A...564A..60C 2014A&A...564A..60C
ADC_Keywords: Clusters, globular ; Stars, population II ; Abundances
Keywords: stars: abundances - stars: atmospheres - stars: Population II -
globular clusters: general - globular clusters: individual: NGC 4833
Abstract:
Our FLAMES survey of Na-O anticorrelation in globular clusters (GCs)
is extended to NGC 4833, a metal-poor GC with a long blue tail on the
horizontal branch (HB). We present the abundance analysis (Na, O, Mg,
Al, Si, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Ba, La, Nd)for
78 red giants based on UVES and GIRAFFE spectra acquired at the
ESO-VLT. NGC 4833 has [Fe/H]=-2.015±0.004±0.084dex (rms=0.014dex)
from 12 stars observed with UVES; the iron abundance is homogeneous at
better than 6%. The Na-O anticorrelation in NGC 4833 is quite
extended, as expected from the high temperatures reached by stars on
the HB, and NGC 4833 contains a conspicuous fraction of stars with
extreme [O/Na] ratios. Large star-to-star variations are seen also for
Mg, which spans a range of more than 0.5dex in this GC. Depletions in
Mg are correlated to the abundances of O and anti-correlated with Na,
Al, and Si abundances. This pattern suggests the action of nuclear
processing at unusually high temperatures, producing the extreme
chemistry observed in the stellar generations of NGC 4833. This
extreme changes are also seen in giants of the much more massive GCs M
54 and omega Cen, and our conclusion is that NGC 4833 has probably
lost a conpicuous fraction of its original mass due to bulge shocking,
as also indicated by its orbit.
Description:
Results of the abundance analysis are given in several separate
tables, for GIRAFFE and UVES targets.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 69 78 List and relevant information for target stars
table6.dat 57 78 Adopted atmospheric parameters and derived iron
abundances
table7.dat 72 78 Abundances of proton-capture elements
table8.dat 60 78 Abundances of α-elements
table9.dat 109 78 Abundances of Fe-peak elements
table10.dat 45 78 Abundances of n -capture elements with UVES spectra
table11.dat 18 78 Abundances of BaII
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See also:
J/A+A/455/271 : NGC 6441 red giant abundances (Gratton+, 2006)
J/A+A/464/927 : NGC 6752 red giant abundances (Carretta+, 2007)
J/A+A/464/939 : NGC 6218 red giant abundances (Carretta+, 2007)
J/A+A/464/953 : NGC 6441 red giant abundances (Gratton+, 2007)
J/A+A/464/967 : NGC 6388 red giant abundances (Carretta+, 2007)
J/A+A/505/117 : 15 globular clusters red giant abundances (Carretta+, 009)
J/A+A/505/139 : 17 globular clusters red giant abundances (Carretta+, 2009)
J/A+A/533/A69 : Spectroscopy of 124 RGB stars (Carretta+, 2011)
J/A+A/550/A34 : M4 and 47 Tuc red giant abundances (Carretta+, 2013)
J/A+A/520/A95 : M54 and Sgr dSph red giant abundances (Carretta+, 2010)
J/A+A/557/A138 : NGC362: red giant abundances (Carretta+ 2013)
J/A+AS/109/479 : BV Photometry in for NGC 4833 (Samus+, 1995)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Star [22810/38029] Star identification
7- 8 I2 h RAh Right ascension (J2000.0)
10- 11 I2 min RAm Right ascension (J2000.0)
13- 18 F6.3 s RAs Right ascension (J2000.0)
20 A1 --- DE- Declination sign (J2000.0)
21- 22 I2 deg DEd Declination (J2000.0)
24- 25 I2 arcmin DEm Declination (J2000.0)
27- 31 F5.2 arcsec DEs Declination (J2000.0)
33- 38 F6.3 mag Bmag B magnitude
40- 45 F6.3 mag Vmag V magnitude
47- 52 F6.3 mag Kmag K 2MASS magnitude
54- 59 F6.2 km/s RV Heliocentric radial velocity
61- 69 A9 --- Inst Giraffe (HR11 and/or HR13) and/or UVES spectra
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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- 5 I5 --- Star [22810/38029] Star identification
7- 10 I4 K Teff Effective temperature
12- 15 F4.2 [cm/s2] logg Surface gravity
17- 21 F5.2 [Sun] [A/H] Metallicity
23- 26 F4.2 km/s vt Microturbulent velocity
28- 29 I2 --- nFeI Number of FeI lines
31- 36 F6.3 [Sun] [FeI/H] Abundance [FeI/H]
38- 42 F5.3 [Sun] e_[FeI/H] rms uncertainty on [FeI/H]
44 I1 --- nFeII ? Number of FeII lines
46- 51 F6.3 [Sun] [FeII/H] ? Abundance [FeII/H]
53- 57 F5.3 [Sun] e_[FeII/H] ? rms uncertainty on [FeII/H]
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Star [22810/38029] Star identification
7 I1 --- nO ? Number of O lines
9- 13 F5.2 [Sun] [O/Fe] ? Abundance [O/Fe]
15- 18 F4.2 [Sun] e_[O/Fe] ? rms uncertainty on [O/Fe]
20 I1 --- nNa ? Number of Na lines
22- 26 F5.2 [Sun] [Na/Fe] ? Abundance [Na/Fe] (NLTE)
28- 31 F4.2 [Sun] e_[Na/Fe] ? rms uncertainty on [Na/Fe] (NLTE)
33 I1 --- nMg ? Number of Mg lines
35- 39 F5.2 [Sun] [Mg/Fe] ? Abundance [Mg/Fe]
41- 44 F4.2 [Sun] e_[Mg/Fe] ? rms uncertainty on [Mg/Fe]
46 I1 --- nAl ? Number of Al lines
48- 52 F5.2 [Sun] [Al/Fe] ? Abundance [Al/Fe]
54- 57 F4.2 [Sun] e_[Al/Fe] ? rms uncertainty on [Al/Fe]
59 I1 --- l_[O/Fe] [0/1]? 0: [O/Fe] is an upper limit; 1: measure
61 I1 --- l_[Al/Fe] [0/1]? 0: [Al/Fe] is upper limit; 1: measure
63- 67 F5.2 [Sun] [Na/Fe]L ? Abundance [Na/Fe] (LTE)
69- 72 F4.2 [Sun] e_[Na/Fe]L ? rms uncertainty on [Na/Fe] (LTE)
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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- 5 I5 --- Star Identification
7- 8 I2 --- nSi ? Number of Si lines
10- 14 F5.2 [Sun] [Si/Fe] ? Abundance [Si/Fe]
16- 19 F4.2 [Sun] e_[Si/Fe] ? rms uncertainty on [Si/Fe]
21- 22 I2 --- nCa ? Number of Ca lines
24- 28 F5.2 [Sun] [Ca/Fe] ? Abundance [Ca/Fe]
30- 33 F4.2 [Sun] e_[Ca/Fe] ? rms uncertainty on [Ca/Fe]
35 I1 --- nTiI ? Number of TiI lines
37- 41 F5.2 [Sun] [TiI/Fe] ? Abundance [TiI/Fe]
43- 46 F4.2 [Sun] e_[TiI/Fe] ? rms uncertainty on [TiI/Fe]
48- 49 I2 --- nTiII ? Number of TiII lines
51- 55 F5.2 [Sun] [TiII/Fe] ? Abundance [TiII/Fe]
57- 60 F4.2 [Sun] e_[TiII/Fe] ? rms uncertainty on [TiII/Fe]
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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- 5 I5 --- Star Identification
7 I1 --- nScII Number of ScII lines
9- 13 F5.2 [Sun] [ScII/Fe] ? Abundance [ScII/Fe]
15- 18 F4.2 [Sun] e_[ScII/Fe] ? rms uncertainty on [ScII/Fe]
20 I1 --- nV ? Number of V lines
22- 26 F5.2 [Sun] [V/Fe] ? Abundance [V/Fe]
28- 31 F4.2 [Sun] e_[V/Fe] ? rms uncertainty on [V/Fe]
33- 34 I2 --- nCrI ? Number of CrI lines
36- 40 F5.2 [Sun] [CrI/Fe] ? Abundance [CrI/Fe]
42- 45 F4.2 [Sun] e_[CrI/Fe] ? rms uncertainty on [CrI/Fe]
47 I1 --- nCrII ? Number of CrII lines
49- 53 F5.2 [Sun] [CrII/Fe] ? Abundance [CrII/Fe]
55- 58 F4.2 [Sun] e_[CrII/Fe] ? rms uncertainty on [CrII/Fe]
60 I1 --- nMn ? Number of Mn lines
62- 66 F5.2 [Sun] [Mn/Fe] ? Abundance [Mn/Fe]
68- 71 F4.2 [Sun] e_[Mn/Fe] ? rms uncertainty on [Mn/Fe]
73 I1 --- nCo ? Number of Co lines
75- 79 F5.2 [Sun] [Co/Fe] ? Abundance [Co/Fe]
81- 82 I2 --- nNi ? Number of Ni lines
84- 88 F5.2 [Sun] [Ni/Fe] ? Abundance [Ni/Fe]
90- 93 F4.2 [Sun] e_[Ni/Fe] ? rms uncertainty on [Ni/Fe]
95 I1 --- nCu ? Number of Cu lines
97-101 F5.2 [Sun] [Cu/Fe] ? Abundance [Cu/Fe]
103 I1 --- nZnI ? Number of ZnI lines
105-109 F5.2 [Sun] [ZnI/Fe] ? Abundance [ZnI/Fe]
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Byte-by-byte Description of file: table10.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Star [22810/38029] Star identification
7- 8 I2 --- nYII ? Number of YII lines
10- 14 F5.2 [Sun] [YII/Fe] ? Abundance [YII/Fe]
16- 19 F4.2 [Sun] e_[YII/Fe] ? rms uncertainty on [YII/Fe]
21 I1 --- nLaII ? Number of LaII lines
23- 27 F5.2 [Sun] [LaII/Fe] ? Abundance [LaII/Fe]
29- 32 F4.2 [Sun] e_[LaII/Fe] ? rms uncertainty on [LaII/Fe]
34 I1 --- nNdII ? Number of NdII lines
36- 40 F5.2 [Sun] [NdII/Fe] ? Abundance [NdII/Fe]
42- 45 F4.2 [Sun] e_[NdII/Fe] ? rms uncertainty on [NdII/Fe]
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Star [22810/38029] Star identification
7 I1 --- nBaII ? Number of BaII lines
9- 13 F5.2 [Sun] [BaII/Fe] ? Abundance [BaII/Fe]
15- 18 F4.2 [Sun] e_[BaII/Fe] ? rms uncertainty on [BaII/Fe]
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Acknowledgements:
Eugenio Carretta, eugenio.carretta(at)oabo.inaf.it
(End) Patricia Vannier [CDS] 03-Feb-2014