J/A+A/677/A73 Chemistry of globular cluster NGC6388 (Carretta+, 2023)
Chemistry of multiple stellar populations in the mono-metallic, in situ,
bulge globular cluster NGC 6388.
Carretta E., Bragaglia A.
<Astron. Astrophys. 677, A73 (2023)>
=2023A&A...677A..73C 2023A&A...677A..73C (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, globular ; Stars, giant ; Abundances ; Ultraviolet
Keywords: stars: abundances - stars: atmospheres - stars: Population II -
globular clusters: general -
globular clusters: individual: NGC 6388
Abstract:
We present the homogeneous abundance analysis for a combined sample of
185 giants in the bulge globular cluster (GC) NGC 6388. Our results
are used to describe the multiple stellar populations, and differences
or analogies with bulge field stars. Proton-capture elements indicate
that a single class of first generation polluters is sufficient to
reproduce both the extreme and intermediate parts of the
anti-correlations among light elements O, Na, Mg, and Al, at odds with
our previous results, based on a much smaller sample. The abundance
pattern of other species closely tracks the trends observed in bulge
field stars. The neutron-capture elements are generally uniform
([Zr/Fe] is an exception). We do not find enhancement in n-capture
elements for stars whose photometric properties would classify NGC
6388 as a type II GC. Together with the homogeneity in [Fe/H], this
indicates we need to understand better the criteria to separate
classes of GCs, coupling photometry and spectroscopy. We present
abundances of O, Na, Mg, Al, Si, Ca, Ti, Sc, V, Cr, Mn, Fe, Co, Ni,
Zn, Y, Zr, Ba, La, Ce, Nd, and Eu from UVES spectra. For 12 species we
also obtain abundances in a large number of giants (up to 150) from
GIRAFFE spectra.
Description:
We present abundances of O, Na, Mg, Al, Si, Ca, Ti, Sc, V, Cr, Mn, Fe,
Co, Ni, Zn, Y, Zr, Ba, La, Ce, Nd, and Eu from UVES spectra. For 12
species we also obtain abundances in a large number of giants (up to
150) from GIRAFFE spectra.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 74 162 Light elements (O, Na, Mg, Al) abundance
tablea2.dat 68 162 alpha elements (Si, Ca, Ti I, Ti II) abundance
tablea3.dat 108 162 Iron peak (Sc, V, Cr, Mn, Co, Ni, Zn) abundance
tablea5.dat 37 162 n-capture measured in UVES and GIRAFFE (Zr, Ba)
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See also:
J/A+A/659/A122 : Metallicity of NGC 6388 (Carretta+, 2022)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Star Unique name for star
9 I1 --- o_O Number of O lines
11- 16 F6.3 [-] [O/Fe] ? Abundance ratio [O/Fe]
19- 23 F5.3 [-] e_[O/Fe] ? rms of [O/Fe]
25 I1 --- o_Na Number of Na lines
27- 32 F6.3 [-] [Na/Fe] ? Abundance ratio [Na/Fe]
34- 38 F5.3 [-] e_[Na/Fe] ? rms of [Na/Fe]
41 I1 --- l_[O/Fe] [0/1] Upper limit flag for [O/Fe] (1)
43 I1 --- o_Mg Number of Mg lines
45- 49 F5.3 [-] [Mg/Fe] ? Abundance ratio [Mg/Fe]
51- 55 F5.3 [-] e_[Mg/Fe] ? rms of [Mg/Fe]
57 I1 --- o_Al Number of Al lines
59- 64 F6.3 [-] [Al/Fe] ? Abundance ratio [Al/Fe]
66- 70 F5.3 [-] e_[Al/Fe] ? rms of [Al/Fe]
72- 74 A3 --- Phase Evolutionary phase (2)
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Note (1): Upper limit flag as follows:
1 = detection
0 = upper limit
Note (1): Evolutionary phase as follows:
RGB = red giant branch
AGB = asymptotic giant branch
RHB = red horizontal branch
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Star Unique name for star
9 I1 --- o_Si ? Number of Si lines
11- 15 F5.3 [-] [Si/Fe] ? Abundance ratio [Si/Fe]
17- 21 F5.3 [-] e_[Si/Fe] ? rms of [Si/Fe]
23- 24 I2 --- o_Ca Number of Ca lines
26- 31 F6.3 [-] [Ca/Fe] Abundance ratio [Ca/Fe]
33- 37 F5.3 [-] e_[Ca/Fe] rms of [Ca/Fe]
39- 40 I2 --- o_TiI Number of TiI lines
42- 47 F6.3 [-] [TiI/Fe] Abundance ratio [TiI/Fe]
49- 53 F5.3 [-] e_[TiI/Fe] rms of [TiI/Fe]
55- 56 I2 --- o_TiII ? Number of TiII lines
58- 62 F5.3 [-] [TiII/Fe] ? Abundance ratio [TiII/Fe]
64- 68 F5.3 [-] e_[TiII/Fe] ? rms of [TiII/Fe]
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Star Unique name for star
9 I1 --- o_ScII Number of ScII lines
11- 16 F6.3 [-] [ScII/Fe] Abundance ratio [ScII/Fe]
18- 22 F5.3 [-] e_[ScII/Fe] rms of [ScII/Fe]
24- 25 I2 --- o_V ? Number of V lines
27- 31 F5.3 [-] [V/Fe] ? Abundance ratio [V/Fe]
33- 37 F5.3 [-] e_[V/Fe] ? rms of [V/Fe]
39- 40 I2 --- o_CrI ? Number of CrI lines
42- 47 F6.3 [-] [CrI/Fe] ? Abundance ratio [CrI/Fe]
49- 53 F5.3 [-] e_[CrI/Fe] ? rms of [CrI/Fe]
55 I1 --- o_Mn ? Number of Mn lines
57- 62 F6.3 [-] [Mn/Fe] ? Abundance ratio [Mn/Fe]
64- 68 F5.3 [-] e_[Mn/Fe] ? rms of [Mn/Fe]
70 I1 --- o_Co ? Number of Co lines
72- 77 F6.3 [-] [Co/Fe] ? Abundance ratio [Co/Fe]
79- 83 F5.3 [-] e_[Co/Fe] ? rms of [Co/Fe]
85- 86 I2 --- o_Ni ? Number of Ni lines
88- 93 F6.3 [-] [Ni/Fe] ? Abundance ratio [Ni/Fe]
95- 99 F5.3 [-] e_[Ni/Fe] ? rms of [Ni/Fe]
101 I1 --- o_Zn ? Number of Zn lines
103-108 F6.3 [-] [Zn/Fe] ? Abundance ratio [Zn/Fe]
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Byte-by-byte Description of file: tablea5.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Star Unique name for star
9 I1 --- o_ZrI ? Number of ZrI lines
11- 16 F6.3 [-] [ZrI/Fe] ? Abundance ratio [ZrI/Fe]
18- 22 F5.3 [-] e_[ZrI/Fe] ? rms of [ZrI/Fe]
24 I1 --- o_BaII ? Number of BaII lines
26- 31 F6.3 [-] [BaII/Fe] ? Abundance ratio [BaII/Fe]
33- 37 F5.3 [-] e_[BaII/Fe] ? rms of [BaII/Fe]
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Acknowledgements:
Eugenio Carretta, eugenio.carretta(at)inaf.it
(End) Eugenio Carretta [INAF-OAS Bologna], Patricia Vannier [CDS] 23-Jun-2023