J/A+A/486/941 Abundances in M71 (NGC 6838) (Alves-Brito+, 2008)
Abundance variations in the globular cluster M71 (NGC 6838).
Alves-Brito A., Schiavon R.P., Castilho B., Barbuy B.
<Astron. Astrophys., 486, 941-950 (2008)>
=2008A&A...486..941A 2008A&A...486..941A
ADC_Keywords: Clusters, globular ; Abundances, peculiar
Keywords: globular cluster: individual: M71 - stars: abundances -
Galaxy: abundances
Abstract:
Abundance variations in moderately metal-rich globular clusters can
give clues about the formation and chemical enrichment of globular
clusters.
CN, CH, Na, Mg and Al indices in spectra of 89 stars of the template
metal-rich globular cluster M71 are measured and implications on
internal mixing are discussed.
Description:
Imaging and spectroscopy of M71 stars were obtained with the Gemini
Multi-Object Spectrograph (GMOS; see, for example, Hook et al.
(2004PASP..116..425H 2004PASP..116..425H) for more details) in the MOS mode on the 8m
Frederick C. Gillett Telescope (Gemini-North). All observations were
part of GEMINI Program GN-2002B-Q-42.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 77 145 Program stars : star identification
(1, as given in the observation)
table3.dat 90 145 Selected spectral indices and uncertainties
table4.dat 90 145 Selected spectral indices and uncertainties
table5.dat 73 145 Selected spectral indices and uncertainties
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq Star Identification
6 A1 --- n_Seq [*] * for stars with Pmemb=80%
8- 13 A6 --- Name Other name (1)
15- 22 F8.4 deg RAdeg Right ascension in decimal degrees (J2000)
24- 32 F9.5 deg DEdeg Declination in decimal degrees (J2000)
34- 40 F7.2 km/s HRV ?=- Heliocentric radial velocity
42- 43 I2 % Pmb ?=- Membership probabilities
45- 49 F5.2 mag Vmag ?=- V magnitude
51- 54 F4.2 mag B-V ?=- B-V color index
56- 60 F5.3 mag (B-V)0 ?=- Intrinsic B-V color index
62- 67 F6.3 mag Mbol ?=- Bolometric absolute magnitude
69- 72 F4.2 [cm/s2] logg ?=- Gravity
73- 77 I5 K Teff ?=- Effective Temperature
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Note (1): Simbad nomenclature:
KC-NNN = Cl* NGC 6838 KC NNN (Cudworth, 1985AJ.....90...65C 1985AJ.....90...65C)
1-NNN = NGC 6838 1NNN (Arp & Hartwick, 1971ApJ...167..499A 1971ApJ...167..499A)
X = Cl* NGC 6838 AH X (Arp & Hartwick, 1971ApJ...167..499A 1971ApJ...167..499A)
A4 = Cl* NGC 6838 AH A4 (Arp & Hartwick, 1971ApJ...167..499A 1971ApJ...167..499A)
NNNN = not in Simbad, from Cudworth (2006, private communication)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq Star Identification
7- 14 F8.5 mag CN1 ?=- CN1 Lick Index (related to CN 4143Å)
16- 22 F7.5 mag e_CN1 ?=- Poisson uncertainty on CN1
24- 31 F8.5 mag CN2 ?=- CN2 Lick Index (related to CN 4143Å)
33- 39 F7.5 mag e_CN2 ?=- Poisson uncertainty on CN2
41- 48 F8.5 0.1nm Ca4227 ?=- Ca4227 Index
50- 56 F7.5 0.1nm e_Ca4227 ?=- Poisson uncertainty on Ca4227
58- 65 F8.5 mag G4300 ?=- G4300 Index (CH)
67- 73 F7.5 mag e_G4300 ?=- Poisson uncertainty on G4300
75- 82 F8.5 0.1nm Fe4383 ?=- Fe4383 Index on Fe4383
84- 90 F7.5 0.1nm e_Fe4383 ?=- Poisson uncertainty
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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- 5 I5 --- Seq Star Identification
7- 14 F8.5 0.1nm Hbeta ?=- Hβ Index
16- 22 F7.5 0.1nm e_Hbeta ?=- Poisson uncertainty on Hβ
24- 31 F8.5 mag Mg1 Mg1 Index (5069Å)
33- 39 F7.5 mag e_Mg1 Poisson uncertainty on Mg1
41- 48 F8.5 mag Mg2 Mg2 Index (5154Å)
50- 56 F7.5 mag e_Mg2 Poisson uncertainty on Mg2
58- 65 F8.5 0.1nm Mgb ?=- Mgb Index
67- 73 F7.5 0.1nm e_Mgb ?=- Poisson uncertainty on Mgb
75- 82 F8.5 0.1nm Fe5270 ?=- Fe5270 Index
84- 90 F7.5 0.1nm e_Fe5270 ?=- Poisson uncertainty on Fe5270
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq Star Identification
7- 14 F8.5 0.1nm Fe5335 ?=- Fe5335 Index
16- 22 F7.5 0.1nm e_Fe5335 ?=- Poisson uncertainty on Fe5335
24- 31 F8.5 0.1nm Fe5406 ?=- Fe5406 Index
33- 39 F7.5 0.1nm e_Fe5406 ?=- Poisson uncertainty on Fe5406
41- 48 F8.5 0.1nm NaD ?=- NaD Index (5879Å)
50- 56 F7.5 0.1nm e_NaD ?=- Poisson uncertainty on NaD
58- 65 F8.5 0.1nm Al3953 ?=- Al3953 Index
67- 73 F7.5 0.1nm e_Al3953 ?=- Poisson uncertainty on Al3953
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Acknowledgements:
Alan Alves Brito, abrito(at)astro.iag.usp.br
(End) Patricia Vannier [CDS] 18-Jul-2008