J/AJ/127/373 Elemental abundances of 3 red giants in Ter 7 (Tautvaisiene+, 2004)
Elemental abundances of three red giants in Terzan 7,
a globular cluster associated with the Sagittarius galaxy.
Tautvaisiene G., Wallerstein G., Geisler D., Gonzalez G., Charbonnel C.
<Astron. J., 127, 373-379 (2004)>
=2004AJ....127..373T 2004AJ....127..373T
ADC_Keywords: Clusters, globular ; Stars, giant ; Abundances, peculiar
Keywords: galaxies: individual (Sagittarius dSph) -
globular clusters: individual (Terzan 7) - stars: abundances -
stars: late-type
Abstract:
Chemical abundances in three giants in Terzan 7, a globular cluster
associated with the Sagittarius dwarf galaxy, have been determined
using high-resolution spectra obtained with the UVES spectrograph on
the ESO 8.2m Kueyen telescope. We find the overall metallicity of the
stars to be [Fe/H]=-0.61±0.07, which is slightly higher than that
previously evaluated from photometry and used for the age
determination of this cluster. This metallicity yields an age of about
6Gyr, which is slightly lower than derived from previous estimates.
The relative abundance ratios of various chemical elements to iron lie
between those of its host galaxy's metal-poor and metal-rich stars and
reveal an intriguing similarity to the pattern seen in the Large
Magellanic Cloud.
Description:
High-resolution spectra of three known radial velocity members of
Ter 7 were obtained by D. Geisler with the UVES on the 8.2m telescope
of the European Southern Observatory on 2000 September 18 and 19.
Objects:
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RA (2000) DE Designation(s)
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19 17 43.7 -34 39 27 Cl Terzan 7 = C 1914-347
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 25 183 Equivalent Widths of Spectral Lines of Three Red
Giants in Terzan 7
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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 F5.2 --- Element Line identification (1)
7- 13 F7.2 0.1nm Lambda Wavelength in angstroms
15- 17 I3 0.1pm S16-EW ?=999 Cl* terzan 7 SL 16 equivalent width (2)
19- 21 I3 0.1pm S34-EW ?=999 Cl* terzan 7 SL 34 equivalent width (2)
23- 25 I3 0.1pm S35-EW ?=999 Cl* terzan 7 SL 35 equivalent width (2)
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Note (1): Chemical element and ionization stage
(e.g., 23.01 means singly ionized vanadium).
Note (2): In units of milliangstroms.
999 = Absent measurement.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 20-Feb-2004