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Properties of a Proper-Motion Selected Sample of Giants in the Small Magellanic Cloud Near NGC 121

Published online by Cambridge University Press:  25 May 2016

Nicholas B. Suntzeff ,
Alistair R. Walker ,
Verne V. Smith ,
Robert P. Kraft ,
Arnold Klemola  and
Peter B. Stetson
Nicholas B. Suntzeff
Affiliation:
Cerro Tololo Inter-American Observatory, La Serena, Chile
Alistair R. Walker
Affiliation:
Cerro Tololo Inter-American Observatory, La Serena, Chile
Verne V. Smith
Affiliation:
University of Texas at El Paso, Texas, USA
Robert P. Kraft
Affiliation:
UCO, UC Santa Cruz, California, USA
Arnold Klemola
Affiliation:
UCO, UC Santa Cruz, California, USA
Peter B. Stetson
Affiliation:
Dominion Astrophysical Observatory, Victoria, BC, Canada

Extract

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We observed a sample of zero proper-motion stars (μ < 0.″50 cent−1) from a field previously studied by Suntzeff et al. (1986). This field is 2°.5 NW (2.6 kpc) of the center of the SMC. We obtained spectra for ~ 40 stars in the region of the Ca II infrared triplet using the CTIO Argus fiber-fed spectrograph. We also obtained Argus echelle spectra of a single order at 6300Å with R = 18000 in one run. The low-dispersion spectra were reduced to metallicities based on the Ca II equivalent widths using the Da Costa & Armandroff (1995) technique and the metallicity scale from Zinn & West (1984). The typical abundance error is 0.12 dex. For half the sample, we have echelle velocities which are accurate to 1.5 km s−1. For the rest of the sample, the low-dispersion data yield single-observation velocities accurate to about 5 km s−1 based on repeat observations.

Type
Part 5. Stellar Populations and Surveys
Information
Symposium - International Astronomical Union , Volume 190: New Views of the Magellanic Clouds , 1999 , pp. 393 - 394
Copyright
Copyright © Astronomical Society of the Pacific 1999 

References

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