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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
Extract
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