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Preliminary proper motion analysis of the Carina dwarf spheroidal

Published online by Cambridge University Press:  01 October 2007

J. L. Carlin ,
S. R. Majewski ,
D.I. Casetti-Dinescu  and
T. M. Girard
J. L. Carlin
Affiliation:
Dept. of Astronomy, Univ. of Virginia, PO Box 400325, Charlottesville, VA 22904-4325USA
S. R. Majewski
Affiliation:
Dept. of Astronomy, Univ. of Virginia, PO Box 400325, Charlottesville, VA 22904-4325USA
D.I. Casetti-Dinescu
Affiliation:
Dept. of Astronomy, Univ. of Virginia, PO Box 400325, Charlottesville, VA 22904-4325USA
T. M. Girard
Affiliation:
Dept. of Astronomy, Univ. of Virginia, PO Box 400325, Charlottesville, VA 22904-4325USA
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Abstract

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We present preliminary results from a proper motion study of the Carina dwarf spheroidal galaxy. Our proper motions show a scatter of ~1.1 mas yr−1 per Carina member star, and we determinate the mean ensemble motion to an accuracy of ~7 mas century−1. While this is a precise measurement of the relative proper motions of Carina members, our correction to an absolute frame is limited by the small number of measured QSOs in the field.

Keywords

galaxies: dwarfgalaxies: individual (Carina dSph)astrometry
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S248: A Giant Step: from Milli- to Micro-arcsecond Astrometry , October 2007 , pp. 492 - 493
Copyright
Copyright © International Astronomical Union 2008

References

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