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A&A Supplement series, Vol. 122, May I 1997, 507-513

Received December 20 1995; accepted August 22, 1996

Kinematics of carbon stars in the outer regions of the Small Magellanic Cloud

D. Hatzidimitrioutex2html_wrap993, B.F. Croketex2html_wrap995, D.H. Morgantex2html_wrap997, and R.D. Cannontex2html_wrap999

tex2html_wrap1001  Physics Department, University of Crete, P.O.Box 2208, GR 710 03, Heraklion, Crete, Greece
tex2html_wrap1003  Royal Observatory Edinburgh, Blackford Hill, Edinburgh EH9 3HJ, Scotland, UK
tex2html_wrap1005  Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia


We present a radial velocity survey of a sample of the field population of carbon stars in the outer parts of the Small Magellanic Cloud (SMC). This first set of results includes radial velocities for 71 carbon stars, with an individual precision of tex2html_wrap_inline971 km/s. The mean heliocentric velocity of the stars (excluding one very high velocity star) is tex2html_wrap_inline973 km/s with a velocity dispersion of tex2html_wrap_inline975 km/s. These values drop to tex2html_wrap_inline977 km/s and tex2html_wrap_inline979 km/s respectively, if we exclude the stars belonging to the Outer Wing. The velocity distribution does not show the multiple peaks seen in some samples of Population I objects. The mass of the SMC as inferred from the above velocity dispersion (without the outer Wing stars) is tex2html_wrap_inline981.

keywords: stars: carbon stars -- galaxies: kinematics -- Magellanic clouds

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