Preliminary proper motion analysis of the Carina dwarf spheroidal
Abstract
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.
- Publication:
-
A Giant Step: from Milli- to Micro-arcsecond Astrometry
- Pub Date:
- July 2008
- DOI:
- 10.1017/S174392130801990X
- Bibcode:
- 2008IAUS..248..492C
- Keywords:
-
- galaxies: dwarf;
- galaxies: individual (Carina dSph);
- astrometry