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Measuring proper motions of galactic dwarf galaxies with Hubble Space Telescope

Published online by Cambridge University Press:  01 October 2007

S. Piatek  and
C. Pryor
S. Piatek
Affiliation:
Department of Physics, New Jersey Institute of Technology, Newark, NJ 07102-1982, USA email: [email protected]
C. Pryor
Affiliation:
Dept. of Physics and Astronomy, Rutgers, the State University of New Jersey136 Frelinghuysen Rd.Piscataway, NJ 08854–8019, USA email: [email protected]
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Abstract

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Over the past several years, our research group has been measuring proper motions for nearby dwarf satellite galaxies using data taken with the Hubble Space Telescope. In order to measure proper motions with an expected size of several tens of milliarcseconds per century using a time baseline of 2-4 years, our work required that positions of stars and QSOs be measured to an accuracy of ~0.25 mas (~0.005 pixel). This contribution reviews the scientific justification of this work and our methodology. It concludes with a few general results and future directions.

Keywords

astrometrygalaxies: dwarfLocal Groupmethods: data analysis
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. 244 - 247
Copyright
Copyright © International Astronomical Union 2008

References

Bristow, P. & Alexov, A. 2002, ST-ECF Instrument Science Report CE-STIS – 2002-001Google Scholar
Dinescu, D. I., Girard, T. M., van Altena, W. F., & Lopez, C. E. 2005, ApJ, 618, L25Google Scholar
Dinescu, D. I., Kinney, B. A., Majewski, S. R., & Girard, T. M. 2004, AJ, 128, 687Google Scholar
Kallivayalil, N., van der Marel, R. P., Alcock, C., Axelrod, T., Cook, K. H., Drake, A. J., & Geha, M. 2006a, ApJ, 638, 772CrossRefGoogle Scholar
Kallivayalil, N., van der Marel, R. P., & Alcock, C. 2006b, ApJ, 652, 1213Google Scholar
Kang, X., Mao, S., Gao, L., & Jing, Y. P. 2005, A&A, 437, 383Google Scholar
Kroupa, P. & Bastian, U. 1997, NewA, 2, 77Google Scholar
Kroupa, P., Theis, C., & Boily, C. M. 2005, A&A, 431, 517Google Scholar
Klypin, A., Kravtsov, A. V., Valenzuela, O., & Prada, F. 1999, ApJ, 522, 82Google Scholar
Lynden-Bell, D. & Lynden-Bell, R. M. 1995, MNRAS, 275, 429Google Scholar
Moore, B., Diemand, J., Madau, P., Zemp, M., & Stadel, J. 2006, MNRAS, 368, 563Google Scholar
Pedreros, M., Costa, E., & Mendez, R. A. 2006, AJ, 131, 146CrossRefGoogle Scholar
Piatek, S. et al. 2007, AJ, 133, 818Google Scholar
Schweitzer, A. E., Cudworth, K. M., Majewski, S. R., & Suntzeff, N. B. 1995, AJ, 110, 2747Google Scholar
Zentner, A. R., Kravtsov, A. V., Gnedin, O. Y., & Klypin, A. A. 2005, ApJ, 629, 219Google Scholar