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Proper Motions in the Bulge: Looking Through Plaut's Low Extinction Window

Published online by Cambridge University Press:  25 May 2016

R.A. Méndez ,
R.M. Rich ,
W.F. Van Altena ,
T.M. Girard ,
S. Van Den Bergh  and
S.R. Majewski
R.A. Méndez
Affiliation:
European Southern Observatory
R.M. Rich
Affiliation:
Columbia University, Astronomy Department
W.F. Van Altena
Affiliation:
Yale University, Astronomy Department
T.M. Girard
Affiliation:
Yale University, Astronomy Department
S. Van Den Bergh
Affiliation:
Dominion Astrophysical Observatory
S.R. Majewski
Affiliation:
University of Virginia, Department of Astronomy

Extract

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We are conducting the deepest and largest photographic proper-motion survey ever undertaken of the Galactic bulge. Our first-epoch plate material (from 1972-3) goes deep enough (Vlim ∼ 22) to reach below the bulge main-sequence turnoff. These plates cover an area of approximately 25′ × 25′ of the bulge in the low-extinction (Av ∼ 0.8 mag) Plaut field at l= 0°, b= −8°, approximately 1 kpc south of the nucleus. This is the point at which the transition between bulge and halo populations likely occurs and is, therefore, an excellent location to study the interface between the dense metal-rich bulge and the metal-poor halo.

Type
Part 4. Galactic Structure
Information
Symposium - International Astronomical Union , Volume 179: New Horizons from Multi-Wavelength Sky Surveys , 1998 , pp. 223 - 224
Copyright
Copyright © Kluwer 1998 

References

Méndez, R.A., Rich, R.M., van Altena, W.F., Girard, T.M., van den Bergh, S., & Majewski, S.R., 1996, in “The Galactic Center,” 4th ESO/CTIO Workshop, Astron. Soc. Pacific Conference Series, 102, Gredel, R., ed. (ASP, San Francisco) p. 345.Google Scholar
Spaenhauer, A., Jones, B.F., Whitford, E., 1992, Astron. J., 103, 297.Google Scholar