Astrophysics and Space Science

, Volume 291, Issue 3, pp 247–252

A Survey for EHB Stars in the Galactic Bulge

  • Donald M. Terndrup
  • Deokkeun An
  • Angela Hansen
  • Ruth C. Peterson
  • Alistair R. Walker
  • Elaine M. Sadler
Article

DOI: 10.1023/B:ASTR.0000044328.04425.c1

Cite this article as:
Terndrup, D.M., An, D., Hansen, A. et al. Astrophys Space Sci (2004) 291: 247. doi:10.1023/B:ASTR.0000044328.04425.c1

Abstract

We present a progress report on an extensive survey to find and characterize all types of horizontal-branch stars in the nuclear bulge of the Galaxy. We have obtained wide, shallow imaging in UBV of ≈12 square degrees in the bulge, with follow-up spectroscopy for radial velocities and metal abundance determinations. We have discovered a number of metal-rich blue HB stars, whose presence in the bulge is expected by the interpretation of the extragalactic ultraviolet excess. Very deep images have been obtained in UBV and SDSS u along the bulge minor axis, which reveal a significant number of EHB candidates fainter than B=19, i.e., with the same absolute magnitudes as EHB stars in several globular clusters.

stars: horizontal-branch stars: evolution galaxy: bulge 

Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • Donald M. Terndrup
    • 1
  • Deokkeun An
    • 1
  • Angela Hansen
    • 1
  • Ruth C. Peterson
    • 2
  • Alistair R. Walker
    • 3
  • Elaine M. Sadler
    • 4
  1. 1.Department of AstronomyThe Ohio State UniversityColumbusUSA
  2. 2.Astrophysical AdvancesPalo AltoUSA
  3. 3.NOAO/CTIOLa SerenaChile
  4. 4.School of Physics, University of SydneyAustralia

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