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

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


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.

Original languageEnglish
Pages (from-to)247-252
Number of pages6
JournalAstrophysics and Space Science
Issue number3-4
StatePublished - 2004


  • bulge
  • evolution
  • galaxy:
  • horizontal-branch
  • stars:


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