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- Title
A Survey for EHB Stars in the Galactic Bulge.
- Authors
Terndrup, Donald M.; An, Deokkeun; Hansen, Angela; Peterson, Ruth C.; Walker, Alistair R.; Sadler, Elaine M.
- 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.
- Subjects
HORIZONTAL branch stars; GLOBULAR clusters; UBV system (Astronomy); RADIAL velocity of stars; STELLAR spectra; COSMIC abundances; STELLAR magnitudes
- Publication
Astrophysics & Space Science, 2004, Vol 291, Issue 3/4, p247
- ISSN
0004-640X
- Publication type
Article
- DOI
10.1023/B:ASTR.0000044328.04425.c1