| Autor: |
Terndrup, Donald M., An, Deokkeun, Hansen, Angela, Peterson, Ruth C., Walker, Alistair R., Sadler, Elaine M. |
| Předmět: |
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| Zdroj: |
Astrophysics & Space Science; 2004, Vol. 291 Issue 3/4, p247-252, 6p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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