A Survey for EHB Stars in the Galactic Bulge
Abstract
We present a progress report on an extensive survey to find and characterize all types of blue 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.
Cite
@article{arxiv.astro-ph/0309700,
title = {A Survey for EHB Stars in the Galactic Bulge},
author = {Donald M. Terndrup and Deokkeun An and Angela Hansen and Ruth C. Peterson and Alistair R. Walker and Elaine M. Sadler},
journal= {arXiv preprint arXiv:astro-ph/0309700},
year = {2009}
}
Comments
To appear in "Extreme Horizontal Branch Stars and Related Objects", Astrophysics and Space Science, Kluwer Academic Publishers, proceedings of the meeting held in Keele, UK, June 16-20, 2003