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1999A&A...351..519M - Astronomy and Astrophysics, volume 351, 519-525 (1999/11-2)
Blue horizontal branch stars in metal-rich globular clusters. I. NGC 6388 and NGC 6441.
MOEHLER S., SWEIGART A.V. and CATELAN M.
Abstract (from CDS):
We report the first results of an ongoing spectroscopic survey of blue horizontal branch stars in the metal-rich ([Fe/H]≃-0.5) globular clusters NGC 6388 and NGC 6441. Based on data obtained with the ESO-New Technology Telescope (NTT), we provide gravities and temperatures for four stars in NGC 6388 and three stars in NGC 6441. These results are marginally inconsistent with the predictions of canonical evolutionary theory, but disagree strongly with all non-canonical scenarios that explain the sloped horizontal branches seen in the colour-magnitude diagrams of these clusters.
Abstract Copyright: ∼
Journal keyword(s): stars: early-type - stars: fundamental parameters - stars: horizontal-branch - Galaxy: globular clusters: individual: NGC 6388 - Galaxy: globular clusters: individual: NGC 6441
Nomenclature: Table 1: Cl* NGC 6388 WF N-NN N=4, Cl* NGC 6441 WF N-NN N=3.
Simbad objects: 12
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