@article{d4799d90ced44230988aef9d4a8427c2,
title = "Detection of lithium in a main-sequence bulge star using keck i as a 15 meter diameter telescope",
abstract = "The bulge contains the most chemically evolved old stellar population in the Milky Way. Thanks to microlensing, it is now possible to obtain high-resolution echelle spectra of bulge stars near the main-sequence turnoff and study the abundance of elements that are affected by stellar evolution, such as lithium. We have observed with the HIRES spectrograph on the Keck I 10 m telescope the source star of the MACHO microlensing event 97 BLG 45, while it was magnified by ∼1 mag. Here we report the detection of the Li i line at 6707.8 {\AA} in the echelle spectrum of this star and measure the bulge lithium abundance for the first time: A(Li) = 2.25 ±0.25.",
keywords = "Galaxy: stellar content, Stars: Population ii, Stars: abundances",
author = "D. Mlnniti and T. Vandehei and Cook, {K. H.} and K. Griest and C. Alcock",
note = "Funding Information: This work would not have been possible without the MACHO microlensing alerts, and special thanks are due to A. Becker, D. Bennett, and E. Turner of the MACHO-GMAN teams. We are grateful for the useful comments from C. Sneden, J. Bahcall, D. Lennon, P. Molaro, D. Valls-Gabaud, and the anonymous referee. We would like to thank S. Burles and S. Marshall for help with the HIRES software. Thanks also to the W. M. Keck Observatory, where the observations were obtained. Work at LLNL is supported by DOE contract W7405-ENG-48, and work at UCSD is supported by DoE grant DE-FG03-90ER40546 and by the Alfred P. Sloan Foundation.",
year = "1998",
doi = "10.1086/311360",
language = "English",
volume = "499",
pages = "L175--L178",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2 PART II",
}