Detection of lithium in a main-sequence bulge star using keck i as a 15 meter diameter telescope

D. Mlnniti, T. Vandehei, K. H. Cook, K. Griest, C. Alcock

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

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 Å in the echelle spectrum of this star and measure the bulge lithium abundance for the first time: A(Li) = 2.25 ±0.25.

Original languageEnglish
Pages (from-to)L175-L178
JournalAstrophysical Journal
Volume499
Issue number2 PART II
DOIs
Publication statusPublished - 1998

Keywords

  • Galaxy: stellar content
  • Stars: Population ii
  • Stars: abundances

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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