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

Resultado de la investigación: Contribución a una revistaArtículo

21 Citas (Scopus)

Resumen

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.

Idioma originalInglés
Páginas (desde-hasta)L175-L178
PublicaciónAstrophysical Journal
Volumen499
N.º2 PART II
DOI
EstadoPublicada - 1998

Áreas temáticas de ASJC Scopus

  • Astronomía y astrofísica
  • Ciencias planetarias y espacial

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