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 revistaArtículorevisión exhaustiva

23 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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