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: Article

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 originalEnglish
PublicaciónAstrophysical Journal
Volumen499
N.º2 PART II
EstadoPublished - 1 ene 1998

Huella dactilar

lithium
telescopes
stars
massive compact halo objects
stellar evolution
spectrographs
high resolution
detection

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Mlnniti, D. ; Vandehei, T. ; Cook, K. H. ; Griest, K. ; Alcock, C. / Detection of lithium in a main-sequence bulge star using keck i as a 15 meter diameter telescope. En: Astrophysical Journal. 1998 ; Vol. 499, N.º 2 PART II.
@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: abundances, Stars: Population ii",
author = "D. Mlnniti and T. Vandehei and Cook, {K. H.} and K. Griest and C. Alcock",
year = "1998",
month = "1",
day = "1",
language = "English",
volume = "499",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2 PART II",

}

Detection of lithium in a main-sequence bulge star using keck i as a 15 meter diameter telescope. / Mlnniti, D.; Vandehei, T.; Cook, K. H.; Griest, K.; Alcock, C.

En: Astrophysical Journal, Vol. 499, N.º 2 PART II, 01.01.1998.

Resultado de la investigación: Article

TY - JOUR

T1 - Detection of lithium in a main-sequence bulge star using keck i as a 15 meter diameter telescope

AU - Mlnniti, D.

AU - Vandehei, T.

AU - Cook, K. H.

AU - Griest, K.

AU - Alcock, C.

PY - 1998/1/1

Y1 - 1998/1/1

N2 - 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.

AB - 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.

KW - Galaxy: stellar content

KW - Stars: abundances

KW - Stars: Population ii

UR - http://www.scopus.com/inward/record.url?scp=4244163403&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:4244163403

VL - 499

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2 PART II

ER -