Kinematic evidence for an old stellar halo in the large Magellanic Cloud

Dante Minniti, Jura Borissova, Marina Rejkuba, David R. Alves, Kem H. Cook, Kenneth C. Freeman

Resultado de la investigación: Article

55 Citas (Scopus)

Resumen

The oldest and most metal-poor Milky Way stars form a kinematically hot halo, which motivates the two major formation scenarios for our galaxy: extended hierarchical accretion and rapid collapse. RR Lyrae stars are excellent tracers of old and metal-poor populations. We measured the kinematics of 43 RR Lyrae stars in the inner regions of the nearby Large Magellanic Cloud (LMC) galaxy. The velocity dispersion equals 53 ± 10 kilometers per second, which indicates that a kinematically hot metal-poor old halo also exists in the LMC. This result suggests that our galaxy and smaller late-type galaxies such as the LMC have similar early formation histories.

Idioma originalEnglish
Páginas (desde-hasta)1508-1510
Número de páginas3
PublicaciónScience
Volumen301
N.º5639
DOI
EstadoPublished - 12 sep 2003

Huella dactilar

Galaxies
Biomechanical Phenomena
Metals
Population

ASJC Scopus subject areas

  • General

Citar esto

Minniti, D., Borissova, J., Rejkuba, M., Alves, D. R., Cook, K. H., & Freeman, K. C. (2003). Kinematic evidence for an old stellar halo in the large Magellanic Cloud. Science, 301(5639), 1508-1510. https://doi.org/10.1126/science.1088529
Minniti, Dante ; Borissova, Jura ; Rejkuba, Marina ; Alves, David R. ; Cook, Kem H. ; Freeman, Kenneth C. / Kinematic evidence for an old stellar halo in the large Magellanic Cloud. En: Science. 2003 ; Vol. 301, N.º 5639. pp. 1508-1510.
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abstract = "The oldest and most metal-poor Milky Way stars form a kinematically hot halo, which motivates the two major formation scenarios for our galaxy: extended hierarchical accretion and rapid collapse. RR Lyrae stars are excellent tracers of old and metal-poor populations. We measured the kinematics of 43 RR Lyrae stars in the inner regions of the nearby Large Magellanic Cloud (LMC) galaxy. The velocity dispersion equals 53 ± 10 kilometers per second, which indicates that a kinematically hot metal-poor old halo also exists in the LMC. This result suggests that our galaxy and smaller late-type galaxies such as the LMC have similar early formation histories.",
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Minniti, D, Borissova, J, Rejkuba, M, Alves, DR, Cook, KH & Freeman, KC 2003, 'Kinematic evidence for an old stellar halo in the large Magellanic Cloud', Science, vol. 301, n.º 5639, pp. 1508-1510. https://doi.org/10.1126/science.1088529

Kinematic evidence for an old stellar halo in the large Magellanic Cloud. / Minniti, Dante; Borissova, Jura; Rejkuba, Marina; Alves, David R.; Cook, Kem H.; Freeman, Kenneth C.

En: Science, Vol. 301, N.º 5639, 12.09.2003, p. 1508-1510.

Resultado de la investigación: Article

TY - JOUR

T1 - Kinematic evidence for an old stellar halo in the large Magellanic Cloud

AU - Minniti, Dante

AU - Borissova, Jura

AU - Rejkuba, Marina

AU - Alves, David R.

AU - Cook, Kem H.

AU - Freeman, Kenneth C.

PY - 2003/9/12

Y1 - 2003/9/12

N2 - The oldest and most metal-poor Milky Way stars form a kinematically hot halo, which motivates the two major formation scenarios for our galaxy: extended hierarchical accretion and rapid collapse. RR Lyrae stars are excellent tracers of old and metal-poor populations. We measured the kinematics of 43 RR Lyrae stars in the inner regions of the nearby Large Magellanic Cloud (LMC) galaxy. The velocity dispersion equals 53 ± 10 kilometers per second, which indicates that a kinematically hot metal-poor old halo also exists in the LMC. This result suggests that our galaxy and smaller late-type galaxies such as the LMC have similar early formation histories.

AB - The oldest and most metal-poor Milky Way stars form a kinematically hot halo, which motivates the two major formation scenarios for our galaxy: extended hierarchical accretion and rapid collapse. RR Lyrae stars are excellent tracers of old and metal-poor populations. We measured the kinematics of 43 RR Lyrae stars in the inner regions of the nearby Large Magellanic Cloud (LMC) galaxy. The velocity dispersion equals 53 ± 10 kilometers per second, which indicates that a kinematically hot metal-poor old halo also exists in the LMC. This result suggests that our galaxy and smaller late-type galaxies such as the LMC have similar early formation histories.

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Minniti D, Borissova J, Rejkuba M, Alves DR, Cook KH, Freeman KC. Kinematic evidence for an old stellar halo in the large Magellanic Cloud. Science. 2003 sep 12;301(5639):1508-1510. https://doi.org/10.1126/science.1088529