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Tissera, P.B.; Beers, T.C.; Carollo, D.; Scannapieco, C. "Stellar haloes in Milky Way mass galaxies: From the inner to the outer haloes" (2014) Monthly Notices of the Royal Astronomical Society. 439(3):3128-3138
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Abstract:

We present a comprehensive study of the chemical properties of the stellar haloes of Milky Way mass galaxies, analysing the transition between the inner to the outer haloes. We find the transition radius between the relative dominance of the inner-halo and outer-halo stellar populations to be ̃15-20 kpc for most of our haloes, similar to that inferred for the Milky Way from recent observations. While the number density of stars in the simulated inner-halo populations decreases rapidly with distance, the outer-halo populations contribute about 20-40 per cent in the fiducial solar neighbourhood, in particular at the lowest metallicities. We have determined [Fe/H] profiles for our simulated haloes; they exhibit flat or mild gradients, in the range [-0.002, -0.01] dex kpc-1. The metallicity distribution functions exhibit different features, reflecting the different assembly history of the individual stellar haloes. We find that stellar haloes formed with larger contributions from massive subgalactic systems have steeper metallicity gradients. Very metal-poor stars are mainly contributed to the halo systems by lower mass satellites. There is a clear trend among the predicted metallicity distribution functions that a higher fraction of low-metallicity stars are found with increasing radius. These properties are consistent with the range of behaviours observed for stellar haloes of nearby galaxies. © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.

Registro:

Documento: Artículo
Título:Stellar haloes in Milky Way mass galaxies: From the inner to the outer haloes
Autor:Tissera, P.B.; Beers, T.C.; Carollo, D.; Scannapieco, C.
Filiación:Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Av. Rivadavia 1917, Ciudad Autónoma de Buenos Aires, C1033AAJ, Argentina
Instituto de Astronomía y Física del Espacio, Casilla de Correos 67, Suc. 28, 1428 Buenos Aires, Argentina
National Optical Astronomy Observatory, JINA: Joint Institute for Nuclear Astrophysics, Tucson, AZ 85719, United States
Department of Physics and Astronomy, Macquarie University, Sydney, 2109 NSW, Australia
Leibniz-Institut fr Astrophysik Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam, Germany
Physics Department, Universidad Andres Bello, Av Republica 237, 8320000 Santiago, Chile
Palabras clave:Evolution-galaxies; Formation-cosmology; Galaxy; Structure-galaxies; Theory
Año:2014
Volumen:439
Número:3
Página de inicio:3128
Página de fin:3138
DOI: http://dx.doi.org/10.1093/mnras/stu181
Título revista:Monthly Notices of the Royal Astronomical Society
Título revista abreviado:Mon. Not. R. Astron. Soc.
ISSN:00358711
CODEN:MNRAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v439_n3_p3128_Tissera

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Citas:

---------- APA ----------
Tissera, P.B., Beers, T.C., Carollo, D. & Scannapieco, C. (2014) . Stellar haloes in Milky Way mass galaxies: From the inner to the outer haloes. Monthly Notices of the Royal Astronomical Society, 439(3), 3128-3138.
http://dx.doi.org/10.1093/mnras/stu181
---------- CHICAGO ----------
Tissera, P.B., Beers, T.C., Carollo, D., Scannapieco, C. "Stellar haloes in Milky Way mass galaxies: From the inner to the outer haloes" . Monthly Notices of the Royal Astronomical Society 439, no. 3 (2014) : 3128-3138.
http://dx.doi.org/10.1093/mnras/stu181
---------- MLA ----------
Tissera, P.B., Beers, T.C., Carollo, D., Scannapieco, C. "Stellar haloes in Milky Way mass galaxies: From the inner to the outer haloes" . Monthly Notices of the Royal Astronomical Society, vol. 439, no. 3, 2014, pp. 3128-3138.
http://dx.doi.org/10.1093/mnras/stu181
---------- VANCOUVER ----------
Tissera, P.B., Beers, T.C., Carollo, D., Scannapieco, C. Stellar haloes in Milky Way mass galaxies: From the inner to the outer haloes. Mon. Not. R. Astron. Soc. 2014;439(3):3128-3138.
http://dx.doi.org/10.1093/mnras/stu181