Chemical abundances and spatial distribution of long gamma-ray bursts

M. C. Artale, L. J. Pellizza, P. B. Tissera

Resultado de la investigación: Article

5 Citas (Scopus)

Resumen

We analyse the spatial distribution within host galaxies and chemical properties of the progenitors of long gamma-ray bursts (LGRBs) as a function of redshift. By using hydrodynamical cosmological simulations, which include star formation, supernova feedback and chemical enrichment, and based on the hypothesis of the collapsar model with low metallicity, we investigate the progenitors in the range 0 < z < 3. Our results suggest that the sites of these phenomena tend to be located in the central regions of the hosts at high redshifts but move outwards for lower ones. We find that scenarios with low metallicity cut-offs best fit current observations. For these scenarios, LGRBs tend to be [Fe/H]-poor and show a strong α-enhancement evolution towards lower values as redshift decreases. The variation of typical burst sites with redshift would imply that they might be tracing different parts of galaxies at different redshifts.

Idioma originalEnglish
Páginas (desde-hasta)3417-3422
Número de páginas6
PublicaciónMonthly Notices of the Royal Astronomical Society
Volumen415
N.º4
DOI
EstadoPublished - ago 2011

Huella dactilar

gamma ray bursts
metallicity
chemical property
spatial distribution
galaxies
tracing
chemical properties
simulation
supernovae
star formation
bursts
augmentation
chemical

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Citar esto

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abstract = "We analyse the spatial distribution within host galaxies and chemical properties of the progenitors of long gamma-ray bursts (LGRBs) as a function of redshift. By using hydrodynamical cosmological simulations, which include star formation, supernova feedback and chemical enrichment, and based on the hypothesis of the collapsar model with low metallicity, we investigate the progenitors in the range 0 < z < 3. Our results suggest that the sites of these phenomena tend to be located in the central regions of the hosts at high redshifts but move outwards for lower ones. We find that scenarios with low metallicity cut-offs best fit current observations. For these scenarios, LGRBs tend to be [Fe/H]-poor and show a strong α-enhancement evolution towards lower values as redshift decreases. The variation of typical burst sites with redshift would imply that they might be tracing different parts of galaxies at different redshifts.",
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Chemical abundances and spatial distribution of long gamma-ray bursts. / Artale, M. C.; Pellizza, L. J.; Tissera, P. B.

En: Monthly Notices of the Royal Astronomical Society, Vol. 415, N.º 4, 08.2011, p. 3417-3422.

Resultado de la investigación: Article

TY - JOUR

T1 - Chemical abundances and spatial distribution of long gamma-ray bursts

AU - Artale, M. C.

AU - Pellizza, L. J.

AU - Tissera, P. B.

PY - 2011/8

Y1 - 2011/8

N2 - We analyse the spatial distribution within host galaxies and chemical properties of the progenitors of long gamma-ray bursts (LGRBs) as a function of redshift. By using hydrodynamical cosmological simulations, which include star formation, supernova feedback and chemical enrichment, and based on the hypothesis of the collapsar model with low metallicity, we investigate the progenitors in the range 0 < z < 3. Our results suggest that the sites of these phenomena tend to be located in the central regions of the hosts at high redshifts but move outwards for lower ones. We find that scenarios with low metallicity cut-offs best fit current observations. For these scenarios, LGRBs tend to be [Fe/H]-poor and show a strong α-enhancement evolution towards lower values as redshift decreases. The variation of typical burst sites with redshift would imply that they might be tracing different parts of galaxies at different redshifts.

AB - We analyse the spatial distribution within host galaxies and chemical properties of the progenitors of long gamma-ray bursts (LGRBs) as a function of redshift. By using hydrodynamical cosmological simulations, which include star formation, supernova feedback and chemical enrichment, and based on the hypothesis of the collapsar model with low metallicity, we investigate the progenitors in the range 0 < z < 3. Our results suggest that the sites of these phenomena tend to be located in the central regions of the hosts at high redshifts but move outwards for lower ones. We find that scenarios with low metallicity cut-offs best fit current observations. For these scenarios, LGRBs tend to be [Fe/H]-poor and show a strong α-enhancement evolution towards lower values as redshift decreases. The variation of typical burst sites with redshift would imply that they might be tracing different parts of galaxies at different redshifts.

KW - Galaxies: abundances

KW - Galaxies: evolution

KW - Gamma-ray burst: general

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U2 - 10.1111/j.1365-2966.2011.18955.x

DO - 10.1111/j.1365-2966.2011.18955.x

M3 - Article

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JO - Monthly Notices of the Royal Astronomical Society

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SN - 0035-8711

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