Galaxy formation and supernova feedback

P. B. Tissera, C. Scannapieco, S. D M White, V. Springe

Resultado de la investigación: Article

1 Cita (Scopus)

Resumen

We present a Supernova (SN) feedback model that succeeds at describing the chemical and energetic e ects of SN explosions in galaxy formation simulations. This new SN model has been coupled to GADGET-2 and works within a new multiphase scheme which allows the description of a co-spatial mixture of cold and hot interstellar medium phases. No ad hoc scale-dependent parameters are associated to these SN and multiphase models making them particularly suited to studies of galaxy formation in a cosmological framework. Our SN model succeeds not only in setting a self-regulated star formation activity in galaxies but in triggering collimated chemical-enriched galactic winds. The e ects of winds vary with the virial mass of the systems so that the smaller the galaxy, the larger the fraction of swept away gas and the stronger the decrease in its star formation activity. The fact that the fraction of ejected metals exceeds 60 per cent regardless of mass, suggests that SN feedback can be the responsible mechanism of the enrichment of the intergalactic medium to the observed levels.

Idioma originalEnglish
Páginas (desde-hasta)125-126
Número de páginas2
PublicaciónRevista Mexicana de Astronomia y Astrofisica: Serie de Conferencias
Volumen26
EstadoPublished - 2006

Huella dactilar

galactic evolution
supernovae
star formation
galaxies
galactic winds
explosion
energetics
intergalactic media
explosions
metal
gas
simulation
gases
metals
chemical

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Citar esto

Tissera, P. B. ; Scannapieco, C. ; White, S. D M ; Springe, V. / Galaxy formation and supernova feedback. En: Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias. 2006 ; Vol. 26. pp. 125-126.
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Galaxy formation and supernova feedback. / Tissera, P. B.; Scannapieco, C.; White, S. D M; Springe, V.

En: Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias, Vol. 26, 2006, p. 125-126.

Resultado de la investigación: Article

TY - JOUR

T1 - Galaxy formation and supernova feedback

AU - Tissera, P. B.

AU - Scannapieco, C.

AU - White, S. D M

AU - Springe, V.

PY - 2006

Y1 - 2006

N2 - We present a Supernova (SN) feedback model that succeeds at describing the chemical and energetic e ects of SN explosions in galaxy formation simulations. This new SN model has been coupled to GADGET-2 and works within a new multiphase scheme which allows the description of a co-spatial mixture of cold and hot interstellar medium phases. No ad hoc scale-dependent parameters are associated to these SN and multiphase models making them particularly suited to studies of galaxy formation in a cosmological framework. Our SN model succeeds not only in setting a self-regulated star formation activity in galaxies but in triggering collimated chemical-enriched galactic winds. The e ects of winds vary with the virial mass of the systems so that the smaller the galaxy, the larger the fraction of swept away gas and the stronger the decrease in its star formation activity. The fact that the fraction of ejected metals exceeds 60 per cent regardless of mass, suggests that SN feedback can be the responsible mechanism of the enrichment of the intergalactic medium to the observed levels.

AB - We present a Supernova (SN) feedback model that succeeds at describing the chemical and energetic e ects of SN explosions in galaxy formation simulations. This new SN model has been coupled to GADGET-2 and works within a new multiphase scheme which allows the description of a co-spatial mixture of cold and hot interstellar medium phases. No ad hoc scale-dependent parameters are associated to these SN and multiphase models making them particularly suited to studies of galaxy formation in a cosmological framework. Our SN model succeeds not only in setting a self-regulated star formation activity in galaxies but in triggering collimated chemical-enriched galactic winds. The e ects of winds vary with the virial mass of the systems so that the smaller the galaxy, the larger the fraction of swept away gas and the stronger the decrease in its star formation activity. The fact that the fraction of ejected metals exceeds 60 per cent regardless of mass, suggests that SN feedback can be the responsible mechanism of the enrichment of the intergalactic medium to the observed levels.

KW - Cosmology

KW - Galaxy:Formation

KW - Supernovae

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JO - Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias

JF - Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias

SN - 1405-2059

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