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Titolo:
The cosmic gamma-ray background in the MeV range
Autore:
Ruiz-Lapuente, P; Casse, M; Vangioni-Flam, E;
Indirizzi:
Univ Barcelona, Dept Astron, E-08028 Barcelona, Spain Univ Barcelona Barcelona Spain E-08028 Astron, E-08028 Barcelona, Spain Max Planck Inst Astrophys, D-87540 Garching, Germany Max Planck Inst Astrophys Garching Germany D-87540 540 Garching, Germany Inst Astrophys Paris, F-75014 Paris, France Inst Astrophys Paris Paris France F-75014 s Paris, F-75014 Paris, France CEA, DAPNIA, DSM, Serv Astrophys, Gif Sur Yvette, France CEA Gif Sur Yvette France , DSM, Serv Astrophys, Gif Sur Yvette, France
Titolo Testata:
ASTROPHYSICAL JOURNAL
fascicolo: 1, volume: 549, anno: 2001,
parte:, 1
pagine: 483 - 494
SICI:
0004-637X(20010301)549:1<483:TCGBIT>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUBBLE DEEP FIELD; STAR-FORMATION HISTORY; IA SUPERNOVA RATE; HIGH-REDSHIFT; X-RAY; DEUTERIUM ABUNDANCE; LUMINOSITY FUNCTION; WHITE-DWARFS; GALAXIES; PROGENITORS;
Keywords:
diffuse radiation; gamma rays : theory; supernovae : general;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
98
Recensione:
Indirizzi per estratti:
Indirizzo: Ruiz-Lapuente, P Univ Barcelona, Dept Astron, Marti & Franques 1, E-08028 Barcelona, Spain Univ Barcelona Marti & Franques 1 Barcelona Spain E-08028
Citazione:
P. Ruiz-Lapuente et al., "The cosmic gamma-ray background in the MeV range", ASTROPHYS J, 549(1), 2001, pp. 483-494

Abstract

The gamma -ray background from supernovae is calculated on the basis of the reconstructed efficiency of supernova explosions from star formation at various redshifts. The calculations presented here show how Type Ia supernova (SN) rates compatible with the results of optical supernova searches givea background emission in the MeV range that can explain the extragalactic emission measured by COMPTEL and the Solar Maximum Mission (SMM). Star formation histories reaching maximum values of 0.3-0.4 M-. yr(-1) Mpc(-3) at z similar to 1.5 (and/or possibly keeping that value to higher z) give a gamma -ray background compatible with observations, while they also predict theobserved supernova rates per comoving volume. While supernova rates are sensitive to the cosmology and details of star formation history along z, thegamma -ray background in the MeV range is very weakly dependent on the cosmology and compatible with a range of star formation histories. It is mostly sensitive to the star formation rate at z similar to 1-2, but the activity in forming stars at even higher z has an influence as well on the absolute level of the cosmic gamma -ray background; the time elapsed by the SNe Iaprogenitors until they explode has a broad distribution and the rates of SNe Ia at z similar to 1.5-2 depend on the formation frequencies of their progenitor stars at earlier epochs. The mutual consistency of predictions of optical rates and integrated emission in the gamma -ray domain place on firm ground the Type Ia supernova identification as the astrophysical source responsible for this cosmic background.

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Documento generato il 11/07/20 alle ore 17:31:46