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Title: THE VERTICAL COMPOSITION OF NEUTRINO-DOMINATED ACCRETION DISKS IN GAMMA-RAY BURSTS

Abstract

We investigate the vertical structure and element distribution of neutrino-dominated accretion flows around black holes in spherical coordinates using the reasonable nuclear statistical equilibrium. According to our calculations, heavy nuclei tend to be produced in a thin region near the disk surface, whose mass fractions are primarily determined by the accretion rate and vertical distribution of temperature and density. In this thin region, we find that {sup 56}Ni is dominant for the flow with a low accretion rate (e.g., 0.05 M {sub Sun} s{sup -1}), but {sup 56}Fe is dominant for the flow with a high accretion rate (e.g., 1 M {sub Sun} s{sup -1}). The dominant {sup 56}Ni in the aforementioned region may provide a clue to understanding the bumps in the optical light curve of core-collapse supernovae.

Authors:
; ; ;  [1]
  1. Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen, Fujian 361005 (China)
Publication Date:
OSTI Identifier:
22167257
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 762; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCRETION DISKS; BLACK HOLES; COSMIC GAMMA BURSTS; COSMIC NEUTRINOS; ELEMENT ABUNDANCE; HEAVY NUCLEI; IRON 56; NICKEL 56; NUCLEOSYNTHESIS; SUPERNOVAE; VISIBLE RADIATION

Citation Formats

Liu, Tong, Xue, Li, Gu, Wei-Min, and Lu, Ju-Fu. THE VERTICAL COMPOSITION OF NEUTRINO-DOMINATED ACCRETION DISKS IN GAMMA-RAY BURSTS. United States: N. p., 2013. Web. doi:10.1088/0004-637X/762/2/102.
Liu, Tong, Xue, Li, Gu, Wei-Min, & Lu, Ju-Fu. THE VERTICAL COMPOSITION OF NEUTRINO-DOMINATED ACCRETION DISKS IN GAMMA-RAY BURSTS. United States. https://doi.org/10.1088/0004-637X/762/2/102
Liu, Tong, Xue, Li, Gu, Wei-Min, and Lu, Ju-Fu. 2013. "THE VERTICAL COMPOSITION OF NEUTRINO-DOMINATED ACCRETION DISKS IN GAMMA-RAY BURSTS". United States. https://doi.org/10.1088/0004-637X/762/2/102.
@article{osti_22167257,
title = {THE VERTICAL COMPOSITION OF NEUTRINO-DOMINATED ACCRETION DISKS IN GAMMA-RAY BURSTS},
author = {Liu, Tong and Xue, Li and Gu, Wei-Min and Lu, Ju-Fu},
abstractNote = {We investigate the vertical structure and element distribution of neutrino-dominated accretion flows around black holes in spherical coordinates using the reasonable nuclear statistical equilibrium. According to our calculations, heavy nuclei tend to be produced in a thin region near the disk surface, whose mass fractions are primarily determined by the accretion rate and vertical distribution of temperature and density. In this thin region, we find that {sup 56}Ni is dominant for the flow with a low accretion rate (e.g., 0.05 M {sub Sun} s{sup -1}), but {sup 56}Fe is dominant for the flow with a high accretion rate (e.g., 1 M {sub Sun} s{sup -1}). The dominant {sup 56}Ni in the aforementioned region may provide a clue to understanding the bumps in the optical light curve of core-collapse supernovae.},
doi = {10.1088/0004-637X/762/2/102},
url = {https://www.osti.gov/biblio/22167257}, journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 762,
place = {United States},
year = {Thu Jan 10 00:00:00 EST 2013},
month = {Thu Jan 10 00:00:00 EST 2013}
}