The impact of ionizing radiation on the formation of a supermassive star
in the early Universe
S. Chon, and M. Latif. (2016)cite arxiv:1611.08594Comment: 11 pages, 9 figures, to be submitted to MNRAS.
Abstract
A massive primordial halo near an intensely star forming galaxy may collapse
into a supermassive star (SMS) and leave a massive black hole seed of about
$10^5~M_sun$. To investigate the impact of ionizing radiation on the
formation of an SMS from a nearby galaxy, we perform three-dimensional
radiation hydrodynamical simulations by selecting a pair of massive dark matter
halos forming at $z >10$. We find that rich structures such as clumps and
filaments around the source galaxy shield the cloud from ionizing radiation. In
fact, in some cases cloud collapse is accelerated under ionizing radiation.
This fact suggests that the ionization of the cloud's surroundings helps its
collapse. Only strong radiation at the early stage of structure formation can
halt the cloud collapse, but this is much stronger than observationally allowed
value. We also explored the effect of ionizing radiation on a sample of 68
halos by employing an analytical model and found that increase in the mean
density of the gas between the SMS forming cloud and the source galaxy protects
the gas cloud from ionizing radiation as they approach each other. Thus, we
conclude that ionizing radiation does not prevent the formation of an SMS in
most of the cases.
Description
[1611.08594] The impact of ionizing radiation on the formation of a supermassive star in the early Universe
%0 Generic
%1 chon2016impact
%A Chon, Sunmyon
%A Latif, Muhammad A.
%D 2016
%K formation ionizing massive radiation star
%T The impact of ionizing radiation on the formation of a supermassive star
in the early Universe
%U http://arxiv.org/abs/1611.08594
%X A massive primordial halo near an intensely star forming galaxy may collapse
into a supermassive star (SMS) and leave a massive black hole seed of about
$10^5~M_sun$. To investigate the impact of ionizing radiation on the
formation of an SMS from a nearby galaxy, we perform three-dimensional
radiation hydrodynamical simulations by selecting a pair of massive dark matter
halos forming at $z >10$. We find that rich structures such as clumps and
filaments around the source galaxy shield the cloud from ionizing radiation. In
fact, in some cases cloud collapse is accelerated under ionizing radiation.
This fact suggests that the ionization of the cloud's surroundings helps its
collapse. Only strong radiation at the early stage of structure formation can
halt the cloud collapse, but this is much stronger than observationally allowed
value. We also explored the effect of ionizing radiation on a sample of 68
halos by employing an analytical model and found that increase in the mean
density of the gas between the SMS forming cloud and the source galaxy protects
the gas cloud from ionizing radiation as they approach each other. Thus, we
conclude that ionizing radiation does not prevent the formation of an SMS in
most of the cases.
@misc{chon2016impact,
abstract = {A massive primordial halo near an intensely star forming galaxy may collapse
into a supermassive star (SMS) and leave a massive black hole seed of about
$10^5~M_{sun}$. To investigate the impact of ionizing radiation on the
formation of an SMS from a nearby galaxy, we perform three-dimensional
radiation hydrodynamical simulations by selecting a pair of massive dark matter
halos forming at $z >10$. We find that rich structures such as clumps and
filaments around the source galaxy shield the cloud from ionizing radiation. In
fact, in some cases cloud collapse is accelerated under ionizing radiation.
This fact suggests that the ionization of the cloud's surroundings helps its
collapse. Only strong radiation at the early stage of structure formation can
halt the cloud collapse, but this is much stronger than observationally allowed
value. We also explored the effect of ionizing radiation on a sample of 68
halos by employing an analytical model and found that increase in the mean
density of the gas between the SMS forming cloud and the source galaxy protects
the gas cloud from ionizing radiation as they approach each other. Thus, we
conclude that ionizing radiation does not prevent the formation of an SMS in
most of the cases.},
added-at = {2016-11-29T09:54:44.000+0100},
author = {Chon, Sunmyon and Latif, Muhammad A.},
biburl = {https://www.bibsonomy.org/bibtex/2de1258f1ef8210752c7bc2b15075c5a9/miki},
description = {[1611.08594] The impact of ionizing radiation on the formation of a supermassive star in the early Universe},
interhash = {14f28b4a0c124449fe332a496968dde7},
intrahash = {de1258f1ef8210752c7bc2b15075c5a9},
keywords = {formation ionizing massive radiation star},
note = {cite arxiv:1611.08594Comment: 11 pages, 9 figures, to be submitted to MNRAS},
timestamp = {2016-11-29T09:54:44.000+0100},
title = {The impact of ionizing radiation on the formation of a supermassive star
in the early Universe},
url = {http://arxiv.org/abs/1611.08594},
year = 2016
}