Galaxy formation models and simulations rely on various feedback mechanisms
to reproduce the observed baryonic scaling relations and galaxy morphologies.
Although dwarf galaxy and giant elliptical properties can be explained using
feedback from supernova and active galactic nuclei, Milky Way-sized galaxies
still represent a challenge to current theories of galaxy formation. In this
paper, we explore the possible role of feedback from stellar radiation in
regulating the main properties of disk galaxies such as our own Milky Way. We
have performed a suite of cosmological simulations of the same $\sim10^12
M_ødot$ halo selected based on its rather typical mass accretion
history. We have implemented radiative feedback from young stars using a crude
model of radiative transfer for ultraviolet (UV) and infrared (IR) radiation.
However, the model is realistic enough such that the dust opacity plays a
direct role in regulating the efficiency of our feedback mechanism. We have
explored various models for the dust opacity, assuming different constant dust
temperatures, as well as a varying dust temperature model. We find that while
strong radiative feedback appears as a viable mechanism to regulate the stellar
mass fraction in massive galaxies, it also prevents the formation of discs with
reasonable morphologies. In models with strong stellar radiation feedback,
stellar discs are systematically too thick while the gas disc morphology is
completely destroyed due to the efficient mixing between the feedback-affected
gas and its surroundings. At the resolution of our simulation suite, we find it
impossible to preserve spiral disc morphology while at the same time expelling
enough baryons to satisfy the abundance matching constraints.
Description
[1308.6321] A Systematic Look at the Effects of Radiative Feedback on Disc Galaxy Formation
%0 Generic
%1 roskar2013systematic
%A Roškar, Rok
%A Teyssier, Romain
%A Agertz, Oscar
%A Wetzstein, Markus
%A Moore, Ben
%D 2013
%K feedback galaxy milkyway radiative
%T A Systematic Look at the Effects of Radiative Feedback on Disc Galaxy
Formation
%U http://arxiv.org/abs/1308.6321
%X Galaxy formation models and simulations rely on various feedback mechanisms
to reproduce the observed baryonic scaling relations and galaxy morphologies.
Although dwarf galaxy and giant elliptical properties can be explained using
feedback from supernova and active galactic nuclei, Milky Way-sized galaxies
still represent a challenge to current theories of galaxy formation. In this
paper, we explore the possible role of feedback from stellar radiation in
regulating the main properties of disk galaxies such as our own Milky Way. We
have performed a suite of cosmological simulations of the same $\sim10^12
M_ødot$ halo selected based on its rather typical mass accretion
history. We have implemented radiative feedback from young stars using a crude
model of radiative transfer for ultraviolet (UV) and infrared (IR) radiation.
However, the model is realistic enough such that the dust opacity plays a
direct role in regulating the efficiency of our feedback mechanism. We have
explored various models for the dust opacity, assuming different constant dust
temperatures, as well as a varying dust temperature model. We find that while
strong radiative feedback appears as a viable mechanism to regulate the stellar
mass fraction in massive galaxies, it also prevents the formation of discs with
reasonable morphologies. In models with strong stellar radiation feedback,
stellar discs are systematically too thick while the gas disc morphology is
completely destroyed due to the efficient mixing between the feedback-affected
gas and its surroundings. At the resolution of our simulation suite, we find it
impossible to preserve spiral disc morphology while at the same time expelling
enough baryons to satisfy the abundance matching constraints.
@misc{roskar2013systematic,
abstract = {Galaxy formation models and simulations rely on various feedback mechanisms
to reproduce the observed baryonic scaling relations and galaxy morphologies.
Although dwarf galaxy and giant elliptical properties can be explained using
feedback from supernova and active galactic nuclei, Milky Way-sized galaxies
still represent a challenge to current theories of galaxy formation. In this
paper, we explore the possible role of feedback from stellar radiation in
regulating the main properties of disk galaxies such as our own Milky Way. We
have performed a suite of cosmological simulations of the same $\sim10^{12}
{\rm M}_{\odot}$ halo selected based on its rather typical mass accretion
history. We have implemented radiative feedback from young stars using a crude
model of radiative transfer for ultraviolet (UV) and infrared (IR) radiation.
However, the model is realistic enough such that the dust opacity plays a
direct role in regulating the efficiency of our feedback mechanism. We have
explored various models for the dust opacity, assuming different constant dust
temperatures, as well as a varying dust temperature model. We find that while
strong radiative feedback appears as a viable mechanism to regulate the stellar
mass fraction in massive galaxies, it also prevents the formation of discs with
reasonable morphologies. In models with strong stellar radiation feedback,
stellar discs are systematically too thick while the gas disc morphology is
completely destroyed due to the efficient mixing between the feedback-affected
gas and its surroundings. At the resolution of our simulation suite, we find it
impossible to preserve spiral disc morphology while at the same time expelling
enough baryons to satisfy the abundance matching constraints.},
added-at = {2013-08-30T16:55:14.000+0200},
author = {Roškar, Rok and Teyssier, Romain and Agertz, Oscar and Wetzstein, Markus and Moore, Ben},
biburl = {https://www.bibsonomy.org/bibtex/217f94a696a6bfbe32c758dffb477c42d/miki},
description = {[1308.6321] A Systematic Look at the Effects of Radiative Feedback on Disc Galaxy Formation},
interhash = {9ede91485e3e7cb79ba8f78fc1c8581a},
intrahash = {17f94a696a6bfbe32c758dffb477c42d},
keywords = {feedback galaxy milkyway radiative},
note = {cite arxiv:1308.6321Comment: submitted to MNRAS; comments welcome},
timestamp = {2013-08-30T16:55:14.000+0200},
title = {A Systematic Look at the Effects of Radiative Feedback on Disc Galaxy
Formation},
url = {http://arxiv.org/abs/1308.6321},
year = 2013
}