Probing the gaseous halo of galaxies through non-thermal emission from
AGN-driven outflows
X. Wang, and A. Loeb. (2015)cite arxiv:1506.05470Comment: 12 pages, 7 figures, 1 table, submitted to MNRAS.
Abstract
Feedback from outflows driven by active galactic nuclei (AGN) can affect the
distribution and properties of the gaseous halos of galaxies. We study the
hydrodynamics and non-thermal emission from the forward outflow shock produced
by an AGN-driven outflow. We consider a few possible profiles for the halo gas
density, self-consistently constrained by the halo mass, redshift and the disk
baryonic concentration of the galaxy. We show that the outflow velocity levels
off at $10^3\,km\, s^-1$ within the scale of the galaxy disk.
Typically, the outflow can reach the virial radius around the time when the AGN
shuts off. We show that the outflows are energy-driven, consistently with
observations. The outflow shock lights up the halos of massive galaxies across
a broad wavelength range. For Milky Way (MW) mass halos, radio observations by
The Jansky Very Large Array (JVLA) and The Square Kilometer Array (SKA) and
infrared/optical observations by The James Webb Space Telescope (JWST) and
Hubble Space Telescope (HST) can detect the emission signal of angular size
$8"$ from galaxies out to redshift $z\sim5$. Millimeter observations by
The Atacama Large Millimeter/submillimeter Array (ALMA) are sensitive to
non-thermal emission of angular size $18"$ from galaxies at redshift
$złesssim1$, while X-ray observations by Chandra, XMM-Newton and The Advanced
Telescope for High Energy Astrophysics (ATHENA) is limited to local galaxies
($z0.1$) with an emission angular size of $\sim2'$. Overall, the
extended non-thermal emission provides a new way of probing the gaseous halos
of galaxies at high redshifts.
Description
[1506.05470] Probing the gaseous halo of galaxies through non-thermal emission from AGN-driven outflows
%0 Generic
%1 wang2015probing
%A Wang, Xiawei
%A Loeb, Abraham
%D 2015
%K emission gas halo non thermal
%T Probing the gaseous halo of galaxies through non-thermal emission from
AGN-driven outflows
%U http://arxiv.org/abs/1506.05470
%X Feedback from outflows driven by active galactic nuclei (AGN) can affect the
distribution and properties of the gaseous halos of galaxies. We study the
hydrodynamics and non-thermal emission from the forward outflow shock produced
by an AGN-driven outflow. We consider a few possible profiles for the halo gas
density, self-consistently constrained by the halo mass, redshift and the disk
baryonic concentration of the galaxy. We show that the outflow velocity levels
off at $10^3\,km\, s^-1$ within the scale of the galaxy disk.
Typically, the outflow can reach the virial radius around the time when the AGN
shuts off. We show that the outflows are energy-driven, consistently with
observations. The outflow shock lights up the halos of massive galaxies across
a broad wavelength range. For Milky Way (MW) mass halos, radio observations by
The Jansky Very Large Array (JVLA) and The Square Kilometer Array (SKA) and
infrared/optical observations by The James Webb Space Telescope (JWST) and
Hubble Space Telescope (HST) can detect the emission signal of angular size
$8"$ from galaxies out to redshift $z\sim5$. Millimeter observations by
The Atacama Large Millimeter/submillimeter Array (ALMA) are sensitive to
non-thermal emission of angular size $18"$ from galaxies at redshift
$złesssim1$, while X-ray observations by Chandra, XMM-Newton and The Advanced
Telescope for High Energy Astrophysics (ATHENA) is limited to local galaxies
($z0.1$) with an emission angular size of $\sim2'$. Overall, the
extended non-thermal emission provides a new way of probing the gaseous halos
of galaxies at high redshifts.
@misc{wang2015probing,
abstract = {Feedback from outflows driven by active galactic nuclei (AGN) can affect the
distribution and properties of the gaseous halos of galaxies. We study the
hydrodynamics and non-thermal emission from the forward outflow shock produced
by an AGN-driven outflow. We consider a few possible profiles for the halo gas
density, self-consistently constrained by the halo mass, redshift and the disk
baryonic concentration of the galaxy. We show that the outflow velocity levels
off at $\sim 10^3\,\rm km\, s^{-1}$ within the scale of the galaxy disk.
Typically, the outflow can reach the virial radius around the time when the AGN
shuts off. We show that the outflows are energy-driven, consistently with
observations. The outflow shock lights up the halos of massive galaxies across
a broad wavelength range. For Milky Way (MW) mass halos, radio observations by
The Jansky Very Large Array (JVLA) and The Square Kilometer Array (SKA) and
infrared/optical observations by The James Webb Space Telescope (JWST) and
Hubble Space Telescope (HST) can detect the emission signal of angular size
$\sim 8"$ from galaxies out to redshift $z\sim5$. Millimeter observations by
The Atacama Large Millimeter/submillimeter Array (ALMA) are sensitive to
non-thermal emission of angular size $\sim 18"$ from galaxies at redshift
$z\lesssim1$, while X-ray observations by Chandra, XMM-Newton and The Advanced
Telescope for High Energy Astrophysics (ATHENA) is limited to local galaxies
($z\lesssim 0.1$) with an emission angular size of $\sim2'$. Overall, the
extended non-thermal emission provides a new way of probing the gaseous halos
of galaxies at high redshifts.},
added-at = {2015-06-19T09:36:36.000+0200},
author = {Wang, Xiawei and Loeb, Abraham},
biburl = {https://www.bibsonomy.org/bibtex/285aa123608bb4c3eab114adf57e934ee/miki},
description = {[1506.05470] Probing the gaseous halo of galaxies through non-thermal emission from AGN-driven outflows},
interhash = {56dd091c2e7a25d8e0811664c72b2487},
intrahash = {85aa123608bb4c3eab114adf57e934ee},
keywords = {emission gas halo non thermal},
note = {cite arxiv:1506.05470Comment: 12 pages, 7 figures, 1 table, submitted to MNRAS},
timestamp = {2015-06-19T09:36:36.000+0200},
title = {Probing the gaseous halo of galaxies through non-thermal emission from
AGN-driven outflows},
url = {http://arxiv.org/abs/1506.05470},
year = 2015
}