We present Karl G. Jansky Very Large Array (VLA) observations of 44 GHz
continuum and CO J=2-1 line emission in BR1202-0725 at z=4.7 (a starburst
galaxy and quasar pair) and BRI1335-0417 at z=4.4 (also hosting a quasar). With
the full 8 GHz bandwidth capabilities of the upgraded VLA, we study the
(rest-frame) 250 GHz thermal dust continuum emission for the first time along
with the cold molecular gas traced by the Low-J CO line emission. The measured
CO J=2-1 line luminosities of BR1202-0725 are L'(CO) = (8.7+/-0.8)x10^10 K km/s
pc^2 and L'(CO) = (6.0+/-0.5)x10^10 K km/s pc^2 for the submm galaxy (SMG) and
quasar, which are equal to previous measurements of the CO J=5-4 line
luminosities implying thermalized line emission and we estimate a combined cold
molecular gas mass of ~9x10^10 Msun. In BRI1335-0417 we measure L'(CO) =
(7.3+/-0.6)x10^10 K km/s pc^2. We detect continuum emission in the SMG
BR1202-0725 North (S(44GHz) = 51+/-6 microJy), while the quasar is detected
with S(44GHz) = 24+/-6 microJy and in BRI1335-0417 we measure S(44GHz) = 40+/-7
microJy. Combining our continuum observations with previous data at
(rest-frame) far-infrared and cm-wavelengths, we fit three component models in
order to estimate the star-formation rates. This spectral energy distribution
fitting suggests that the dominant contribution to the observed 44~GHz
continuum is thermal dust emission, while either thermal free-free or
synchrotron emission contributes less than 30%.
Description
[1401.1213] Karl G. Jansky Very Large Array observations of cold dust and molecular gas in starbursting quasar host galaxies at z~4.5
%0 Generic
%1 wagg2014jansky
%A Wagg, J.
%A Carilli, C. L.
%A Aravena, M.
%A Cox, P.
%A Lentati, L.
%A Maiolino, R.
%A McMahon, R. G.
%A Riechers, D.
%A Walter, F.
%A Andreani, P.
%A Hills, R.
%A Wolfe, A.
%D 2014
%K galaxy gas host molecular quasar starburst
%T Karl G. Jansky Very Large Array observations of cold dust and molecular
gas in starbursting quasar host galaxies at z~4.5
%U http://arxiv.org/abs/1401.1213
%X We present Karl G. Jansky Very Large Array (VLA) observations of 44 GHz
continuum and CO J=2-1 line emission in BR1202-0725 at z=4.7 (a starburst
galaxy and quasar pair) and BRI1335-0417 at z=4.4 (also hosting a quasar). With
the full 8 GHz bandwidth capabilities of the upgraded VLA, we study the
(rest-frame) 250 GHz thermal dust continuum emission for the first time along
with the cold molecular gas traced by the Low-J CO line emission. The measured
CO J=2-1 line luminosities of BR1202-0725 are L'(CO) = (8.7+/-0.8)x10^10 K km/s
pc^2 and L'(CO) = (6.0+/-0.5)x10^10 K km/s pc^2 for the submm galaxy (SMG) and
quasar, which are equal to previous measurements of the CO J=5-4 line
luminosities implying thermalized line emission and we estimate a combined cold
molecular gas mass of ~9x10^10 Msun. In BRI1335-0417 we measure L'(CO) =
(7.3+/-0.6)x10^10 K km/s pc^2. We detect continuum emission in the SMG
BR1202-0725 North (S(44GHz) = 51+/-6 microJy), while the quasar is detected
with S(44GHz) = 24+/-6 microJy and in BRI1335-0417 we measure S(44GHz) = 40+/-7
microJy. Combining our continuum observations with previous data at
(rest-frame) far-infrared and cm-wavelengths, we fit three component models in
order to estimate the star-formation rates. This spectral energy distribution
fitting suggests that the dominant contribution to the observed 44~GHz
continuum is thermal dust emission, while either thermal free-free or
synchrotron emission contributes less than 30%.
@misc{wagg2014jansky,
abstract = {We present Karl G. Jansky Very Large Array (VLA) observations of 44 GHz
continuum and CO J=2-1 line emission in BR1202-0725 at z=4.7 (a starburst
galaxy and quasar pair) and BRI1335-0417 at z=4.4 (also hosting a quasar). With
the full 8 GHz bandwidth capabilities of the upgraded VLA, we study the
(rest-frame) 250 GHz thermal dust continuum emission for the first time along
with the cold molecular gas traced by the Low-J CO line emission. The measured
CO J=2-1 line luminosities of BR1202-0725 are L'(CO) = (8.7+/-0.8)x10^10 K km/s
pc^2 and L'(CO) = (6.0+/-0.5)x10^10 K km/s pc^2 for the submm galaxy (SMG) and
quasar, which are equal to previous measurements of the CO J=5-4 line
luminosities implying thermalized line emission and we estimate a combined cold
molecular gas mass of ~9x10^10 Msun. In BRI1335-0417 we measure L'(CO) =
(7.3+/-0.6)x10^10 K km/s pc^2. We detect continuum emission in the SMG
BR1202-0725 North (S(44GHz) = 51+/-6 microJy), while the quasar is detected
with S(44GHz) = 24+/-6 microJy and in BRI1335-0417 we measure S(44GHz) = 40+/-7
microJy. Combining our continuum observations with previous data at
(rest-frame) far-infrared and cm-wavelengths, we fit three component models in
order to estimate the star-formation rates. This spectral energy distribution
fitting suggests that the dominant contribution to the observed 44~GHz
continuum is thermal dust emission, while either thermal free-free or
synchrotron emission contributes less than 30%.},
added-at = {2014-01-08T10:13:44.000+0100},
author = {Wagg, J. and Carilli, C. L. and Aravena, M. and Cox, P. and Lentati, L. and Maiolino, R. and McMahon, R. G. and Riechers, D. and Walter, F. and Andreani, P. and Hills, R. and Wolfe, A.},
biburl = {https://www.bibsonomy.org/bibtex/24d3d3ba522cd7aa311ce262362617814/miki},
description = {[1401.1213] Karl G. Jansky Very Large Array observations of cold dust and molecular gas in starbursting quasar host galaxies at z~4.5},
interhash = {1ef7b94764ec615238ff6360cbe8f209},
intrahash = {4d3d3ba522cd7aa311ce262362617814},
keywords = {galaxy gas host molecular quasar starburst},
note = {cite arxiv:1401.1213Comment: 16 pages , 4 figures. Accepted for publication in ApJ},
timestamp = {2014-01-08T10:14:07.000+0100},
title = {Karl G. Jansky Very Large Array observations of cold dust and molecular
gas in starbursting quasar host galaxies at z~4.5},
url = {http://arxiv.org/abs/1401.1213},
year = 2014
}