We have discovered a 300kpc-wide giant Lya nebula centered on the massive
galaxy group RO-1001 at z=2.91 in the COSMOS field. Keck Cosmic Web Imager
observations reveal three cold gas filaments converging into the center of the
potential well of its ~4x10^13Msun dark matter halo, hosting 1200Msun/yr of
star formation as probed by ALMA and NOEMA observations. The inwards
deceleration of the filament and the prevalence of blueshifted components in
the Lya spectra support a scenario of gas accretion. The upper limits on AGN
activity and overall energetics favor gravity as the primary Lya powering
source and infall as the main source of gas flows to the system. Although
interpretational difficulties remain, with outflows and likely also
recombinations still playing a role, this finding provides arguably an ideal
environment to quantitatively test models of cold gas accretion and galaxy
feeding inside a massive halo at high redshift.
Description
Three Lyman-alpha emitting filaments converging to a massive galaxy group at z=2.91: a case for cold gas infall
%0 Generic
%1 daddi2020three
%A Daddi, E.
%A Valentino, F.
%A Rich, R. M.
%A Neill, J. D.
%A Gronke, M.
%A O'Sullivan, D.
%A Elbaz, D.
%A Bournaud, F.
%A Finoguenov, A.
%A Marchal, A.
%A Delvecchio, I.
%A Jin, S.
%A Liu, D.
%A Calabro, A.
%A Coogan, R.
%A D'Eugenio, C.
%A Gobat, R.
%A Kalita, B. S.
%A Laursen, P.
%A Martin, D. C.
%A Puglisi, A.
%A Schinnerer, E.
%A Strazzullo, V.
%A Wang, T.
%D 2020
%K library
%T Three Lyman-alpha emitting filaments converging to a massive galaxy
group at z=2.91: a case for cold gas infall
%U http://arxiv.org/abs/2006.11089
%X We have discovered a 300kpc-wide giant Lya nebula centered on the massive
galaxy group RO-1001 at z=2.91 in the COSMOS field. Keck Cosmic Web Imager
observations reveal three cold gas filaments converging into the center of the
potential well of its ~4x10^13Msun dark matter halo, hosting 1200Msun/yr of
star formation as probed by ALMA and NOEMA observations. The inwards
deceleration of the filament and the prevalence of blueshifted components in
the Lya spectra support a scenario of gas accretion. The upper limits on AGN
activity and overall energetics favor gravity as the primary Lya powering
source and infall as the main source of gas flows to the system. Although
interpretational difficulties remain, with outflows and likely also
recombinations still playing a role, this finding provides arguably an ideal
environment to quantitatively test models of cold gas accretion and galaxy
feeding inside a massive halo at high redshift.
@misc{daddi2020three,
abstract = {We have discovered a 300kpc-wide giant Lya nebula centered on the massive
galaxy group RO-1001 at z=2.91 in the COSMOS field. Keck Cosmic Web Imager
observations reveal three cold gas filaments converging into the center of the
potential well of its ~4x10^{13}Msun dark matter halo, hosting 1200Msun/yr of
star formation as probed by ALMA and NOEMA observations. The inwards
deceleration of the filament and the prevalence of blueshifted components in
the Lya spectra support a scenario of gas accretion. The upper limits on AGN
activity and overall energetics favor gravity as the primary Lya powering
source and infall as the main source of gas flows to the system. Although
interpretational difficulties remain, with outflows and likely also
recombinations still playing a role, this finding provides arguably an ideal
environment to quantitatively test models of cold gas accretion and galaxy
feeding inside a massive halo at high redshift.},
added-at = {2020-06-22T08:22:05.000+0200},
author = {Daddi, E. and Valentino, F. and Rich, R. M. and Neill, J. D. and Gronke, M. and O'Sullivan, D. and Elbaz, D. and Bournaud, F. and Finoguenov, A. and Marchal, A. and Delvecchio, I. and Jin, S. and Liu, D. and Calabro, A. and Coogan, R. and D'Eugenio, C. and Gobat, R. and Kalita, B. S. and Laursen, P. and Martin, D. C. and Puglisi, A. and Schinnerer, E. and Strazzullo, V. and Wang, T.},
biburl = {https://www.bibsonomy.org/bibtex/2c44902023ba8d5190a1cf3d3ff7bf16e/gpkulkarni},
description = {Three Lyman-alpha emitting filaments converging to a massive galaxy group at z=2.91: a case for cold gas infall},
interhash = {c7243779dc361c4795251c5b902955a8},
intrahash = {c44902023ba8d5190a1cf3d3ff7bf16e},
keywords = {library},
note = {cite arxiv:2006.11089Comment: 17 pages, 11 figures, 2 tables. Submitted to A&A. Comments welcome},
timestamp = {2020-06-22T08:22:05.000+0200},
title = {Three Lyman-alpha emitting filaments converging to a massive galaxy
group at z=2.91: a case for cold gas infall},
url = {http://arxiv.org/abs/2006.11089},
year = 2020
}