We present spatially resolved spectropolarimetic measurements of the 100-kpc
scale gaseous environment of the z=2.34 radio galaxy TXS 0211-122. The
polarization level of the narrow Ly-alpha emission is low centrally (P<5 %),
but rises to P=16.4+/-4.6 % in the Eastern part of the nebula, indicating that
the nebula is at least partly powered by the scattering of Ly-alpha photons by
HI. Not only is this the first detection of polarized Ly-alpha around a
radio-loud active galaxy, it is also the second detection to date for any kind
of Ly-alpha nebula. We also detect a pair of diametrically opposed UV continuum
sources along the slit, at the outer edges of the Ly-alpha nebula, which we
suggest may be the limb of a dusty shell, related to the large-scale HI
absorbers often associated with high-z radio galaxies.
Описание
[1302.2813] Polarized extended Ly-alpha emission from a z=2.3 radio galaxy
%0 Generic
%1 humphrey2013polarized
%A Humphrey, A.
%A Vernet, J.
%A Villar-Martin, M.
%A Alighieri, S. di Serego
%A Fosbury, R. A. E.
%A Cimatti, A.
%D 2013
%K lya polarization scatter
%T Polarized extended Ly-alpha emission from a z=2.3 radio galaxy
%U http://arxiv.org/abs/1302.2813
%X We present spatially resolved spectropolarimetic measurements of the 100-kpc
scale gaseous environment of the z=2.34 radio galaxy TXS 0211-122. The
polarization level of the narrow Ly-alpha emission is low centrally (P<5 %),
but rises to P=16.4+/-4.6 % in the Eastern part of the nebula, indicating that
the nebula is at least partly powered by the scattering of Ly-alpha photons by
HI. Not only is this the first detection of polarized Ly-alpha around a
radio-loud active galaxy, it is also the second detection to date for any kind
of Ly-alpha nebula. We also detect a pair of diametrically opposed UV continuum
sources along the slit, at the outer edges of the Ly-alpha nebula, which we
suggest may be the limb of a dusty shell, related to the large-scale HI
absorbers often associated with high-z radio galaxies.
@misc{humphrey2013polarized,
abstract = {We present spatially resolved spectropolarimetic measurements of the 100-kpc
scale gaseous environment of the z=2.34 radio galaxy TXS 0211-122. The
polarization level of the narrow Ly-alpha emission is low centrally (P<5 %),
but rises to P=16.4+/-4.6 % in the Eastern part of the nebula, indicating that
the nebula is at least partly powered by the scattering of Ly-alpha photons by
HI. Not only is this the first detection of polarized Ly-alpha around a
radio-loud active galaxy, it is also the second detection to date for any kind
of Ly-alpha nebula. We also detect a pair of diametrically opposed UV continuum
sources along the slit, at the outer edges of the Ly-alpha nebula, which we
suggest may be the limb of a dusty shell, related to the large-scale HI
absorbers often associated with high-z radio galaxies.},
added-at = {2013-02-13T16:40:55.000+0100},
author = {Humphrey, A. and Vernet, J. and Villar-Martin, M. and Alighieri, S. di Serego and Fosbury, R. A. E. and Cimatti, A.},
biburl = {https://www.bibsonomy.org/bibtex/2f1798bfa008aefb94c08b00d152c3e08/miki},
description = {[1302.2813] Polarized extended Ly-alpha emission from a z=2.3 radio galaxy},
interhash = {8d29095cdd18bc9290c301260fd4a423},
intrahash = {f1798bfa008aefb94c08b00d152c3e08},
keywords = {lya polarization scatter},
note = {cite arxiv:1302.2813Comment: Accepted for publication in Astrophysical Journal Letters},
timestamp = {2013-02-13T16:40:55.000+0100},
title = {Polarized extended Ly-alpha emission from a z=2.3 radio galaxy},
url = {http://arxiv.org/abs/1302.2813},
year = 2013
}