%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 }