%0 Generic %1 odowd2017intrinsic %A O'Dowd, M. %A Bate, N. F. %A Webster, R. L. %A Labrie, K. %A King, A. L. %A Yong, S-. Y. %D 2017 %K ifu lense proximity region spectroscopy %T The Intrinsic Far-UV Spectrum of B1422+231 %U http://arxiv.org/abs/1708.07535 %X We present new spectroscopy of the z=3.62 gravitationally lensed quasar B1422+117 from the Gemini North GMOS integral field spectrograph. We observe significant differential magnifications between the broad emission lines and the continuum, as well as across the velocity structure of the Lyman-alpha line. We take advantage of this differential microlensing to algebraically decompose the quasar spectrum into the absorbed broad emission line and absorbed continuum components. We use the latter to derive the intrinsic Ly-alpha forest absorption spectrum. The proximity effect is clearly detected, with a proximity zone edge of 8.6--17 Mpc from the quasar, implying (perhaps intermittent) activity over at least 28 Myrs. The Ly-alpha line profile exhibits a blue excess that is inconsistent with a symmetric fit to the unabsorbed red side. This has important implications for the use of this fitting technique in estimating the absorbed blue Ly-alpha wings of Gunn-Peterson trough quasars.

@misc{odowd2017intrinsic, abstract = {We present new spectroscopy of the z=3.62 gravitationally lensed quasar B1422+117 from the Gemini North GMOS integral field spectrograph. We observe significant differential magnifications between the broad emission lines and the continuum, as well as across the velocity structure of the Lyman-alpha line. We take advantage of this differential microlensing to algebraically decompose the quasar spectrum into the absorbed broad emission line and absorbed continuum components. We use the latter to derive the intrinsic Ly-alpha forest absorption spectrum. The proximity effect is clearly detected, with a proximity zone edge of 8.6--17 Mpc from the quasar, implying (perhaps intermittent) activity over at least 28 Myrs. The Ly-alpha line profile exhibits a blue excess that is inconsistent with a symmetric fit to the unabsorbed red side. This has important implications for the use of this fitting technique in estimating the absorbed blue Ly-alpha wings of Gunn-Peterson trough quasars.}, added-at = {2017-08-28T11:44:01.000+0200}, author = {O'Dowd, M. and Bate, N. F. and Webster, R. L. and Labrie, K. and King, A. L. and Yong, S-. Y.}, biburl = {https://www.bibsonomy.org/bibtex/28d26039f8a57f1f8a4c87ad827e64471/miki}, description = {[1708.07535] The Intrinsic Far-UV Spectrum of B1422+231}, interhash = {9b36f4cd77ce2bb719dc5ac1cdb6f1df}, intrahash = {8d26039f8a57f1f8a4c87ad827e64471}, keywords = {ifu lense proximity region spectroscopy}, note = {cite arxiv:1708.07535Comment: 9 pages, 9 figures}, timestamp = {2017-08-28T11:44:01.000+0200}, title = {The Intrinsic Far-UV Spectrum of B1422+231}, url = {http://arxiv.org/abs/1708.07535}, year = 2017 }