%0 Generic %1 greene2014infrared %A Greene, Jenny E %A Alexandroff, Rachael %A Strauss, Michael A %A Zakamska, Nadia L %A Lang, Dustin %A Liu, Guilin %A Pattarakijwanich, Petchara %A Hamann, Frederick %A Ross, Nicholas P %A Myers, Adam D %A Brandt, W Niel %A York, Donald %A Schneider, Donald P %D 2014 %K obscured quasar %T Near Infrared Spectra and Intrinsic Luminosities of Candidate Type II Quasars at 2 < z < 3.4 %U http://arxiv.org/abs/1404.3760 %X We present JHK near-infrared (NIR) spectroscopy of 25 candidate Type II quasars selected from the Sloan Digital Sky Survey, using Triplespec on the Apache Point Observatory 3.5m telescope, FIRE at the Magellan/Baade 6.5m telescope, and GNIRS on Gemini. At redshifts of 2 < z < 3.4, our NIR spectra probe the rest-frame optical region of these targets, which were initially selected to have strong lines of CIV and Ly alpha, with FWHM<2000 km/s from the SDSS pipeline. We use the OIII5007 line shape as a model for the narrow line region emission, and find that \halpha\ consistently requires a broad component with FWHMs ranging from 1000 to 7500 km/s. Interestingly, the CIV lines also require broad bases, but with considerably narrower widths of 1000 to 4500 km/s. Estimating the extinction using the Balmer decrement and also the relationship in lower-z quasars between rest equivalent width and luminosity in the OIII line, we find typical A_V values of 0-2 mag, which naturally explain the attenuated CIV lines relative to Halpha. We propose that our targets are moderately obscured quasars. We also describe one unusual object with three distinct velocity peaks in its OIII spectrum.

@misc{greene2014infrared, abstract = {We present JHK near-infrared (NIR) spectroscopy of 25 candidate Type II quasars selected from the Sloan Digital Sky Survey, using Triplespec on the Apache Point Observatory 3.5m telescope, FIRE at the Magellan/Baade 6.5m telescope, and GNIRS on Gemini. At redshifts of 2 < z < 3.4, our NIR spectra probe the rest-frame optical region of these targets, which were initially selected to have strong lines of CIV and Ly alpha, with FWHM<2000 km/s from the SDSS pipeline. We use the [OIII]5007 line shape as a model for the narrow line region emission, and find that \halpha\ consistently requires a broad component with FWHMs ranging from 1000 to 7500 km/s. Interestingly, the CIV lines also require broad bases, but with considerably narrower widths of 1000 to 4500 km/s. Estimating the extinction using the Balmer decrement and also the relationship in lower-z quasars between rest equivalent width and luminosity in the [OIII] line, we find typical A_V values of 0-2 mag, which naturally explain the attenuated CIV lines relative to Halpha. We propose that our targets are moderately obscured quasars. We also describe one unusual object with three distinct velocity peaks in its [OIII] spectrum.}, added-at = {2014-04-16T09:29:57.000+0200}, author = {Greene, Jenny E and Alexandroff, Rachael and Strauss, Michael A and Zakamska, Nadia L and Lang, Dustin and Liu, Guilin and Pattarakijwanich, Petchara and Hamann, Frederick and Ross, Nicholas P and Myers, Adam D and Brandt, W Niel and York, Donald and Schneider, Donald P}, biburl = {https://www.bibsonomy.org/bibtex/2e99a0efdb2175d7754c4aad2d89f8782/miki}, description = {[1404.3760] Near Infrared Spectra and Intrinsic Luminosities of Candidate Type II Quasars at 2 &lt; z &lt; 3.4}, interhash = {b8b5f0146912be3abfba8299d5d4370d}, intrahash = {e99a0efdb2175d7754c4aad2d89f8782}, keywords = {obscured quasar}, note = {cite arxiv:1404.3760Comment: Accepted for publication in ApJ, 18 pages, 14 figures}, timestamp = {2014-04-16T09:29:57.000+0200}, title = {Near Infrared Spectra and Intrinsic Luminosities of Candidate Type II Quasars at 2 < z < 3.4}, url = {http://arxiv.org/abs/1404.3760}, year = 2014 }