Cosmic Evolution of Star Formation in Type-1 Quasar Hosts Since z = 1 (2009)
Shi, Yong, Rieke, George H., Ogle , Patrick, Jiang, Linhua, Diamond-Stanic, Aleksandar M.
We present Spitzer Infrared Spectrograph observations of a complete sample of 57 Sloan Digital Sky Survey type-1 quasars at z ~ 1. Aromatic features at 6.2 and/or 7.7 μm are detected in about half...
Cosmic Evolution of Star Formation In SDSS Quasar Hosts Since z=1 (2009)
Shi, Yong, Rieke, George H., Ogle, Patrick, Jiang, Linhua, Diamond-Stanic, Aleksandar M.
We present Spitzer IRS observations of a complete sample of 57 SDSS type-1 quasars at z~1. Aromatic features at 6.2 and/or 7.7 um are detected in about half of the sample and show profiles similar to...
High-Redshift SDSS Quasars with Weak Emission Lines (2009)
Diamond-Stanic, Aleksandar M., Fan, Xiaohui, Brandt, W. N., Shemmer, Ohad, Strauss, Michael A., Anderson, Scott F., ...
We identify a sample of 74 high-redshift quasars (z>3) with weak emission lines from the Fifth Data Release of the Sloan Digital Sky Survey and present infrared, optical, and radio observations of a...
Isotropic Luminosity Indicators in a Complete AGN Sample (2009)
Diamond-Stanic, Aleksandar M., Rieke, George H., Rigby, Jane R.
The [O IV] 25.89 micron line has been shown to be an accurate indicator of active galactic nucleus (AGN) intrinsic luminosity in that it correlates well with hard (10-200 keV) X-ray emission. We...
X-ray Insights into the Nature of Weak Emission-Line Quasars at High Redshift (2009)
Shemmer, Ohad, Brandt, W. N., Anderson, Scott F., Diamond-Stanic, Aleksandar M., Fan, Xiaohui, Richards, Gordon T., ...
We present Chandra observations of nine high-redshift quasars (z=2.7-5.9) discovered by the Sloan Digital Sky Survey with weak or undetectable high-ionization emission lines in their UV spectra...
The Discovery of 1000 km/s Outflows in Massive Post-starburst Galaxies at z=0.6 (2007)
Tremonti, Christy A., Moustakas, John, Diamond-Stanic, Aleksandar M.
Numerical simulations suggest that active galactic nuclei (AGNs) play an important role in the formation of early-type galaxies by expelling gas and dust in powerful galactic winds and quenching star...
Highly Polarized Optically-Selected BL Lacertae Objects (2007)
Smith, Paul S., Williams, G. Grant, Schmidt, Gary D., Diamond-Stanic, Aleksandar M., Means, Dennis L.
Observations of candidate BL Lacertae objects spectroscopically selected from the Sloan Digital Sky Survey (SDSS) reveal a large fraction with high polarization (P > 3%). This result confirms that...
Chandra Observations of the Highest Redshift Quasars from the Sloan Digital Sky Survey (2006)
Shemmer, Ohad, Brandt, W. N., Schneider, Donald P., Fan, Xiaohui, Strauss, Michael A., Diamond-Stanic, Aleksandar M., ...
We present new Chandra observations of 21 z>4 quasars, including 11 sources at z>5. These observations double the number of X-ray detected quasars at z>5, allowing investigation of the X-ray spectral...
Fan, Xiaohui, Strauss, Michael A., Richards, Gordon T., Hennawi, Joseph F., Becker, Robert H., White, Richard L., ...
Fan, Xiaohui, Strauss, Michael A., Richards, Gordon T., Hennawi, Joseph F., Becker, Robert H., White, Richard L., ...
We present the discovery of seven quasars at z>5.7, selected from ~2000 deg^2 of multicolor imaging data of the Sloan Digital Sky Survey (SDSS). The new quasars have redshifts z from 5.79 to 6.13....