Trends among Flux, Luminosity, and Color Indices in High Redshift QSOs

Molecular Gas in High Redshift Qsos

We review cm and mm observations of thermal molecular line emission from high redshift QSOs. These observations reveal the massive gas reservoirs (1010 to 1011 M⊙) required to fuel star formation at high rates. We discuss evidence for active star formation in QSO host galaxies, and we show that these high redshift, FIR-luminous QSOs follow the non-linear trend of increasing LF IR/L (CO) with in...

Dust Emission from High-Redshift QSOs.

We present detections of emission at 250 GHz (1.2 mm) from two high-redshift QSOs from the Sloan Digital Sky Survey sample using the bolometer array at the IRAM 30 m telescope. The sources are SDSSp 015048.83+004126.2 at z=3.7 and SDSSp J033829.31+002156.3 at z=5.0; the latter is the third highest redshift QSO known and the highest redshift millimeter-emitting source yet identified. We also pre...

2 Black Hole Demographics : High Redshift QSOs

The Environments of High Redshift QSOs

We present a sample of i-dropout candidates identified in five Hubble Advanced Camera for Surveys fields centered on Sloan Digital Sky Surveys QSOs at redshift z ∼ 6. Our fields are as deep as the Great Observatory Origins Deep Survey (GOODS) ACS images which are used as a reference field sample. The galaxies are color-selected. We find them to be overdense in two fields, underdense in two fiel...

SPITZER OBSERVATIONS OF HIGH-REDSHIFT QSOs

We have observed 13 QSOs using the Multiband Imaging Photometer for Spitzer, nine of which were z ≥ 4.5 also observed with the Infrared Array Camera. The observations probe rest wavelengths ∼0.6–4.3 mm, bracketing the local minimum in QSO spectral energy distributions (SEDs) between strong optical emission associated directly with accretion processes and thermal emission from hot dust heated by...