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A search for dust and molecular gas in enormous Ly nebulae at
Roberto Decarli, Fabrizio Arrigoni-Battaia, Joseph F. Hennawi +3
Enormous Ly nebulae, extending over 300-500\,kpc around quasars, represent the pinnacle of galaxy and cluster formation. Here we present IRAM Plateau de Bure Interferometer obse…
New Evidence for Extended HeII Reionization at z>3.5 from HeII Lyman Alpha and Beta Transmission Spikes
Kirill Makan, Gábor Worseck, Frederick B. Davies +3
We present new high-resolution (R~14,000) spectra of the two brightest HeII-transparent quasars in the far-UV (FUV) at z>3.5, HE2QSJ2311-1417 (z=3.70) and HE2QSJ1630+0435 (z=3.81),…
Revealing the Accretion Physics of Supermassive Black Holes at Redshift z~7 with Chandra and Infrared Observations
Feige Wang, Xiaohui Fan, Jinyi Yang +14
X-ray emission from quasars has been detected up to redshift , although only limited to a few objects at . In this work, we present new Chandra observations of five $…
Interstellar and Circumgalactic Properties of an Unseen Galaxy: Abundances, Ionization, and Heating in the Earliest Known Quasar Absorber
Robert A. Simcoe, Masafusa Onoue, Anna-Christina Eilers +5
We analyze relative abundances and ionization conditions in a strong absorption system at z=6.84, seen in the spectrum of the z=7.54 background quasar ULAS J134208.10+092838.61. Si…
The X-SHOOTER/ALMA sample of Quasars in the Epoch of Reionization. I. NIR spectral modeling, iron enrichment and broad emission line properties
Jan-Torge Schindler, Emanuele Paolo Farina, Eduardo Banados +15
We present X-SHOOTER near-infrared spectroscopy of a large sample of 38 luminous ( to ) quasars at , which have complementary CII observations f…
The clustering of submillimeter galaxies detected with ALMA
Cristina Garcia-Vergara, Jacqueline Hodge, Joseph F. Hennawi +4
Previous studies measuring the clustering of submillimeter galaxies (SMGs) have based their measurements on single-dish detected sources, finding evidence for strong clustering. Ho…
Measurements of the z ~ 6 Intergalactic Medium Optical Depth and Transmission Spikes Using a New z > 6.3 Quasar Sample
Jinyi Yang, Feige Wang, Xiaohui Fan +9
We report new measurements of the intergalactic medium (IGM) Ly and Ly effective optical depth at , using a new sample of quasar sightlines including 32 quasars at…
The Evolution of the Baryons Associated with Galaxies Averaged over Cosmic Time and Space
Fabian Walter, Chris Carilli, Marcel Neeleman +30
We combine the recent determination of the evolution of the cosmic density of molecular gas (H_2) using deep, volumetric surveys, with previous estimates of the cosmic density of s…
Probing Reionization and Early Cosmic Enrichment with the MgII Forest
Joseph F. Hennawi, Frederick B. Davies, Feige Wang +1
Because the same massive stars that reionized the intergalactic medium (IGM) inevitably exploded as supernovae that polluted the Universe with metals, the history of cosmic reioniz…
Constraining the Gravitational Lensing of Quasars from their Proximity Zones
Frederick B. Davies, Feige Wang, Anna-Christina Eilers +1
Since their discovery twenty years ago, the observed luminosity function of quasars has been suspected to be biased by gravitational lensing. Apart from the recent disc…
No Redshift Evolution in the Broad Line Region Metallicity up to z=7.54: Deep NIR Spectroscopy of ULAS J1342+0928
Masafusa Onoue, Eduardo Bañados, Chiara Mazzucchelli +12
We present deep (9 hours) Gemini-N/GNIRS near-infrared spectroscopic observations of ULAS J1342+0928, a luminous quasar at z=7.54. Various broad emission lines were detected, as we…
Pōniuā'ena: A Luminous Quasar Hosting a 1.5 Billion Solar Mass Black Hole
Jinyi Yang, Feige Wang, Xiaohui Fan +16
We report the discovery of a luminous quasar, J1007+2115 at ("Pōniuā'ena"), from our wide-field reionization-era quasar survey. J1007+2115 is the second quasar now known…
PypeIt: The Python Spectroscopic Data Reduction Pipeline
J. Xavier Prochaska, Joseph F. Hennawi, Kyle B. Westfall +5
PypeIt is a Python package for semi-automated reduction of astronomical, spectroscopic data. Its algorithms build on decades-long development of previous data reduction pipelines b…
Circumgalactic Mg II Emission from an Isotropic Starburst Galaxy Outflow Mapped by KCWI
Joseph N. Burchett, Kate H. R. Rubin, J. Xavier Prochaska +3
We present spatially-resolved spectroscopy from the Keck Cosmic Web Imager (KCWI) of a star-forming galaxy at z=0.6942, which shows emission from the Mg II 2796, 2803 Angstrom doub…
A Significantly Neutral Intergalactic Medium Around the Luminous z=7 Quasar J0252-0503
Feige Wang, Frederick B. Davies, Jinyi Yang +14
Luminous quasars provide direct probes of the evolution of supermassive black holes (SMBHs) and the intergalactic medium (IGM) during the epoch of reionization (EoR). The L…
Detecting and Characterizing Young Quasars I: Systemic Redshifts and Proximity Zones Measurements
Anna-Christina Eilers, Joseph F. Hennawi, Roberto Decarli +12
In a multi-wavelength survey of quasars at , that were pre-selected to be potentially young, we find five objects with extremely small proximity zone…