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(Nearly) Model-Independent Constraints on the Neutral Hydrogen Fraction in the Intergalactic Medium at Using Dark Pixel Fractions in Ly and Ly Forests
Xiangyu Jin, Jinyi Yang, Xiaohui Fan +10
Cosmic reionization was the last major phase transition of hydrogen from neutral to highly ionized in the intergalactic medium (IGM). Current observations show that the IGM is sign…
The XQR-30 Metal Absorber Catalog: 778 Absorption Systems Spanning 2 < z < 6.5
Rebecca L. Davies, Emma Ryan-Weber, Valentina D'Odorico +11
Intervening metal absorption lines in the spectra of z > 6 quasars are fundamental probes of the ionization state and chemical composition of circumgalactic and intergalactic gas n…
Detection of stellar light from quasar host galaxies at redshifts above 6
Xuheng Ding, Masafusa Onoue, John D. Silverman +41
The detection of starlight from the host galaxies of quasars during the reionization epoch () has been elusive, even with deep HST observations. The current highest redshift q…
The Identification of a Dusty Multiarm Spiral Galaxy at with JWST and ALMA
Yunjing Wu, Zheng Cai, Fengwu Sun +13
Spiral arms serve crucial purposes in star formation and galaxy evolution. In this paper, we report the identification of A2744-DSG-, a dusty, multiarm spiral galaxy at $z=3.05…
The X-shooter/ALMA Sample of Quasars in the Epoch of Reionization. II. Black Hole Masses, Eddington Ratios, and the Formation of the First Quasars
Emanuele Paolo Farina, Jan-Torge Schindler, Fabian Walter +20
We present measurements of black hole masses and Eddington ratios for a sample of 38 bright (M < -24.4 mag) quasars at 5.8 < z < 7.5, derived from VLT/X-shooter near-IR sp…
Definitive upper bound on the negligible contribution of quasars to cosmic reionization
Linhua Jiang, Yuanhang Ning, Xiaohui Fan +7
Cosmic (hydrogen) reionization marks one of the major phase transitions of the universe at redshift z >= 6. During this epoch, hydrogen atoms in the intergalactic medium (IGM) were…
ALMA Confirmation of an Obscured Hyperluminous Radio-Loud AGN at Associated with a Dusty Starburst in the 1.5 deg COSMOS Field
Ryan Endsley, Daniel P. Stark, Jianwei Lyu +7
We present band 6 ALMA observations of a heavily-obscured radio-loud ( W Hz) AGN candidate at found in the 1.5…
Long Dark Gaps in the Ly Forest at : Evidence of Ultra Late Reionization from XQR-30 Spectra
Yongda Zhu, George D. Becker, Sarah E. I. Bosman +22
We present a new investigation of the intergalactic medium (IGM) near reionization using dark gaps in the Lyman- (Ly) forest. With its lower optical depth, Ly offers a pot…
Tucana B: A Potentially Isolated and Quenched Ultra-faint Dwarf Galaxy at D1.4 Mpc
D. J. Sand, B. Mutlu-Pakdil, M. G. Jones +7
We report the discovery of Tucana B, an isolated ultra-faint dwarf galaxy at a distance of D=1.4 Mpc. Tucana B was found during a search for ultra-faint satellite companions to the…
The [CII] and FIR properties of z>6 radio-loud quasars
Yana Khusanova, Eduardo Bañados, Chiara Mazzucchelli +9
There are only five radio-loud quasars currently known within 1 Gyr from the Big Bang () and the properties of their host galaxies have not been explored in detail. We present…
Molecular gas in z~6 quasar host galaxies
Roberto Decarli, Antonio Pensabene, Bram Venemans +19
We investigate the molecular gas content of z~6 quasar host galaxies using the IRAM / Northern Extended Millimeter Array. We target the 3mm dust continuum, and the line emission fr…