A SPectroscopic Survey of Biased Halos in the Reionization Era (ASPIRE): A First Look at the Rest-frame Optical Spectra of z > 6.5 Quasars Using JWST [PDF]
The Astrophysical Journal Letters, 2023 Studies of rest-frame optical emission in quasars at z > 6 have historically been limited by the wavelengths accessible by ground-based telescopes. The James Webb Space Telescope (JWST) now offers the opportunity to probe this emission deep into the ...
Jinyi Yang +55 more
doaj +2 more sources
Target Selection and Validation of DESI Quasars [PDF]
The Astrophysical Journal, 2023 The Dark Energy Spectroscopic Instrument (DESI) survey will measure large-scale structures using quasars as direct tracers of dark matter in the redshift range 0.9 < z < 2.1 and using Ly α forests in quasar spectra at z > 2.1.
Edmond Chaussidon +56 more
doaj +2 more sources
EIGER. V. Characterizing the Host Galaxies of Luminous Quasars at z ≳ 6 [PDF]
The Astrophysical Journal, 2023 We report JWST/NIRCam measurements of quasar host galaxy emissions and supermassive black hole (SMBH) masses for six quasars at 5.9 < z < 7.1 in the Emission-line galaxies and Intergalactic Gas in the Epoch of Reionization (EIGER) project. We obtain deep
Minghao Yue +8 more
doaj +2 more sources
Gravitationally lensed quasars in Gaia – IV. 150 new lenses, quasar pairs, and projected quasars [PDF]
Monthly Notices of the Royal Astronomical Society, 2022 We report the spectroscopic follow-up of 175 lensed quasar candidates selected using Gaia Data Release 2 observations following Lemon et al. 2019. Systems include 86 confirmed lensed quasars and a further 17 likely lensed quasars based on imaging and ...
C. Lemon +12 more
semanticscholar +5 more sources
Quasars and the Intergalactic Medium at Cosmic Dawn [PDF]
Annual Review of Astronomy and Astrophysics, 2022 Quasars at cosmic dawn provide powerful probes of the formation and growth of the earliest supermassive black holes (SMBHs) in the Universe, their connections to galaxy and structure formation, and the evolution of the intergalactic medium (IGM) at the ...
Xiaohui Fan, E. Bañados, R. Simcoe
semanticscholar +1 more source
The Million Quasars (Milliquas) Catalogue, v8 [PDF]
The Open Journal of Astrophysics, 2023 Announcing the final release, v8, of the Milliquas (Million Quasars) quasar catalogue which presents all published quasars to 30 June 2023, including quasars from the first releases of the Dark Energy Spectroscopic Instrument (DESI) and the SDSS-DR18 ...
E. Flesch
semanticscholar +1 more source
Testing the cosmological principle with CatWISE quasars: A bayesian analysis of the number-count dipole [PDF]
Monthly notices of the Royal Astronomical Society, 2022 The Cosmological Principle, that the Universe is homogeneous and isotropic on sufficiently large scales, underpins the standard model of cosmology.
Lawrence Dam, G. Lewis, B. Brewer
semanticscholar +1 more source
Probing Early Supermassive Black Hole Growth and Quasar Evolution with Near-infrared Spectroscopy of 37 Reionization-era Quasars at 6.3 < z ≤ 7.64 [PDF]
Astrophysical Journal, 2021 We report the results of near-infrared spectroscopic observations of 37 quasars in the redshift range 6.3 < z ≤ 7.64, including 32 quasars at z > 6.5, forming the largest quasar near-infrared spectral sample at this redshift. The spectra, taken with Keck,
Jinyi Yang +20 more
semanticscholar +1 more source
Detecting and Characterizing Young Quasars. III. The Impact of Gravitational Lensing Magnification
The Astrophysical Journal, 2023 We test the impact of gravitational lensing on the lifetime estimates of seven high-redshift quasars at redshift z ≳ 6. The targeted quasars are identified by their small observed proximity zone sizes, which indicate extremely short quasar lifetimes ( t ...
Minghao Yue +10 more
doaj +1 more source
Energy input from quasars regulates the growth and activity of black holes and their host galaxies [PDF]
Nature, 2005 In the early Universe, while galaxies were still forming, black holes as massive as a billion solar masses powered quasars. Supermassive black holes are found at the centres of most galaxies today, where their masses are related to the velocity ...
T. Matteo, V. Springel, L. Hernquist
semanticscholar +1 more source