Predicting the Yields of z > 6.5 Quasar Surveys in the Era of Roman and Rubin
The Astrophysical Journal, 2023 About 70 luminous quasars discovered at z > 6.5 are strongly biased toward the bright end, thus not providing a comprehensive view of quasar abundance beyond the cosmic dawn. We present the predicted results of the Roman/Rubin high-redshift quasar survey,
Wei Leong Tee +5 more
doaj +1 more source
Exploiting the IRT-THESEUS Capability to Observe Lensed Quasars
Galaxies, 2021 THESEUS is an ESA space based project, which aims to explore the early universe by unveiling a complete census of Gamma-ray Burst (GRB) population in the first billion years.
Lindita Hamolli +3 more
doaj +1 more source
What makes red quasars red? Observational evidence for dust extinction from line ratio analysis
, 2017 Red quasars are very red in the optical through near-infrared (NIR) wavelengths, which is possibly due to dust extinction in their host galaxies as expected in a scenario in which red quasars are an intermediate population between merger-driven star ...
Im, Myungshin, Kim, Dohyeong
core +1 more source
First In Vivo 23Na Human Imaging at 10.5 T Using a Combined Sodium‐Proton Transceiver Body Array
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose To demonstrate the first in vivo human 23Na MRI at 10.5 T using a novel dual‐tuned transceiver body array and to evaluate a self‐gating approach for respiratory motion compensation, focusing on renal imaging. Methods A custom‐built eight‐channel 23Na‐loop 1H‐dipole transceiver array was designed, constructed, and characterized.
Simon Schmidt +2 more
wiley +1 more source
Highly Accreting Quasars at High Redshift
Frontiers in Astronomy and Space Sciences, 2018 We present preliminary results of a spectroscopic analysis for a sample of type 1 highly accreting quasars (L/LEdd ~ 1.0) at high redshift, z ~2–3.
Mary L. Martínez-Aldama +7 more
doaj +1 more source
X-ray Insights into the Nature of Quasars with Redshifted Broad Absorption Lines
, 2017 We present $Chandra$ observations of seven broad absorption line (BAL) quasars at $z=0.863$-2.516 with redshifted BAL troughs (RSBALs). Five of our seven targets were detected by $Chandra$ in 4-13 ks exposures with ACIS-S. The $\alpha_{\rm ox}$ values, $\
Ahmed, N. S. +10 more
core +2 more sources
High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data III: A Color Selected Sample at i^*<20 in the Fall Equatorial Stripe [PDF]
, 2000 This is the third paper in a series aimed at finding high-redshift quasars from five-color (u'g'r'i'z') imaging data taken along the Celestial Equator by the SDSS during its commissioning phase.
Anderson, J E +25 more
core +2 more sources
DESI z ≳ 5 Quasar Survey. I. A First Sample of 400 New Quasars at z ∼ 4.7–6.6 [PDF]
, 2023 Jinyi Yang +41 more
openalex +1 more source
A Unified, Merger-driven Model of the Origin of Starbursts, Quasars, the Cosmic X-Ray Background, Supermassive Black Holes, and Galaxy Spheroids [PDF]
, 2005 We present an evolutionary model for starbursts, quasars, and spheroidal galaxies in which mergers between gas-rich galaxies drive nuclear inflows of gas, producing starbursts and feeding the buried growth of supermassive black holes (BHs) until feedback
P. Hopkins +5 more
semanticscholar +1 more source
Rapidly star-forming galaxies adjacent to quasars at redshifts exceeding 6 [PDF]
Nature, 2017 The existence of massive (1011 solar masses) elliptical galaxies by redshift z ≈ 4 (refs 1, 2, 3; when the Universe was 1.5 billion years old) necessitates the presence of galaxies with star-formation rates exceeding 100 solar masses per year at z > 6 ...
R. Decarli +13 more
semanticscholar +1 more source