A Physical Model for the Origin of Quasar Lifetimes
, 2005 We propose a model of quasar lifetimes in which observational quasar lifetimes and an intrinsic lifetime of rapid accretion are strongly distinguished by the physics of obscuration by surrounding gas and dust.
Bouchet P. +9 more
core +1 more source
Russian VLBI network “Quasar”: Current status and outlook
Geodesy and Geodynamics, 2019 This paper presents the past, present and future status of the Russian VLBI network “Quasar”. This network has been developed for at least 20 years by the Institute of Applied Astronomy of the Russian Academy of Sciences (IAA RAS).
N. Shuygina +17 more
doaj +1 more source
Listerin Alleviates Alzheimer's Disease through IRE1‐mediated Decay of TLR4 mRNA
Advanced Science, Volume 12, Issue 32, August 28, 2025.Alzheimer's disease (AD) progression is influenced by microglia‐mediated neuroinflammation. Here, it is demonstrated that Listerin suppresses neuroinflammatory signaling and cognitive impairment in AD models by triggering IRE1α‐mediated TLR4 mRNA decay. Adenoviral Listerin delivery reduces amyloid‐β pathology, positioning it as a new therapeutic target.
Fei Qin +9 more
wiley +1 more source
Quasars in the COSMOS Field [PDF]
The Astrophysical Journal, 2006 Accepted for publication in ApJ; emulateapj style; 25 pages, 13 figures, 4 ...
Prescott, M. K. M. +3 more
openaire +5 more sources
Calibrating the Galaxy Halo - Black Hole Relation Based on the Clustering of Quasars
, 2004 The observed number counts of quasars may be explained either by long-lived activity within rare massive hosts, or by short-lived activity within smaller, more common hosts.
Abraham Loeb +4 more
core +1 more source
Quasar-mode Feedback in Nearby Type 1 Quasars: Ubiquitous Kiloparsec-scale Outflows and Correlations with Black Hole Properties [PDF]
, 2017 The prevalence and properties of kiloparsec-scale outflows in nearby Type 1 quasars have been the subject of little previous attention. This work presents Gemini integral field spectroscopy of 10 Type 1 radio-quiet quasars at .
D. Rupke, K. Gültekin, S. Veilleux
semanticscholar +1 more source
4D‐MRI at 0.55T for internal target volume delineation in liver radiation therapy planning
Medical Physics, Volume 52, Issue 8, August 2025.Abstract Background Low‐field MRI provides superior soft‐tissue contrast compared to CT while costing significantly less than high‐field MRI, which makes it a more accessible option for MRI‐guided radiation therapy planning. Four‐dimensional MRI (4D‐MRI) is a technique that has been increasingly adopted clinically for internal target volume (ITV ...
Xin Miao +10 more
wiley +1 more source
Probing ~100 AU Intergalactic MgII Absorbing "Cloudlets" with Quasar Microlensing
, 2006 Intergalactic MgII absorbers are known to have structures down to scales ~ 10^{2.5} pc, and there are now indications that they may be fragmented on scales
Kayser R., Subo Dong
core +3 more sources
Implications of z ∼ 6 Quasar Proximity Zones for the Epoch of Reionization and Quasar Lifetimes [PDF]
, 2017 We study quasar proximity zones in the redshift range 5.77 ≤ z ≤ 6.54 by homogeneously analyzing 34 medium-resolution spectra, encompassing both archival and newly obtained data, and exploiting recently updated systemic redshift and magnitude ...
A. Eilers +9 more
semanticscholar +1 more source
First Spectroscopic Study of a Young Quasar [PDF]
Astrophysical Journal, 2018 The quasar lifetime tQ is one of the most fundamental quantities for understanding quasar evolution and the growth of supermassive black holes (SMBHs), but remains uncertain by several orders of magnitude.
A. Eilers, J. Hennawi, F. Davies
semanticscholar +1 more source