Results 131 to 140 of about 111,891 (295)

Satellites and Small Bodies With ALMA: Insights Into Solar System Formation and Evolution

AGU Advances, Volume 6, Issue 6, December 2025.
Abstract Our understanding of the formation and evolution of planetary systems has made major advances in the past decade. This progress has been driven in large part by the Atacama Large Millimeter/submillimeter Array (ALMA), which has given us an unprecedented view of solar system bodies themselves, and of the structure and chemistry of forming ...
Katherine de Kleer, Michael E. Brown, Martin Cordiner, Richard Teague   +3 more
wiley   +1 more source

The Physical Properties of Low-redshift FeLoBAL Quasars. IV. Optical–Near-IR Spectral Energy Distributions and Near-IR Variability Properties

The Astrophysical Journal
We present the optical–near-infrared spectral energy distributions (SED) and near-infrared variability properties of 30 low-redshift iron low-ionization Broad Absorption Line quasars (FeLoBALQs) and matched samples of LoBALQs and unabsorbed quasars ...
Karen M. Leighly, Hyunseop Choi, Michael Eracleous, Donald M. Terndrup, Sarah C. Gallagher, Gordon T. Richards   +5 more
doaj   +1 more source

The host galaxies of low luminosity quasars at high redshift

, 2005
We present VLT/ISAAC near-infrared imaging of the host galaxies of 15 low luminosity quasars at 1 < z < 2. This work complements our studies to trace the cosmological evolution of the host galaxies of high luminosity quasars.
A. Treves, Bahcall, Barger, Bettoni, Bressan, de Vries, Dunlop, Falomo, Falomo, Ferrarese, Häring, J.K. Kotilainen, Kauffmann, Kauffmann, Kukula, M. Uslenghi, Madau, Marconi, Nolan, Pagani, Pentericci, R. Falomo, Veron-Cetty, Willott, Yu   +24 more
core   +1 more source

A Comparative Study of VTEC Estimates Derived From S/X VLBI and VGOS Observations

Space Weather, Volume 23, Issue 12, December 2025.
Abstract The ionosphere, which strongly varies in time and space, is one of the largest error sources for microwave measurements, if not accounted for accurately. Especially for single‐frequency observations, precise ionospheric models are needed to correct for the ionospheric delays. This study explores the utility of Very Long Baseline Interferometry
Arno Rüegg, Grzegorz Kłopotek, Benedikt Soja   +2 more
wiley   +1 more source

Discovery of six high-redshift quasars with the Lijiang 2.4m telescope and the Multiple Mirror Telescope

, 2012
Quasars with redshifts greater than 4 are rare, and can be used to probe the structure and evolution of the early universe. Here we report the discovery of six new quasars with $i$-band magnitudes brighter than 19.5 and redshifts between 2.4 and 4.6 from
Chen-Wei Yang, Constantin, Fan, Fan, Hong-Yan Zhou, Hu, Kong, Markwardt, Peng Jiang, Qian Yang, Richards, Richards, Schlegel, Schneider, Shen, Su, Tsuzuki, Vestergaard, Vestergaard, Wei-Min Yi, Wen-Juan Liu, Wen-Wen Zuo, Wright, Wu, Wu, Wu, Wu, Wu, Wu, Wu, Xin-Wen Shu, Xue-Bing Wu, York, Zhao   +33 more
core   +1 more source

Effect of MgO and Al2O3 precursors on 3D‐printed cordierite lattice structures by a novel emulsion‐based PDC route

Journal of the American Ceramic Society, Volume 108, Issue 12, December 2025.
Development of cordierite lattice structures from DIW of silicone‐based emulsions, in multiple forms (aqueous phase as suspension of oxide nanoparticles, as solution of Mg and Al salts, or as solution/suspension). Abstract The development of advanced ceramic materials with tailored microstructures is essential for meeting the demands of many high ...
Valeria Diamanti, Hamada Elsayed, Tobias Fey, Enrico Bernardo   +3 more
wiley   +1 more source

Machine Learning–based Search of High-redshift Quasars

The Astrophysical Journal Supplement Series
We present a machine learning search for high-redshift (5.0 < z < 6.5) quasars using the combined photometric data from the Dark Energy Spectroscopic Instrument (DESI) Imaging Legacy Surveys and the Wide-field Infrared Survey Explorer survey.
Guangping Ye, Huanian Zhang, Qingwen Wu
doaj   +1 more source

A Study of Quasar Radio Emission from the VLA FIRST Survey

, 1999
Using the most recent (1998) version of the VLA FIRST survey radio catalog, we have searched for radio emission from 1704 quasars taken from the most recent (1993) version of the Hewitt and Burbidge quasar catalog.
Ajit Kembhavi, Miller L., Terlevich R., Yogesh Wadadekar   +3 more
core   +2 more sources

Quasar viscosity crisis [PDF]

Nature Astronomy, 2018
For consistency with Nature policy, the version posted here is the text as submitted to Nature Astronomy in November 2017. The final version is available at the DOI below, and differs slightly in wording.
openaire   +3 more sources

Residual Disease in Patients with Axial Spondyloarthritis: A Post-Hoc Analysis of the QUASAR Study [PDF]

, 2022
Salvatore D’Angelo, Carlo Salvarani, Francesca Marando, Giuliana Gualberti, Lucia Novelli, Giacomo Curradi, Giovanni Tripepi, Annalisa Pitino, Roberta Ramonda, Antonio Marchesoni   +9 more
openalex   +1 more source