Results 61 to 70 of about 2,139,047 (199)

Varstrometry for Off-nucleus and Dual Sub-Kpc AGN (VODKA): Long-slit Optical Spectroscopic Follow-up with Gemini/GMOS and Hubble Space Telescope/STIS

The Astrophysical Journal
High spatial and spectral resolution observations are essential for identifying subarcsecond dual and lensed quasars and confirming their redshifts. We present Gemini/Gemini Multi-Object Spectrograph and Hubble Space Telescope/STIS optical spectra for 27
Yu-Ching Chen, Arran C. Gross, Xin Liu, Yue Shen, Nadia L. Zakamska, Hsiang-Chih Hwang, Ming-Yang Zhuang   +6 more
doaj   +1 more source

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

Quasars versus Microquasars: Scaling and Particle Acceleration

Research Notes of the AAS
Quasars and microquasars both contain accreting black holes and power nonthermal double radio sources, but differ in more than their scales: Quasars are proportionally much more efficient accelerators of energetic electrons.
J. Katz
semanticscholar   +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

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

Varstrometry for Off-nucleus and Dual Sub-Kpc AGN (VODKA): A Mix of Singles, Lenses, and True Duals at Cosmic Noon

The Astrophysical Journal
Dual active galactic nuclei (AGNs), a phase in some galaxy mergers during which both central supermassive black holes (SMBHs) are active, are expected to be a key observable stage leading up to SMBH mergers.
Arran C. Gross, Yu-Ching Chen, Masamune Oguri, Liam Nolan, Xin Liu, Yue Shen, Ming-Yang Zhuang, Junyao Li, Nadia L. Zakamska, Hsiang-Chih Hwang, Yuzo Ishikawa   +10 more
doaj   +1 more source

Performance evaluation of a second‐generation O‐ring‐shaped image‐guided radiotherapy system with a gimbal‐mounted linear accelerator and real‐time tracking capabilities

Journal of Applied Clinical Medical Physics, Volume 26, Issue 11, November 2025.
Abstract Purpose OXRAY, a state‐of‐the‐art radiation therapy system commercialized by Hitachi High‐Tech Ltd. in 2023, integrates unique beam delivery and image‐guided radiation therapy (IGRT) technologies as the successor to Vero4DRT. This study evaluated the performance of this second‐generation O‐ring‐shaped linear accelerator. Methods The percentage
Kohei Kawata, Yukako Kishigami, Hideaki Hirashima, Yohei Sawada, Maika Urago, Takahiro Fujimoto, Tetsuo Fukuda, Takashi Mizowaki, Mitsuhiro Nakamura   +8 more
wiley   +1 more source

Comparative evaluation of volume and helical four‐dimensional computed tomography using canon system

Journal of Applied Clinical Medical Physics, Volume 26, Issue 11, November 2025.
Abstract Background Four‐dimensional computed tomography (4DCT) is an advanced imaging technique designed to capture anatomical motion over time, enabling more accurate evaluation of tumor and organ motion owing to respiration, while minimizing motion‐related artifacts.
Changhwan Kim, Eunho Lee, Jae Hong Yu, Hojae Kim, Seyjoon Park, Soorim Han, Tae Ho Kim, Min Cheol Han, Chae‐Seon Hong, Jin Sung Kim   +9 more
wiley   +1 more source

SBS 0909+532: A New Double Gravitational Lens or Binary Quasar? [PDF]

The Astrophysical Journal, 1997
The z=1.377, B=17.0 mag quasar SBS 0909+532 A, B is a double with two images separated by 1.107 +/- 0.006 arcsec. Because the faint image has an emission line at the same wavelength as the MgII 2798 A emission line of the quasar, and lacks the broad MgIb absoption feature expected for a star with the same colors (a K star), we conclude that image B is ...
Kochanek, C. S., Falco, E. E., Schild, R., Dobrzycki, A., Engels, D., Hagen, H. -J.   +5 more
openaire   +2 more sources

Simultaneous liver T1, T2, and ADC MR fingerprinting using optimized motion‐compensated diffusion preparations: An initial validation on volunteers

Magnetic Resonance in Medicine, Volume 94, Issue 5, Page 2173-2189, November 2025.
Abstract Purpose To develop a novel MR fingerprinting sequence using optimized motion‐compensated diffusion preparations for simultaneous T1, T2, and ADC quantification of liver tissue in a single breath‐held scan. Methods A radial spoiled gradient echo acquisition with magnetization preparation modules for T1, T2, and ADC encoding is proposed.
C. Velasco, C. Castillo‐Passi, N. Chaher, D. C. Karampinos, P. Irarrazaval, A. Phinikaridou, R. M. Botnar, C. Prieto   +7 more
wiley   +1 more source