Results 91 to 100 of about 18,849 (212)

Small-scale double quasars discovered in the DECam Legacy Survey

, 2021
9 pages, 6 figures, submitted to MNRAS, comments are ...
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

Kinematics of H i and O vi Absorbers: Insights into the Turbulence Driver of the Multiphase Circumgalactic Medium

The Astrophysical Journal Letters
We investigate large-scale gas kinematics in the multiphase circumgalactic medium (CGM) using the observed correlation between line width (Doppler b parameter) and column density ( N ) for H i and O vi absorbers. Leveraging extensive public galaxy survey
Zhijie Qu, Hsiao-Wen Chen, Eliana Schiller, Jing Wang, Max Gronke   +4 more
doaj   +1 more source

Combined ultraviolet studies of astronomical sources [PDF]

Ultraviolet studies of astronomical sources are discussed. Some studies utilized IVE data. Non-radiative shock at the edge of the Cygnses Loop, stellar flares, local interestellar medium, hot galaxies, stellar mass ejection, contact binaries, double ...
Dupree, A. K., Giampapa, M. S., Hartmann, L. W., Huchra, J. P., Noyes, R. W., Raymond, J. C.   +5 more
core   +1 more source

Host Galaxies of Luminous Type 2 Quasars at z ~ 0.5

, 2009
We present deep Gemini GMOS optical spectroscopy of nine luminous quasars at redshifts z ~ 0.5, drawn from the SDSS type 2 quasar sample. Our targets were selected to have high intrinsic luminosities (M_V < -26 mag) as indicated by the [O III] 5007 A ...
Adelman-McCarthy, Antonucci, Bahcall, Bell, Bennert, Bernardi, Canalizo, Canalizo, Canalizo, Chapman, Cid Fernandes, Connolly, De Robertis, Ellison, Ferrarese, Gebhardt, González Delgado, Greene, Greene, Greene, Greene, Guyon, Heckman, Heckman, Heckman, Ho, Ho, Ho, Ho, Hopkins, Jenny E. Greene, Julian H. Krolik, Kirhakos, Kormendy, Kunth, Lacy, Lauer, Magorrian, Marconi, Matheson, Michael A. Strauss, Nadia L. Zakamska, Osterbrock, Pierce, Reichard, Reyes, Richards, Rigby, Schaerer, Shen, Shen, Silk, Smith, Smith, Timothy M. Heckman, Tran, Tremaine, Urrutia, Valdes, Vanden Berk, Watson, Wolf, Woo, Xin Liu, York, Zakamska, Zakamska, Zakamska, Zakamska   +68 more
core   +1 more source

Discovery of Merging Twin Quasars at z = 6.05

The Astrophysical Journal Letters
We report the discovery of two quasars at a redshift of z = 6.05 in the process of merging. They were serendipitously discovered from the deep multiband imaging data collected by the Hyper Suprime-Cam (HSC) Subaru Strategic Program survey.
Yoshiki Matsuoka, Takuma Izumi, Masafusa Onoue, Michael A. Strauss, Kazushi Iwasawa, Nobunari Kashikawa, Masayuki Akiyama, Kentaro Aoki, Junya Arita, Masatoshi Imanishi, Rikako Ishimoto, Toshihiro Kawaguchi, Kotaro Kohno, Chien-Hsiu Lee, Tohru Nagao, John D. Silverman, Yoshiki Toba   +16 more
doaj   +1 more source

High-resolution images of five radio quasars at early cosmological epochs

, 2010
Context: Until now, there have only been seven quasars at z>4.5 whose the high-resolution radio structure had been studied in detail with Very Long Baseline Interferometry (VLBI) imaging.
Best, Chen, Condon, D. Cseh, Falcke, Frey, Frey, Frey, Frey, Gurvits, Jackson, Jackson, K. É. Gabányi, Kellermann, Kellermann, Kovalev, L. I. Gurvits, Lima, Martí-Vidal, Momjian, Momjian, Momjian, Mosoni, O’Dea, O’Dea, Paragi, Peterson, Readhead, Romani, S. Frey, Sahni, Schneider, Shepherd, Urry, Veres, Vishwakarma, Vishwakarma, White, Wilkinson, Z. Paragi   +39 more
core   +1 more source

JWST Confirms the Nature of CID-42

The Astrophysical Journal
The galaxy CID-42 (CXOC J100043.1+020637.2) at z = 0.359 has been proposed to contain a promising candidate for a gravitational-wave recoiling supermassive black hole (SMBH), a slingshot SMBH from a triple-SMBH interaction, or a kiloparsec-scale dual ...
Junyao Li, Ming-Yang Zhuang, Yue Shen
doaj   +1 more source

High-Redshift Quasars at z ≥ 3—III: Parsec-Scale Jet Properties from Very Long Baseline Interferometry Observations

Universe
High-redshift active galactic nuclei (AGN) provide key insights into early supermassive black hole growth and cosmic evolution. This study investigates the parsec-scale properties of 86 radio-loud quasars at z ≥ 3 using very long baseline interferometry (
Shaoguang Guo, Tao An, Yuanqi Liu, Chuanzeng Liu, Zhijun Xu, Yulia Sotnikova, Timur Mufakharov, Ailing Wang   +7 more
doaj   +1 more source

A Multiwavelength Study of ELAN Environments (AMUSE2): The Impact of Dense Environment on Massive Dusty Star-forming Galaxies at Cosmic Noon

The Astrophysical Journal
To understand how massive galaxies are influenced by their surroundings, we present new Atacama Large Millimeter/submillimeter Array and Northern Extended Millimeter Array observations as part of A Multiwavelength Study of Enormous Ly α Nebula (ELAN ...
Yu-Jan Wang, Chian-Chou Chen, Fabrizio Arrigoni Battaia, Roberto Decarli, Helmut Dannerbauer, Po-Feng Wu   +5 more
doaj   +1 more source