Results 91 to 100 of about 515 (214)

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

Identification Of Outflows And Candidate Dual Active Galactic Nuclei In SDSS Quasars At Z=0.8-1.6 [PDF]

, 2013
We present a sample of 131 quasars from the Sloan Digital Sky Survey at redshifts 0.8 < z < 1.6 with double peaks in either of the high-ionization narrow emission lines [Ne V]lambda 3426 or [Ne III]lambda 3869.
Kennefick, Daniel, Lacy, Claud H. Sandberg, Kennefick, Julia, Barrows, R. Scott, Berrier, Joel C., Comerford, Julia M.   +5 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

Time delays for eleven gravitationally lensed quasars revisited [PDF]

, 2011
peer reviewedAims. We test the robustness of published time delays for 11 lensed quasars by using two techniques to measure time shifts in their light curves. Methods.
Magain, Pierre, P. Magain, E. Eulaers, Eulaers, Eva   +3 more
core   +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

The Canada-France High-z Quasar Survey: Nine New Quasars and the Luminosity Function at Redshift 6 [PDF]

, 2010
International audienceWe present discovery imaging and spectroscopy for nine new z ∼ 6 quasars found in the Canada–France High-z Quasar Survey (CFHQS) bringing the total number of CFHQS quasars to 19.
Delfosse, X., Jacqueline Bergeron, Reylé, C., Omont, A., Loic Albert, David Crampton, Thierry Forveille, Albert, L., Céline Reylé, Philippe Delorme, John B. Hutchings, Mclure, R., David Schade, Bergeron, J., Schad, D., Forveille, T., Hutchings, J.B., Willott, C.J., Alain Omont, Chris J. Willott, Delorme, P., Xavier Delfosse, Ross J. McLure   +22 more
core   +1 more source

VaDAR: Varstrometry for Dual AGN Using Radio Interferometry

The Astrophysical Journal
Binary and dual active galactic nuclei (AGNs) are an important observational tool for studying the formation and dynamical evolution of galaxies and supermassive black holes.
Emma Schwartzman, Tracy E. Clarke, Kristina Nyland, Nathan J. Secrest, Ryan W. Pfeifle, Henrique Schmitt, Shobita Satyapal, Barry Rothberg   +7 more
doaj   +1 more source

Molecular gas in type 2 quasars at z ~ 0.2-0.3 [PDF]

, 2013
We present results of CO(1-0) spectroscopic observations of 10 Sloan Digital Sky Survey type 2 quasars (QSO2) at z ~ 0.2-0.3 observed with the 30-m IRAM radio telescope and the Australia Telescope Compact Array.
Colina, L., Rodríguez, M., Graciá Carpio, J., Pérez Torres, M., Drouart, Guillaume, Humphrey, A., Humphrey, Andrew, Villar Martín, Montserrat, García-Burillo, S., Colina, Luis, Drouart, G., Graciá-Carpio, J., Planesas, P., Arribas, S., Arribas-Mocoroa, Santiago, García Burillo, S., Villar-Martín, M., Emonts, B.   +17 more
core   +1 more source

Discovery of spectacular quasar-driven superbubbles in red quasars. [PDF]

Sci Adv, 2023
Shen L, Liu G, He Z, Zakamska NL, Glikman E, Greene JE, Hu W, Mou G, Wylezalek D, Rupke DSN.   +9 more
europepmc   +1 more source