Results 201 to 210 of about 117,210 (326)

A Pilot Study for the CSST Slitless Spectroscopic Quasar Survey Based on Mock Data

open access: yesThe Astrophysical Journal
The wide survey of the Chinese Space Station Telescope (CSST) will observe a large field of 17,500 deg ^2 . The GU, GV, and GI grism observations of CSST will cover the wavelength range from 2550 to 10000 Å at a resolution of R  ∼ 200 and a depth of ...
Yuxuan Pang   +6 more
doaj   +1 more source

Searching for dual/lensed quasar candidates with spectroscopic surveys [PDF]

open access: yesarXiv
Dual and lensed quasars are valuable astrophysical targets in many aspects. Dual quasars, considered as the precursors of supermassive black hole binaries, can provide crucial insights into how black hole mergers drive the growth of supermassive black holes and influence the evolution of galaxies.
arxiv  

VaDAR: Varstrometry for Dual AGN Using Radio Interferometry

open access: yesThe 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   +7 more
doaj   +1 more source

A Surprising Excess of Radio Emission in Extremely Stable Quasars: A Unique Clue to Jet Launching?

open access: yesThe Astrophysical Journal
Quasars are generally divided into jetted radio-loud and nonjetted radio-quiet ones, but why only 10% of quasars are radio-loud has been puzzling for decades.
Wen-Yong Kang   +8 more
doaj   +1 more source

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