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20242026
most citedExtreme Galaxy-scale Outflows Are Frequent among Luminous Early Quasars

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astro-ph.GA2025

A close look at the black hole masses and hot dusty toruses of the first quasars with MIRI-MRS

Sarah E. I. Bosman, Javier Álvarez-Márquez, Frederick B. Davies +29

The presence of supermassive black holes (SMBHs, ) at remains a puzzle. While their existence appears to require exotic formation or growth proce…

astro-ph.GA2025

Quasar lifetime measurements from extended Ly nebulae at

Dominika Ďurovčíková, Anna-Christina Eilers, Romain A. Meyer +7

The existence of billion-solar-mass black holes hosted in luminous quasars within the first gigayear of cosmic history poses a challenge to our understanding of supermassive black…

astro-ph.GA2025

How similar are narrow-line Seyfert 1 galaxies and high-z type 1 AGN?

M. Berton, E. Järvelä, A. Tortosa +1

The recent observations of highly accreting supermassive black holes (SMBH) at very high redshift (4) with the James Webb Space Telescope (JWST) allowed us to shed light for the…

astro-ph.GA2025

(SHERRY) JCMT-SCUBA2 High Redshift Bright Quasar Survey -- II: the environment of z~6 quasars in sub-millimeter band

Qiong Li, Ran Wang, Xiaohui Fan +14

The formation of the first supermassive black holes is expected to have occurred in some most pronounced matter and galaxy overdensities in the early universe. We have conducted a…

astro-ph.GA2025

The Identification of Two JWST/NIRCam-Dark Starburst Galaxies at with ALMA

Fengwu Sun, Jinyi Yang, Feige Wang +20

We analyze two dusty star-forming galaxies at . These galaxies are selected from the ASPIRE survey, a JWST Cycle-1 medium and ALMA Cycle-9 large program targeting 25 quasars…

astro-ph.GA2025

Optical and near-infrared spectroscopy of quasars at : public data release and composite spectrum

Silvia Onorato, Joseph F. Hennawi, Jan-Torge Schindler +18

We present optical and near-infrared (NIR) spectroscopic observations for a sample of quasars at with absolute magnitudes at à in the range $-28.82…