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Extreme Deconvolution Reimagined: Conditional Densities via Neural Networks and an Application in Quasar Classification
Yi Kang, Joseph F. Hennawi, Jan-Torge Schindler +2
Density estimation is a fundamental problem that arises in many areas of astronomy, with applications ranging from selecting quasars using color distributions to characterizing ste…
Hidden in Pixels. I. Discovery of dual "little red dots" indicates excess clustering on kilo-parsec scales
Takumi S. Tanaka, John D. Silverman, Kazuhiro Shimasaku +56
``Little Red Dots'' (LRDs) are an abundant high-redshift population newly discovered by the James Webb Space Telescope (JWST) and considered to be an early growth phase of supermas…
Monster radio jet (>66 kpc) observed in quasar at z5
Anniek J. Gloudemans, Frits Sweijen, Leah K. Morabito +6
We present the discovery of a large extended radio jet associated with the extremely radio-loud quasar J1601+3102 at from sub-arcsecond resolution imaging at 144 MHz with…
A Little Red Dot at within a Large Galaxy Overdensity
Jan-Torge Schindler, Joseph F. Hennawi, Frederick B. Davies +11
The nature of "Little Red Dots" and their relation to other forms of accreting supermassive black holes remain an open question. Here we report the discovery of a Little Red Dot at…
No Redshift Evolution in the Fe II/Mg II Flux Ratios of Quasars across Cosmic Time
Danyang Jiang, Masafusa Onoue, Linhua Jiang +13
The Fe II/Mg II emission line flux ratio in quasar spectra serves as a proxy for the relative Fe to alpha-element abundances in the broad line regions of quasars. Due to the expect…
"Little red dots" cannot reside in the same dark matter halos as comparably luminous unobscured quasars
Elia Pizzati, Joseph F. Hennawi, Joop Schaye +4
The James Webb Space Telescope (JWST) has uncovered a new population of candidate broad-line AGN emerging in the early Universe, named ''little red dots'' (LRDs) because of their c…