activity
20082026
most citedDepth of Maximum of Air-Shower Profiles at the Pierre Auger Observatory: Composition Implications

309 citations · 2.2k across the 49 of their papers we have counts for

collaborators

50 papers

astro-ph.GA2026

A VLBA-resolved Jet Associated with Super-Eddington Accretion in a Radio-loud Quasar at

Sakiko Obuchi, Ingyin Zaw, Kazuhiro Hada +2

We report the detailed jet properties of eROSITA Final Equatorial Depth Survey (eFEDS) J084222.9+001000 (hereafter ID830), a radio-loud super-Eddington quasar at , reveal…

astro-ph.GA2025

Discovery of an X-ray Luminous Radio-Loud Quasar at : A Possible Transitional Super-Eddington Phase

Sakiko Obuchi, Kohei Ichikawa, Satoshi Yamada +11

We report the multiwavelength properties of eFEDS J084222.9+001000 (hereafter ID830), a quasar at , identified as the most X-ray luminous radio-loud quasar in the eROSITA…

astro-ph.HE2025

Peering into the heart of darkness with VLBA : Radio Quiet AGN in the JWST North Ecliptic Pole Time-Domain Field

Payaswini Saikia, Ramon Wrzosek, Joseph Gelfand +27

We present initial results from the 4.8 GHz Very Long Baseline Array (VLBA) survey of the JWST North Ecliptic Pole Time-Domain Field (TDF). From 106 radio sources found in the Karl…

astro-ph.HE2024

An Intermediate Mass Black Hole Hidden Behind Thick Obscuration

Peter G. Boorman, Daniel Stern, Roberto J. Assef +12

Recent models suggest approximately half of all accreting supermassive black holes (SMBHs; 10 M) are expected to undergo intense growth phase…

astro-ph.GA2022★ 22 cited

Dependence of the Radio Emission on the Eddington Ratio of Radio-Quiet Quasars

A. Alhosani, J. D. Gelfand, I. Zaw +4

Roughly 10% of quasars are "radio-loud", producing copious radio emission in large jets. The origin of the low-level radio emission seen from the remaining 90% of quasars is unclea…

astro-ph.GA2021★ 12 cited

A Uniformly Selected, Southern-Sky 6dF, Optical AGN Catalog

Yan-Ping Chen, Ingyin Zaw, Glennys R Farrar +1

We have constructed a catalog of active galactic nuclei (AGNs) with , based on optical spectroscopy, from the parent sample of galaxies in the 6dF galaxy survey (Final Re…