activity
19932026
most citedThe Soft X-Ray Properties of a Complete Sample of Optically Selected Quasars II. Final Results

552 citations · 6.7k across the 104 of their papers we have counts for

collaborators

106 papers

astro-ph.GA2026

The SKA-VLBI Perspective on Radio-Quiet AGN

Francesca Panessa, Tao An, James Petley +21

The accretion-ejection mechanism in Active Galactic Nuclei (AGN) remains a central open problem in astrophysics, tied to the role of AGN feedback in galaxy formation and evolution.…

astro-ph.GA2025

Radio Emission from Broad Absorption Line Quasars

Sina Chen, Ehud Behar, Ari Laor +1

Broad Absorption Line Quasars (BALQs) generally exhibit significant outflows that may interact with the surrounding medium, resulting in radio emission. We selected a sample of 13…

astro-ph.HE2025★ 5 cited

ALMA polarimetry of radio-quiet AGNs

E. Shablovinskaia, C. Ricci, R. Paladino +10

The compact mm emission ubiquitously found in radio-quiet active galactic nuclei (RQ AGN) exhibits properties consistent with synchrotron radiation from a small region (1 lig…

astro-ph.GA2024★ 1 cited

A dichotomy in the 1-24 GHz parsec-scale radio spectra of radio-quiet quasars

Sina Chen, Ari Laor, Ehud Behar +3

We present the pc-scale radio spectra of a representative sample of 13 Palomar-Green radio-quiet quasars, based on our new Very Long Baseline Array (VLBA) observations at 8.4 and 2…

astro-ph.GA2024

Windy or not: Radio pc-scale evidence for a broad-line region wind in radio-quiet quasars

Sina Chen, Ari Laor, Ehud Behar +6

Does a broad-line region (BLR) wind in radio-quiet (RQ) active galactic nuclei (AGN) extend to pc scales and produce radio emission? We explore the correlations between a pc-scale…

astro-ph.HE2024★ 2 cited

Late-time radio brightening and emergence of a radio jet in the changing-look AGN 1ES 1927+654

Eileen T. Meyer, Sibasish Laha, Onic I. Shuvo +32

We present multi-frequency (5-345 GHz) and multi-resolution radio observations of 1ES 1927+654, widely considered one of the most unusual and extreme changing-look active galactic…