Pith. sign in

REVIEW 1 cited by

Resolving the inner parsec of the blazar J1924-2914 with the Event Horizon Telescope

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2208.01662 v1 pith:XDIZ5FSR submitted 2022-08-02 astro-ph.HE

Resolving the inner parsec of the blazar J1924-2914 with the Event Horizon Telescope

Sara Issaoun , Maciek Wielgus , Svetlana Jorstad , Thomas P. Krichbaum , Lindy Blackburn , Michael Janssen , Chi-Kwan Chan , Dominic W. Pesce
show 22 more authors
Jose L. Gomez Kazunori Akiyama Monika Moscibrodzka Ivan Marti-Vidal Andrew Chael Rocco Lico Jun Liu Venkatessh Ramakrishnan Mikhail Lisakov Antonio Fuentes Guang-Yao Zhao Kotaro Moriyama Avery E. Broderick Paul Tiede Nicholas R. MacDonald Yosuke Mizuno Efthalia Traianou Laurent Loinard Jordy Davelaar Mark Gurwell Ru-Sen Lu Event Horizon Telescope Collaboration
This is my paper
classification astro-ph.HE
keywords j1924-2914sourceaprilblazarimagesarraycompactevent
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
0 comments
read the original abstract

The blazar J1924-2914 is a primary Event Horizon Telescope (EHT) calibrator for the Galactic Center's black hole Sagittarius A*. Here we present the first total and linearly polarized intensity images of this source obtained with the unprecedented 20 $\mu$as resolution of the EHT. J1924-2914 is a very compact flat-spectrum radio source with strong optical variability and polarization. In April 2017 the source was observed quasi-simultaneously with the EHT (April 5-11), the Global Millimeter VLBI Array (April 3), and the Very Long Baseline Array (April 28), giving a novel view of the source at four observing frequencies, 230, 86, 8.7, and 2.3 GHz. These observations probe jet properties from the subparsec to 100-parsec scales. We combine the multi-frequency images of J1924-2914 to study the source morphology. We find that the jet exhibits a characteristic bending, with a gradual clockwise rotation of the jet projected position angle of about 90 degrees between 2.3 and 230 GHz. Linearly polarized intensity images of J1924-2914 with the extremely fine resolution of the EHT provide evidence for ordered toroidal magnetic fields in the blazar compact core.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Polarization Signatures from GRMHD Simulations of Black Hole Accretion

    astro-ph.HE 2026-05 unverdicted novelty 2.0

    Polarization signatures from GRMHD simulations of black hole accretion can help probe disk, corona, and jet properties when combined with X-ray polarimetry observations.