VLBA Continuum Observations of NGC 4258: Constraints on an Advection-Dominated Accretion Flow

Preprint

20 February 1998

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/9802264

Abstract

We report a 3 sigma upper limit of 220 microJanskys on any 22-GHz continuum emission coincident with the central engine in NGC 4258. If NGC 4258 is powered by an advection-dominated accretion flow, this radio upper limit implies that the inner advection-dominated flow cannot extend significantly beyond about 100 Schwarzschild radii.

Keywords

CONTINUUM OBSERVATIONS
ADVECTION DOMINATED
DOMINATED ACCRETION
VLBA CONTINUUM
ACCRETION FLOW
RADII
NGC

All Related Versions

Version 1, 1998-02-20, ArXiv
Published version: The Astrophysical Journal, 497 (2), L69.

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