VLA FRAMEx. I. Wideband Radio Properties of the AGN in NGC 4388

• DOI: 10.3847/1538-4357/ad11d4
• Publication Date: 2024-01-30T15:10:33Z
• Authors: Andrew J. Sargent; Travis C. Fischer; Megan C. Johnson; Alexander J. van ...; Nathan J. Secrest; Onic I. Shuvo; Phil J. Cigan; Krista L. Smith
• Keywords: Wideband; X-shaped radio galaxy

Abstract We present the first results from Karl G. Jansky Very Large Array (VLA) observations as a part of Fundamental Reference Active Galactic Nucleus (AGN) Monitoring Experiment, program to understand relationship between AGN accretion physics and wavelength-dependent position function time. With this VLA survey, we investigate radio properties volume-complete sample 25 hard X-ray-selected AGNs using in its wideband mode. observed targets A-array configuration at 4–12 GHz with all polarization products. In work, introduce our calibration imaging methods for analysis radio-quiet NGC 4388. calibrated imaged these data multiterm, multifrequency synthesis algorithm determine spatial, spectral, structure across continuous band. AGN, measure broken power law spectrum α = − 0.06 below break frequency 7.3 0.34 above. detect subarcsecond resolution both secondary knot. compare ancillary find that continuum is likely due winds interacting local interstellar medium gets resolved away subparsec spatial scales probed by Long Baseline Array. A well-known ionization cone southwest appears be projected material onto underside disk host galaxy.