Diffuse Synchrotron Emission Associated with the Starburst in the Circumnuclear Disk of NGC 1275
arXiv:2105.11073 · doi:10.3847/2041-8213/ac03ba
Abstract
Recent Atacama Large Millimeter/submillimeter Array (ALMA) observations found a positive correlation between the mass of dense molecular gas in the circumnuclear disks (CNDs) and accretion rate to the active galactic nuclei (AGNs). This indicates that star formation activity in the CNDs is essential for triggering the accretion of mass to AGNs. Although the starburst-driven turbulence is a key mechanism for the transfer of angular momentum and the resultant mass accretion from the CND scale to the inner radius, the observational evidence is lacking. We report the very-long-baseline-interferometry (VLBI) detection of the diffuse synchrotron emission on a scale of several tens-pc coinciding spatially with the molecular gas disk recently discovered by ALMA observations in NGC~1275. The synchrotron emissions are most likely resulted from the relativistic electrons produced by the supernova explosions. This is an unambiguous evidence of the star formation activity in a CND. The turbulent velocity and the scale height of the CND predicted from the supernova-driven turbulence model agree with the observations, although the model-predicted accretion rate disagrees with the bolometric luminosity. This might indicate that additional mechanisms to enhance the turbulence is required for the inner disk. We discuss the multiphase nature of the CND by combining the information of the CO emission, synchrotron emission, and free-free absorption.
6 pages, 3 figures, Accepted for publication in ApJL
References in corpus (10)
- Magnetic support of the optical emission line filaments in NGC 1275
- VLBI Images of 49 Radio Supernovae in Arp 220
- Multi-phase Nature of a Radiation-Driven Fountain with Nuclear Starburst in a Low-mass Active Galactic Nucleus
- Coevolution of Supermassive Black Holes and Circumnuclear Disks
- Radially-Inflowing Molecular Gas in NGC 1275 Deposited by a X-ray Cooling Flow in the Perseus Cluster
- Cold gas in the Perseus cluster core: Excitation of molecular gas in filaments
- Discovery of a new subparsec counterjet in NGC 1275: the inclination angle and the environment
- Enhanced Polarized Emission from the One-Parsec-Scale Hotspot of 3C 84 as a Result of the Interaction with Clumpy Ambient Medium
- Ionized and hot molecular outflows in the inner 500 pc of NGC1275
- Obscuring fraction of active galactic nuclei implied by supernova and radiative feedbacks