A Multi-wavelength Study of the Turbulent Central Engine of the Low-mass AGN Hosted by NGC 404
- Nyland, Kristina
- Davis, Timothy A.
- Nguyen, Dieu D.
- Seth, Anil
- Wrobel, Joan M.
- Kamble, Atish
- Lacy, Mark
- Alatalo, Katherine
- Karovska, Margarita
- Maksym, W. Peter
- Mukherjee, Dipanjan
- Young, Lisa M.
DOIAbstract
The nearby dwarf galaxy NGC 404 harbors a low-luminosity active galactic nucleus powered by the lowest-mass (<150,000 M ⊙) central massive black hole (MBH), with a dynamical mass constraint, currently known, thus providing a rare low-redshift analog to the MBH "seeds" that formed in the early universe. Here, we present new imaging of the nucleus of NGC 404 at 12–18 GHz with the Karl G. Jansky Very Large Array (VLA) and observations of the CO(2–1) line with the Atacama Large Millimeter/Submillimeter Array (ALMA). For the first time, we have successfully resolved the nuclear radio emission, revealing a centrally peaked, extended source spanning 17 pc. Combined with previous VLA observations, our new data place a tight constraint on the radio ...
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