DOI

https://doi.org/10.48717/pjaf-5t77

Project

ES098

Title

ES098A

Abstract

When a star passes too close to a supermassive black hole, it can be tidally disrupted, producing a luminous flare of electromagnetic radiation peaking at optical/UV. Until recently, transient mid-IR emission in the centers of galaxies has been discovered which can be best understood as dust echoes of nuclear flares, offering a new window to probe circumnuclear dust and gas, and even jet production. Using the data from WISE survey, we have identified a new galaxy with on-going mid-IR outburst, which is however completely silent in optical photometric observations, representing possibly the rare population of dust-enshrouded TDEs that are largely missed in previous surveys. By analyzing two-epoch VLASS observations spanning three years, we find a significant brightening of radio emission, perhaps associated with the formation of jet/outflow at its earliest phase since mid-IR outburst. We request timely multi-frequency EVN observations with the aim to precisely localize the radio emission, and probe the radio structure at a milliarcsecond scale, resolving jet-like/outflow components if present. The EVN observations will also provide accurate measurement of radio spectral slope which will help to understand the radio radiation mechanism associated with mid-IR outbursts.