DOI

https://doi.org/10.48717/a6wd-m737

Project

ES099

Title

ES099A

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 galactic centers 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 WISE survey data, we have identified a new galaxy with long-lasting mid-IR outburst, for which the post-peak mid-IR emission is declining for at least seven years. By analyzing two-epoch VLASS observations spanning three years, we find unambiguous evidence of transient radio emission. If explained due to jet/outflow associated with mid-IR outburst, the radio emission must last for a decade, which has rarely been observed in TDEs. We request dual-frequency EVN observations to precisely localize the radio emission, and probe the radio structure at a milliarcsecond scale, resolving jet-like components if present. The EVN observations will also enable to measure radio spectral slope, which will help to constrain the origin of long-lasting radio radiation associated with the mid-IR outburst.