Three epochs of EVN observations towards IRAS 23365+3604

TL;DR

This study uses three epochs of EVN radio observations to investigate the nuclear regions of the ULIRG IRAS 23365+3604, aiming to estimate star formation rates through core-collapse supernova detections.

Contribution

First EVN multi-epoch observations of IRAS 23365+3604 to detect supernovae and estimate star formation rates in ULIRGs.

Findings

Detected radio sources consistent with supernovae

Provided constraints on star formation rate in IRAS 23365+3604

Demonstrated EVN's capability for monitoring ULIRGs

Abstract

The European VLBI Network (EVN) provides us with the necessary sensitivity and angular resolution to study the nuclear and circumnuclear regions in Luminous and Ultraluminous Infrared Galaxies. The high Star Formation Rates (SFR) inferred for these galaxies implies both the presence of a high number of massive stars and a dense surrounding medium. Therefore, bright radio SNe are expected to occur. With the aim of estimating the SFR in ULIRGs by means of Core Collapse supernova (CCSN) detections, we started an observing campaign with the EVN on a small sample of the brightest and farthest ULIRGs in the local Universe. We present here our results from three epochs of quasi-simultaneous observations with the EVN at 6 and 18 cm towards one of the objects in our sample: IRAS 23365+3604.