# The influence of eclipses in the stellar radio emission

## TL;DR

This paper simulates how planetary transits affect stellar radio emission, revealing that active regions can significantly increase transit depth at radio wavelengths, which is crucial for interpreting radio observations of exoplanets.

## Contribution

It introduces a simulation framework for planetary transits at radio wavelengths, incorporating stellar activity and limb brightening effects, which is a novel approach.

## Key findings

- Transit depth can reach ~2% over active regions.
- Active regions significantly influence radio transit signals.
- Radio transit signatures depend on stellar activity and limb brightening.

## Abstract

Here we simulate the shape of a planetary transit observed at radio wavelengths. The simulations use a light curve of the K4 star HAT-P-11 and its hot Jupiter companion as proxy. From the HAT-P-11 optical light curve, a prominent spot was identified (1.10 Rp and 0.6 Ic). On the radio regime, the limb brighting of 30% was simulated by a quadratic function, and the active region was assumed to have the same size of the optical spot. Considering that the planet size is 6.35% of the the stellar radius, for the quiet star regions the transit depth is smaller than 0.5%, however, this value can increase to ~2% when covering an active region with 5.0 times the quiet star brightness temperature.