# The imprint of X-ray photoevaporation of planet-forming discs on the orbital distribution of giant planets

## TL;DR

This study investigates how X-ray radiation from host stars influences the orbital distribution of giant planets, suggesting a possible impact of photoevaporation on planetary migration, though current data is limited.

## Contribution

The paper introduces a catalog of stellar X-ray luminosities for stars with giant planets and explores its application to understanding planetary orbital distributions.

## Key findings

- Identified a potential void in the semi-major axis vs. X-ray luminosity plane.
- Suggests X-ray photoevaporation may influence planetary migration.
- Sample size limits statistical significance of findings.

## Abstract

High energy radiation from a planet host star can have strong influence on the final habitability of a system through several mechanisms. In this context we have constructed a catalogue containing the X-ray luminosities, as well as basic stellar and planetary properties of all known stars hosting giant planets (> 0.1 Mjup) that have been observed by the Chandra X-ray Observatory, XMM-Newton and/or ROSAT. Specifically in this paper we present a first application of this catalogue to search for a possible imprint of X-ray photoevaporation of planet-forming discs on the present-day orbital distribution of the observed giant planets. We found a suggestive void in the semi-major axis, a, versus X-ray luminosity, Lx, plane, roughly located between a ~ 0.05-1 au and Lx ~10^27-10^29 erg/s, which would be expected if photoevaporation played a dominant role in the migration history of these systems. However, due to the small observational sample size, the statistical significance of this feature cannot be proven at this point.