# X-ray emission in the enigmatic CVSO 30 system

## TL;DR

This study analyzes X-ray data from multiple observatories to understand the coronal emission of CVSO 30, a young star with potential planetary companions, revealing its X-ray luminosity, flare activity, and implications for planetary evaporation.

## Contribution

First detailed X-ray analysis of CVSO 30, providing insights into its coronal activity and the evaporation potential of its hot-Jupiter candidate.

## Key findings

- CVSO 30 has a quiescent X-ray luminosity of ~8e29 erg/s.
- XMM-Newton detected a flare but no transit-related X-ray flux variation.
- The hot-Jupiter candidate's evaporation lifetime exceeds the system's age.

## Abstract

CVSO 30 is a young, active, weak-line T Tauri star; it possibly hosts the only known planetary system with both a transiting hot-Jupiter and a cold-Jupiter candidate (CVSO 30 b and c). We analyzed archival ROSAT, Chandra, and XMM-Newton data to study the coronal emission in the system. According to our modeling, CVSO 30 shows a quiescent X-ray luminosity of about 8e29 erg/s. The X-ray absorbing column is consistent with interstellar absorption. XMM-Newton observed a flare, during which a transit of the candidate CVSO 30 b was expected, but no significant transit-induced variation in the X-ray flux is detectable. While the hot-Jupiter candidate CVSO 30 b has continuously been undergoing mass loss powered by the high-energy irradiation, we conclude that its evaporation lifetime is considerably longer than the estimated stellar age of 2.6 Myr.