# Perspectives for observing hot massive stars with XMM-Newton in the years 2017 -- 2027

## TL;DR

XMM-Newton has significantly advanced our understanding of X-ray emissions from hot, massive stars, revealing new features and physics, with future prospects focusing on coordinated multi-wavelength observations and synergies with other observatories.

## Contribution

This paper reviews 15 years of XMM-Newton observations of massive stars and discusses future observational strategies and collaborations to further understand their X-ray emission physics.

## Key findings

- Revealed unexpected features in stellar wind dynamics.
- Enhanced understanding of magnetic fields in massive stars.
- Highlighted the importance of multi-wavelength and coordinated observations.

## Abstract

XMM-Newton has deeply changed our picture of X-ray emission of hot, massive stars. High-resolution X-ray spectroscopy as well as monitoring of these objects helped us gain a deeper insight into the physics of single massive stars with or without magnetic fields, as well as of massive binary systems, where the stellar winds of both stars interact. These observations also revealed a number of previously unexpected features that challenge our understanding of the dynamics of the stellar winds of massive stars. I briefly summarize the results obtained over the past 15 years and highlight the perspectives for the next decade. It is anticipated that coordinated (X-ray and optical or UV) monitoring and time-critical observations of either single or binary massive stars will become the most important topics in this field over the coming years. Synergies with existing or forthcoming X-ray observatories (NuSTAR, Swift, eROSITA) will also play a major role and will further enhance the importance of XMM-Newton in our quest for understanding the physics of hot, massive stars.