X-Shooting ULLYSES: Massive Stars at Low Metallicity
Solar and Stellar Astrophysics2024-05-02v1Cosmology and Nongalactic AstrophysicsAstrophysics of GalaxiesHigh Energy Astrophysical PhenomenaInstrumentation and Methods for Astrophysics
The Hubble Space Telescope has devoted 500 orbits to observing 250 massive stars with low metallicity in the ultraviolet (UV) range within the framework of the ULLYSES program. The X-Shooting ULLYSES (XShootU) project enhances the legacy value of this UV dataset by providing high-quality optical and near-infrared spectra, which are acquired using the wide-wavelength-coverage X-shooter spectrograph at ESO's Very Large Telescope. XShootU emphasises the importance of combining UV with optical spectra for the consistent determination of key stellar parameters such as effective temperature, surface gravity, luminosity, abundances, and wind characteristics including mass-loss rates as a function of metallicity. Since uncertainties in these parameters have implications across various branches of astrophysics, the data and modelling generated by the XShootU project are poised to significantly advance our understanding of massive stars at low metallicity. This is particularly crucial for confidently interpreting JWST data of the earliest stellar generations, making XShootU a unique resource for comprehending individual spectra of low-metallicity stars.
@article{arxiv.2405.00085,
title = {X-Shooting ULLYSES: Massive Stars at Low Metallicity},
author = {Jorick S. Vink and Paul Crowther and Alex Fullerton and Miriam Garcia and Fabrice Martins and Nidia Morrell and Lida Oskinova and Nicole St. Louis and Asif ud-Doula and Andreas Sander and Hugues Sana and Jean-Claude Bouret and Brankica Kubatova and Pablo Marchant and Lucimara P. Martins and Aida Wofford and Jacco van Loon and O. Grace Telford and Ylva Götberg and Dominic Bowman and Christi Erba and Venu Kalari and The XShootU Collaboration},
journal= {arXiv preprint arXiv:2405.00085},
year = {2024}
}