Predicting photospheric UV emission from stellar evolutionary models

• DOI: 10.48550/arxiv.2410.11611
• Publication Date: 2024-10-15
• Authors: Song Wang; Xue Li; Henggeng Han; Jifeng Liu

Stellar ultraviolet (UV) emission serves as a crucial indicator for estimating magnetic activity and evaluating the habitability of exoplanets orbiting stars. In this paper, we present straightforward method to derive stellar photospheric UV F M main-sequence By using PARSEC models, establish relations between near-UV (NUV) far-UV (FUV) magnitudes from Galaxy Evolution Explorer (GALEX), NUV China Space Station Telescope, effective temperatures Gaia BP$-$RP color different metallicities. Together with observed sample, find that emission, contribution flux is less than 20% stars, around 10% 70% G ranges 30% 85% For FUV $10^{-6}$ below $10^{-4}$ K 6% 50% Our work enables simple determination excess exploration activity.