First detection and modelling of spatially resolved Lyα in TW Hya

Seok-Jun-Chang , Nicole Arulanantham , Max Gronke , Gregory J Herczeg , Edwin A Bergin

Abstract

ABSTRACT Lyman-α (Lyα) is the strongest emission line in the accretion-generated ultraviolet spectra from T Tauri stars and, as such, plays a critical role in regulating chemistry within the surrounding protoplanetary discs. Due to its resonant nature, the scatteri...