Tootfinder

H3 in irradiated protoplanetary disks: Linking far-ultraviolet radiation and hot water vapor
Javier R. Goicoechea, Octavio Roncero, Evelyne Roueff, John H. Black, Ilane Schroetter, Olivier Bern\'e
https://arxiv.org/abs/2506.05189

H3+ in irradiated protoplanetary disks: Linking far-ultraviolet radiation and hot water vapor
The likely JWST detection of vibrationally excited H3+ emission in the irradiated disk d203-506, reported by Schroetter et al., raises the question of whether cosmic-ray ionization is enhanced in disks within clustered star-forming regions, or if alternative mechanisms contribute to H3+ formation and excitation. We present a detailed model of the photodissociation region (PDR) component of a protoplanetary disk-comprising the outer disk surface and the photoevaporative wind-exposed to strong ex…