Lyα generation in intermediate velocity shock waves. Issue Volume 15:Issue S352(2019) (June 2019)

• Record Type: Journal Article
• Authors: Lehmann, Andrew; Godard, Benjamin; Pineau des Forêts, Guillaume; Falgarone, Edith
• Editors: da Cunha, Elisabete; Hodge, Jacqueline; Afonso, José; Pentericci, Laura; Sobral, David
• Is Part Of: Proceedings of the International Astronomical Union. Volume 15:Issue S352(2019)
• Page Start: 73
• Page End: 74
• Publication Date: 2019-06
• Subjects: Lyα, -- shock waves, -- UV; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921320000654
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: We update the Paris-Durham shock model, a state-of-the-art magnetohydrodynamic (MHD) shock code developed with a focus on molecular chemistry, in order to account for the self-generated UV field produced in shocks at velocities in the range 25-50 km/s. In these shocks there is significant excitation of atomic Hydrogen, with a large flux of Ly α photons escaping ahead of the shock to heat, ionize and drive molecular chemistry in a large slab of preshock gas.