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Lyα generation in intermediate velocity shock waves

Published online by Cambridge University Press:  04 June 2020

Andrew Lehmann Open the ORCID record for Andrew Lehmann [Opens in a new window] ,
Benjamin Godard ,
Guillaume Pineau des Forêts  and
Edith Falgarone
Andrew Lehmann
Affiliation:
ENS, Université PSL, CNRS, Sorbonne Université, Paris, France
Benjamin Godard
Affiliation:
ENS, Université PSL, CNRS, Sorbonne Université, Paris, France LERMA, Observatoire de Paris, France email: [email protected]
Guillaume Pineau des Forêts
Affiliation:
LERMA, Observatoire de Paris, France email: [email protected]
Edith Falgarone
Affiliation:
ENS, Université PSL, CNRS, Sorbonne Université, Paris, France
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Abstract

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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 Lyα photons escaping ahead of the shock to heat, ionize and drive molecular chemistry in a large slab of preshock gas.

Keywords

Lyαshock wavesUV
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S352: Uncovering Early Galaxy Evolution in the ALMA and JWST Era , June 2019 , pp. 73 - 74
Copyright
© International Astronomical Union 2020

References

Falgarone, E., Zwaan, M. A., Godard, B., et al. 2017, Nature, 548, 430CrossRefGoogle Scholar
Flower, D. R. & Pineau des Forêts, G. 2015, A&A, 578, A63Google Scholar
Godard, B., Pineau des Forêts, G., Lesaffre, P., et al. 2019, A&A, 622, A100Google Scholar
Lesaffre, P., Pineau des Forêts, G., Godard, B., et al. 2013, A&A, 550, 106Google Scholar