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Proceedings of the International Astronomical Union Proceedings of the International Astronomical Union

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Large reservoirs of turbulent diffuse gas around high-z starburst galaxies

Published online by Cambridge University Press:  04 June 2020

E. Falgarone [Opens in a new window] ,
A. Vidal-Garca ,
B. Godard ,
M. A. Zwaan ,
C. Herrera ,
R. J. Ivison ,
E. Bergin ,
P. M. Andreani ,
A. Omont  and
F. Walter
E. Falgarone
Affiliation:
Laboratoire de Physique de l’ENS, ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris, 24 rue Lhomond, 75005 Paris, France email: edith.falgarone@ens.fr
A. Vidal-Garca
Affiliation:
Laboratoire de Physique de l’ENS, ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris, 24 rue Lhomond, 75005 Paris, France email: edith.falgarone@ens.fr
B. Godard
Affiliation:
Laboratoire de Physique de l’ENS, ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris, 24 rue Lhomond, 75005 Paris, France email: edith.falgarone@ens.fr LERMA, Observatoire de Paris, CNRS, 61 avenue de l’Observatoire, 75014 Paris, France
M. A. Zwaan
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Strasse 2, 85748 Garching, Germany
C. Herrera
Affiliation:
IRAM, 300 rue de la Piscine, Domaine universitaire, 38406 Saint Martin d’Hères, France
R. J. Ivison
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Strasse 2, 85748 Garching, Germany
E. Bergin
Affiliation:
University of Michigan, 311 West Hall, 1085 S. University Ave, Ann Arbor, MI 48109, USA
P. M. Andreani
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Strasse 2, 85748 Garching, Germany
A. Omont
Affiliation:
UMPC Université Paris 6 & Institut d’Astrophysique de Paris, CNRS, 75014 Paris, France
F. Walter
Affiliation:
Max Planck Institute für Astronomie, Heidelberg, Germany
Corresponding
E-mail address:
edith.falgarone@ens.fr
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Abstract

Starburst galaxies at z ∼ 2 – 4 are among the most intensely star-forming galaxies in the universe. The way they accrete their gas to form stars at such high rates is still a controversial issue. ALMA has detected the CH+ (J = 1-0) line in emission and/or absorption in all the gravitationally lensed starburst galaxies targeted so far at z ∼ 3. Its unique spectroscopic and chemical properties enable CH+ to highlight the sites of most intense dissipation of mechanical energy. The absorption lines reveal highly turbulent, massive reservoirs of low-density molecular gas. The broad emission lines, arising in myriad UV-irradiated molecular shocks, reveal powerful galactic winds. The CH+ lines therefore probe the fate of prodigious energy releases, due to infall and/or outflows, and primarily stored in turbulence before being radiated by cool molecular gas. The turbulent reservoirs act as mass and energy buffers over the duration of the starburst phase.

Keywords

galaxies: starburst galaxies: high-redshift galaxies: ISM galaxies: formation intergalactic medium turbulence shock waves
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. 200 - 204
Copyright
© International Astronomical Union 2020

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