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- Title
Large reservoirs of turbulent diffuse gas around high-z starburst galaxies.
- Authors
Falgarone, E.; Vidal-Garca, A.; Godard, B.; Zwaan, M. A.; Herrera, C.; Ivison, R. J.; Bergin, E.; Andreani, P. M.; Omont, A.; Walter, F.; da Cunha, Elisabete; Hodge, Jacqueline; Afonso, José; Pentericci, Laura; Sobral, David
- 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.
- Publication
Proceedings of the International Astronomical Union, 2020, Vol 15, Issue S352, p200
- ISSN
1743-9213
- Publication type
Article
- DOI
10.1017/S1743921320000836