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Journal Articles Nature Astronomy Year : 2021

A titanic interstellar medium ejection from a massive starburst galaxy at redshift 1.4

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Annagrazia Puglisi
  • Function : Author
Emanuele Daddi
  • Function : Author
Marcella Brusa
  • Function : Author
Frederic Bournaud
  • Function : Author
Daizhong Liu
  • Function : Author
Ivan Delvecchio
  • Function : Author
Antonello Calabrò
  • Function : Author
Chiara Circosta
  • Function : Author
Francesco Valentino
  • Function : Author
Michele Perna
  • Function : Author
Shuowen Jin
  • Function : Author
Andrea Enia
  • Function : Author
Chiara Mancini
  • Function : Author
Giulia Rodighiero
  • Function : Author

Abstract

Feedback-driven winds from star formation or active galactic nuclei might be a relevant channel for the abrupt quenching of star formation in massive galaxies. However, both observations and simulations support the idea that these processes are non-conflictingly co-evolving and self-regulating. Furthermore, evidence of disruptive events that are capable of fast quenching is rare, and constraints on their statistical prevalence are lacking. Here we present a massive starburst galaxy at redshift z = 1.4, which is ejecting 46 ± 13% of its molecular gas mass at a startling rate of ≳10,000 M yr−1. A broad component that is red-shifted from the galaxy emission is detected in four (low and high J) CO and [C I] transitions and in the ionized phase, which ensures a robust estimate of the expelled gas mass. The implied statistics suggest that similar events are potentially a major star-formation quenching channel. However, our observations provide compelling evidence that this is not a feedback-driven wind, but rather material from a merger that has been probably tidally ejected. This finding challenges some literature studies in which the role of feedback-driven winds might be overstated.

Dates and versions

insu-03711508 , version 1 (01-07-2022)

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Annagrazia Puglisi, Emanuele Daddi, Marcella Brusa, Frederic Bournaud, Jeremy Fensch, et al.. A titanic interstellar medium ejection from a massive starburst galaxy at redshift 1.4. Nature Astronomy, 2021, 5, pp.319-330. ⟨10.1038/s41550-020-01268-x⟩. ⟨insu-03711508⟩
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