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dc.contributor.authorDavis, Timothy A.
dc.contributor.authorvan de Voort, Freeke
dc.contributor.authorRowlands, Kate
dc.contributor.authorMcAlpine, Stuart
dc.contributor.authorWild, Vivienne
dc.contributor.authorCrain, Robert A.
dc.identifier.citationDavis , T A , van de Voort , F , Rowlands , K , McAlpine , S , Wild , V & Crain , R A 2019 , ' Evolution of the cold gas properties of simulated post-starburst galaxies ' , Monthly Notices of the Royal Astronomical Society , vol. 484 , no. 2 , pp. 2447-2461 .
dc.identifier.otherPURE: 258040751
dc.identifier.otherPURE UUID: d0c04fd2-52a4-4615-8b96-b4348a9f5bea
dc.identifier.otherBibCode: 2019MNRAS.484.2447D
dc.identifier.otherScopus: 85062863553
dc.identifier.otherWOS: 000462302600070
dc.description.abstractPost-starburst galaxies are typically considered to be a transition population, en route to the red sequence after a recent quenching event. Despite this, recent observations have shown that these objects typically have large reservoirs of cold molecular gas. In this paper we study the star-forming gas properties of a large sample of post-starburst galaxies selected from the cosmological, hydrodynamical EAGLE simulations. These objects resemble observed high-mass post-starburst galaxies both spectroscopically and in terms of their space density, stellar mass distribution, and sizes. We find that the vast majority of simulated post-starburst galaxies have significant gas reservoirs, with star-forming gas masses ≈109 M⊙, in good agreement with those seen in observational samples. The simulation reproduces the observed time evolution of the gas fraction of the post-starburst galaxy population, with the average galaxy losing ≈90 per cent of its star-forming interstellar medium in only ≈600 Myr. A variety of gas consumption/loss processes are responsible for this rapid evolution, including mergers and environmental effects, while active galactic nuclei play only a secondary role. The fast evolution in the gas fraction of post-starburst galaxies is accompanied by a clear decrease in the efficiency of star formation due to a decrease in the dense gas fraction. We predict that forthcoming ALMA observations of the gas reservoirs of low-redshift post-starburst galaxies will show that the molecular gas is typically compact and has disturbed kinematics, reflecting the disruptive nature of many of the evolutionary pathways that build up the post-starburst galaxy population.
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.rights© 2019, the Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. This work has been made available online in accordance with the publisher's policies. This is the final published version of the work, which was originally published at
dc.subjectGalaxies: evolutionen
dc.subjectGalaxies: interactionsen
dc.subjectGalaxies: ISMen
dc.subjectGalaxies: kinematics and dynamicsen
dc.subjectGalaxies: starbursten
dc.subjectGalaxies: star formationen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleEvolution of the cold gas properties of simulated post-starburst galaxiesen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.description.statusPeer revieweden

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