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dc.contributor.authorTortora, C.
dc.contributor.authorAntonuccio-Delogu, V.
dc.contributor.authorRomeo, A.D.
dc.contributor.authorBecciani, U.
dc.contributor.authorKaviraj, S.
dc.contributor.authorSilk, J.
dc.date.accessioned2013-10-31T14:00:59Z
dc.date.available2013-10-31T14:00:59Z
dc.date.issued2009-06-01
dc.identifier.citationTortora , C , Antonuccio-Delogu , V , Romeo , A D , Becciani , U , Kaviraj , S & Silk , J 2009 , ' AGN jet-induced feedback in galaxies - II : Galaxy colours from a multicloud simulation ' Monthly Notices of the Royal Astronomical Society , vol. 396 , no. 1 , pp. 61-77 . https://doi.org/10.1111/j.1365-2966.2009.14718.x
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 2065865
dc.identifier.otherPURE UUID: c90a5968-d4e3-49d9-a357-cc4842ff4e16
dc.identifier.otherScopus: 66549105966
dc.identifier.urihttp://hdl.handle.net/2299/11947
dc.description.abstractWe study the feedback from an active galactic nucleus (AGN) on stellar formation within its host galaxy, mainly using one high-resolution numerical simulation of the jet propagation within the interstellar medium (ISM) of an early-type galaxy (ETG). In particular, we show that in a realistic simulation where the jet propagates into a two-phase ISM, star formation (SF) can initially be slightly enhanced and then, on time-scales of few million years, rapidly quenched, as a consequence both of the high temperatures attained and of the reduction of cloud mass (mainly due to Kelvin-Helmholtz instabilities). We then introduce a model of (prevalently) negative AGN feedback, where an exponentially declining star formation is quenched, on a very short time-scale, at a time t , due to AGN feedback. Using the Bruzual and Charlot population synthesis model and our SF history, we predict galaxy colours from this model and match them to a sample of nearby ETGs showing signs of recent episodes of SF, see Kaviraj et al. We find that the quantity t -t , where t is the galaxy age, is an excellent indicator of the presence of feedback processes, and peaks significantly around t -t ≈ 0.85 Gyr for our sample, consistent with feedback from recent energy injection by AGNs in relatively bright (M ≲ -19) and massive nearby ETGs. Galaxies that have experienced this recent feedback show an enhancement of 3 mag in NUV (GALEX) - g, with respect to the unperturbed, no-feedback evolution. Hence, they can be easily identified in large combined near UV-optical surveys.en
dc.format.extent17
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rights/dk/atira/pure/core/openaccesspermission/open
dc.titleAGN jet-induced feedback in galaxies - II : Galaxy colours from a multicloud simulationen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=66549105966&partnerID=8YFLogxK
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeSubmitted Version
rioxxterms.versionSMUR
rioxxterms.versionofrecordhttps://doi.org/10.1111/j.1365-2966.2009.14718.x
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstyperestrictedAccess


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