dc.contributor.author | Tortora, C. | |
dc.contributor.author | Antonuccio-Delogu, V. | |
dc.contributor.author | Romeo, A.D. | |
dc.contributor.author | Becciani, U. | |
dc.contributor.author | Kaviraj, S. | |
dc.contributor.author | Silk, J. | |
dc.date.accessioned | 2013-10-31T14:00:59Z | |
dc.date.available | 2013-10-31T14:00:59Z | |
dc.date.issued | 2009-06-01 | |
dc.identifier.citation | Tortora , 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.issn | 0035-8711 | |
dc.identifier.other | ORCID: /0000-0002-5601-575X/work/77850204 | |
dc.identifier.uri | http://hdl.handle.net/2299/11947 | |
dc.description.abstract | We 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.extent | 17 | |
dc.format.extent | 823046 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.title | AGN jet-induced feedback in galaxies - II : Galaxy colours from a multicloud simulation | en |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | School of Physics, Engineering & Computer Science | |
dc.contributor.institution | Department of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Centre of Data Innovation Research | |
dc.description.status | Peer reviewed | |
dc.identifier.url | http://www.scopus.com/inward/record.url?scp=66549105966&partnerID=8YFLogxK | |
rioxxterms.versionofrecord | 10.1111/j.1365-2966.2009.14718.x | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |