Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/23645
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Goz, David | en_US |
dc.contributor.author | Monaco, Pierluigi | en_US |
dc.contributor.author | MURANTE, Giuseppe | en_US |
dc.contributor.author | CURIR, Anna | en_US |
dc.date.accessioned | 2020-03-27T16:05:37Z | - |
dc.date.available | 2020-03-27T16:05:37Z | - |
dc.date.issued | 2015 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/23645 | - |
dc.description | We thank Volker Springel who provided us with the non-public version of the gadget -3 code. We acknowledge useful discussions with Stefano Borgani, Gabriella De Lucia, Emiliano Munari and Marianna Annunziatella. The simulations were carried out at the ‘Centro Interuniversitario del Nord-Est per il Calcolo Elettronico’ (CINECA, Bologna), with CPU time assigned under University-of-Trieste/CINECA and ISCRA grants, and at the CASPUR computing centre with CPU time assigned under two standard grants. This work is supported by the PRIN MIUR 2010-2011 grant ‘The dark Universe and the cosmic evolution of baryons: from current surveys to Euclid’, by the PRIN-MIUR 2012 grant ‘Evolution of Cosmic Baryons’, by the PRIN-INAF 2012 grant ‘The Universe in a Box: Multi-scale Simulations of Cosmic Structures’, by the INFN ‘INDARK’ grant, by the European Com- missions FP7 Marie Curie Initial Training Network CosmoComp (PITN-GA-2009-238356), by the FRA2012 grant of the University of Trieste and by ‘Consorzio per la Fisica di Trieste’. | - |
dc.description.abstract | We present a quantification of the properties of bars in two N-body+ smoothed particle hydrodynamics cosmological simulations of spiral galaxies, named GA and AqC. The initial conditions were obtained using the zoom-in technique and represent two dark matter haloes of 2-3 × 10<SUP>12</SUP> M<SUB>☉</SUB>, available at two different resolutions. The resulting galaxies are presented in the companion paper of Murante et al. We find that the GA galaxy has a bar of length 8.8 kpc, present at the two resolution levels even though with a slightly different strength. Classical bar signatures (e.g. pattern of streaming motions, high m = 2 Fourier mode with roughly constant phase) are consistently found at both resolutions. Though a close encounter with a merging satellite at z ̃ 0.6 (mass ratio 1: 50) causes a strong, transient spiral pattern and some heating of the disc, we find that bar instability is due to secular process, caused by a low Toomre parameter Q ≲ 1 due to accumulation of mass in the disc. The AqC galaxy has a slightly different history: it suffers a similar tidal disturbance due to a merging satellite at z ̃ 0.5 but with a mass ratio of 1: 32, that triggers a bar in the high-resolution simulation, while at low resolution the merging is found to take place at a later time, so that both secular evolution and merging are plausible triggers for bar instability. | en_US |
dc.language.iso | eng | en_US |
dc.title | Properties of barred spiral discs in hydrodynamical cosmological simulations | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stu2557 | en_US |
dc.identifier.scopus | 2-s2.0-84922575880 | en_US |
dc.identifier.isi | 000350272900063 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/447/2/1774/2593774?searchresult=1 | en_US |
dc.identifier.url | https://arxiv.org/abs/1412.2883 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 447 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 1774 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | no | en_US |
dc.contributor.country | ITA | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2015MNRAS.447.1774G | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegherò il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Trieste | - |
crisitem.author.dept | O.A. Trieste | - |
crisitem.author.dept | O.A. Trieste | - |
crisitem.author.orcid | 0000-0001-9808-2283 | - |
crisitem.author.orcid | 0000-0003-2083-7564 | - |
crisitem.author.orcid | 0000-0002-5155-130X | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
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