Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/31772
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Zanisi, Lorenzo | en_US |
dc.contributor.author | Shankar, Francesco | en_US |
dc.contributor.author | Lapi, Andrea | en_US |
dc.contributor.author | MENCI, Nicola | en_US |
dc.contributor.author | Bernardi, Mariangela | en_US |
dc.contributor.author | Duckworth, Christopher | en_US |
dc.contributor.author | Huertas-Company, Marc | en_US |
dc.contributor.author | Grylls, Philip | en_US |
dc.contributor.author | Salucci, Paolo | en_US |
dc.date.accessioned | 2022-03-22T12:37:44Z | - |
dc.date.available | 2022-03-22T12:37:44Z | - |
dc.date.issued | 2020 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/31772 | - |
dc.description.abstract | The mass and structural assembly of galaxies is a matter of intense debate. Current theoretical models predict the existence of a linear relationship between galaxy size (R<SUB>e</SUB>) and the host dark matter halo virial radius (R<SUB>h</SUB>). By making use of semi-empirical models compared to the size distributions of central galaxies from the Sloan Digital Sky Survey, we provide robust constraints on the normalization and scatter of the R<SUB>e</SUB>-R<SUB>h</SUB> relation. We explore the parameter space of models in which the R<SUB>e</SUB>-R<SUB>h</SUB> relation is mediated by either the spin parameter or the concentration of the host halo, or a simple constant the nature of which is in principle unknown. We find that the data require extremely tight relations for both early-type and late-type galaxies (ETGs, LTGs), especially for more massive galaxies. These constraints challenge models based solely on angular momentum conservation, which predict significantly wider distributions of galaxy sizes and no trend with stellar mass, if taken at face value. We discuss physically motivated alterations to the original models that bring the predictions into better agreement with the data. We argue that the measured tight size distributions of SDSS disc galaxies can be reproduced by semi-empirical models in which the R<SUB>e</SUB>-R<SUB>h</SUB> connection is mediated by the stellar specific angular momenta j<SUB>star</SUB>. We find that current cosmological models of galaxy formation broadly agree with our constraints for LTGs, and justify the strong link between R<SUB>e</SUB> and j<SUB>star</SUB> that we propose, however the tightness of the R<SUB>e</SUB>-R<SUB>h</SUB> relation found in such ab initio theoretical models for ETGs is in tension with our semi-empirical findings. | en_US |
dc.language.iso | eng | en_US |
dc.title | Galaxy sizes and the galaxy-halo connection - I. The remarkable tightness of the size distributions | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stz3516 | en_US |
dc.identifier.scopus | 2-s2.0-85082659391 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/492/2/1671/5679148?login=true | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 492 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 1671 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | USA | en_US |
dc.contributor.country | GBR | 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 | 2020MNRAS.492.1671Z | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_8 Formation and evolution of galaxies | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare 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. Roma | - |
crisitem.author.orcid | 0000-0002-4096-2680 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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czC6JU-stz3516.pdf | Pdf editoriale | 2.89 MB | Adobe PDF | View/Open |
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