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http://hdl.handle.net/20.500.12386/26194
Titolo: | The fate of high-redshift massive compact galaxies | Autori: | de la Rosa, Ignacio G. LA BARBERA, Francesco Ferreras, Ignacio Sánchez Almeida, Jorge Dalla Vecchia, Claudio Martínez-Valpuesta, Inma Stringer, Martin |
Data pubblicazione: | 2016 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 457 | Fascicolo: | 2 | Da pagina:: | 1916 | Abstract: | Massive high-redshift quiescent compact galaxies (nicknamed red nuggets) have been traditionally connected to present-day elliptical galaxies, often overlooking the relationships that they may have with other galaxy types. We use large bulge-disc decomposition catalogues based on the Sloan Digital Sky Survey to check the hypothesis that red nuggets have survived as compact cores embedded inside the haloes or discs of present-day massive galaxies. In this study, we designate a compact core as the bulge component that satisfies a prescribed compactness criterion. Photometric and dynamic mass-size and mass-density relations are used to show that, in the inner regions of galaxies at z ∼ 0.1, there are abundant compact cores matching the peculiar properties of the red nuggets, an abundance comparable to that of red nuggets at z ∼ 1.5. Furthermore, the morphology distribution of the present-day galaxies hosting compact cores is used to demonstrate that, in addition to the standard channel connecting red nuggets with elliptical galaxies, a comparable fraction of red nuggets might have ended up embedded in discs. This result generalizes the inside-out formation scenario; present-day massive galaxies can begin as dense spheroidal cores (red nuggets), around which either a spheroidal halo or a disc is formed later. | URI: | http://hdl.handle.net/20.500.12386/26194 | URL: | https://academic.oup.com/mnras/article/457/2/1916/971590 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stw130 | Bibcode ADS: | 2016MNRAS.457.1916D | Fulltext: | open |
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