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dc.contributor.author
Gargiulo, Ignacio Daniel
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dc.contributor.author
Monachesi, Antonela
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dc.contributor.author
Gómez, Facundo Ariel
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dc.contributor.author
Nelson, Dylan
dc.contributor.author
Pillepich, Annalisa
dc.contributor.author
Pakmor, Rüdiger
dc.contributor.author
Grand, R. J. J.
dc.contributor.author
Fragkoudi, Francesca
dc.contributor.author
Hernquist, Lars
dc.contributor.author
Lovell, Mark
dc.contributor.author
Marinacci, Federico
dc.date.available
2023-09-08T12:59:46Z
dc.date.issued
2022-05
dc.identifier.citation
Gargiulo, Ignacio Daniel; Monachesi, Antonela; Gómez, Facundo Ariel; Nelson, Dylan; Pillepich, Annalisa; et al.; High and low Sérsic index bulges in Milky Way- and M31-like galaxies: origin and connection to the bar with TNG50; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 512; 2; 5-2022; 2537-2555
dc.identifier.issn
0035-8711
dc.identifier.uri
http://hdl.handle.net/11336/210898
dc.description.abstract
We study bulge formation in MW/M31-like galaxies in a Λ-cold dark matter scenario, focusing on the origin of high- and low-Sersic index bulges. For this purpose, we use TNG50, a simulation of the IllustrisTNG project that combines a resolution of ∼8 × 104 M⊙ in stellar particles with a cosmological volume 52 cMpc in extent. We parametrize bulge surface brightness profiles by the Sérsic index and the bulge-to-total (B/T) ratio obtained from two-component photometric decompositions. In our sample of 287 MW/M31-like simulated galaxies, 17.1 per cent of photometric bulges exhibit high-Sérsic indices and 82.9 per cent show low-Sérsic indices. We study the impact that the environment, mergers and bars have in shaping the surface brightness profiles. We find no correlation between bulge properties and the environment where they reside. Simulated galaxies with higher Sérsic indices show, on average, a higher fraction of ex situ stars in their kinematically selected bulges. For this bulge population, the last significant merger (total mass ratio msat/mhost > 0.1) occurs, on average, at later times. However, a substantial fraction of low-Sérsic index bulges also experience a late significant merger. We find that bars play an important role in the development of the different types of photometric bulges. The fraction of simulated galaxies with bars is smaller for the high- than for the low-Sérsic index population, reaching differences of 20 per cent at z > 1. Simulated galaxies with high fractions of ex situ stars in the bulge do not develop strong bars. Conversely, simulated galaxies with long-lived strong bars have bulges with ex situ fractions, fex situ < 0.2.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
GALAXIES: BAR
dc.subject
GALAXIES: BULGES
dc.subject
METHODS: NUMERICAL
dc.subject.classification
Astronomía
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
High and low Sérsic index bulges in Milky Way- and M31-like galaxies: origin and connection to the bar with TNG50
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-09-05T18:05:12Z
dc.journal.volume
512
dc.journal.number
2
dc.journal.pagination
2537-2555
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Gargiulo, Ignacio Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
dc.description.fil
Fil: Monachesi, Antonela. Universidad de La Serena; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
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Fil: Gómez, Facundo Ariel. Universidad de La Serena; Chile
dc.description.fil
Fil: Nelson, Dylan. Ruprecht Karls Universitat Heidelberg; Alemania
dc.description.fil
Fil: Pillepich, Annalisa. No especifíca;
dc.description.fil
Fil: Pakmor, Rüdiger. Gobierno de la República Federal de Alemania. Max Planck Institut für Astrophysik; Alemania
dc.description.fil
Fil: Grand, R. J. J.. Gobierno de la República Federal de Alemania. Max Planck Institut für Astrophysik; Alemania. Universidad de La Laguna; España
dc.description.fil
Fil: Fragkoudi, Francesca. No especifíca;
dc.description.fil
Fil: Hernquist, Lars. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Lovell, Mark. University of Iceland; Islandia
dc.description.fil
Fil: Marinacci, Federico. Universidad de Bologna; Italia
dc.journal.title
Monthly Notices of the Royal Astronomical Society
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/mnras/stac629
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