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dc.contributor.author
Scannapieco, Cecilia
dc.contributor.author
Tissera, Patricia Beatriz
dc.date.available
2017-08-11T14:19:40Z
dc.date.issued
2003-02
dc.identifier.citation
Scannapieco, Cecilia; Tissera, Patricia Beatriz; The effects of mergers on the formation of disc-bulge systems in hierarchical clustering scenarios; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 338; 4; 2-2003; 880-890
dc.identifier.issn
0035-8711
dc.identifier.uri
http://hdl.handle.net/11336/22158
dc.description.abstract
We study the effects of mergers on the structural properties of disc-like systems by using smooth particle hydrodynamical (SPH) numerical simulations in hierarchical clustering scenarios. In order to assess the effects of mergers on the mass distributions we performed a bulge—disc decomposition of the projected surface density of the systems at different stages of the merger process. We assumed an exponential law for the disc component and the Sérsic law for the bulges. We found that simulated objects at z= 0 have bulge profiles with shape parameters n≈ 1, consistent with observational results of spiral galaxies. The complete sample of simulated objects at z= 0 and z > 0 shows that n takes values in the range n≈ 0.4–4. We found that secular evolution tends to produce exponential bulge profiles, while the fusion of baryonic cores tends to increase the n value and helps to generate the correlation between B/D and n. We found no dependence on the relative mass of the colliding objects. Our results suggest that mergers, through secular evolution and fusions, could produce the transformation of galactic objects along the Hubble sequence by driving a morphological loop that might also depend on the properties of the central galactic potential wells, which are also affected by mergers.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Oxford University Press
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Methods; Numerical
dc.subject
Galaxies: Evolution
dc.subject
Galaxies: Structural Parameters
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Galaxies: Interactions
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
The effects of mergers on the formation of disc-bulge systems in hierarchical clustering scenarios
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-08-10T14:07:22Z
dc.journal.volume
338
dc.journal.number
4
dc.journal.pagination
880-890
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Scannapieco, Cecilia. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.description.fil
Fil: Tissera, Patricia Beatriz. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.journal.title
Monthly Notices of the Royal Astronomical Society
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://mnras.oxfordjournals.org/content/338/4/880
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1046/j.1365-8711.2003.06133.x
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