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Perez, J.; Valenzuela, O.; Tissera, P.B.; Michel-Dansac, L. "Clumpy disc and bulge formation" (2013) Monthly Notices of the Royal Astronomical Society. 436(1):259-265
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Abstract:

We present a set of hydrodynamical/N-body controlled simulations of isolated gas-rich galaxies that self-consistently include supernova (SN) feedback and a detailed chemical evolution model, both tested in cosmological simulations. The initial conditions are motivated by the observed star-forming galaxies at z̃2-3.We find that the presence of a multiphase interstellar media in our models promotes the growth of disc instability favouring the formation of clumps which, in general, are not easily disrupted on time-scales compared to the migration time. We show that stellar clumps migrate towards the central region and contribute to form a classicallike bulge with a Séersic index, n>2. Our physically motivated SNfeedback has a mild influence on clump survival and evolution, partially limiting the mass growth of clumps as the energy released per SN event is increased, with the consequent flattening of the bulge profile. This regulation does not prevent the building of a classical-like bulge even for the most energetic feedback tested. Our SN feedback model is able to establish self-regulated star formation, producing mass-loaded outflows and stellar age spreads comparable to observations. We find that the bulge formation by clumps may coexist with other channels of bulge assembly such as bars and mergers. Our results suggest that galactic bulges could be interpreted as composite systems with structural components and stellar populations storing archaeological information of the dynamical history of their galaxy. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.

Registro:

Documento: Artículo
Título:Clumpy disc and bulge formation
Autor:Perez, J.; Valenzuela, O.; Tissera, P.B.; Michel-Dansac, L.
Filiación:Instituto de Astronomía y Física del Espacio, Conicet-UBA, CC67, Suc. 28, 1428 Ciudad de Buenos Aires, Argentina
Cátedra de Astronomía Estelar, Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, La Plata, CP 1900, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Ciudad de Buenos Aires CP 1033, Argentina
Instituto de Astronomi ́a, Universidad Nacional Autónoma de México, A.P 70-264 04510, Mexico, D.F., Mexico
Université de Lyon, F-69003 Lyon, France
Université Lyon 1, Observatoire de Lyon, 9 avenue Charles André, F-69230 Saint-Genis Laval, France
CNRS, UMR 5574, Centre de Recherche Astrophysique de Lyon, F-69007 Lyon, France
Palabras clave:Galaxies: bulges; Galaxies: evolution; Galaxies: formation Galaxies: interactions.
Año:2013
Volumen:436
Número:1
Página de inicio:259
Página de fin:265
DOI: http://dx.doi.org/10.1093/mnras/stt1563
Título revista:Monthly Notices of the Royal Astronomical Society
Título revista abreviado:Mon. Not. R. Astron. Soc.
ISSN:00358711
CODEN:MNRAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v436_n1_p259_Perez

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Citas:

---------- APA ----------
Perez, J., Valenzuela, O., Tissera, P.B. & Michel-Dansac, L. (2013) . Clumpy disc and bulge formation. Monthly Notices of the Royal Astronomical Society, 436(1), 259-265.
http://dx.doi.org/10.1093/mnras/stt1563
---------- CHICAGO ----------
Perez, J., Valenzuela, O., Tissera, P.B., Michel-Dansac, L. "Clumpy disc and bulge formation" . Monthly Notices of the Royal Astronomical Society 436, no. 1 (2013) : 259-265.
http://dx.doi.org/10.1093/mnras/stt1563
---------- MLA ----------
Perez, J., Valenzuela, O., Tissera, P.B., Michel-Dansac, L. "Clumpy disc and bulge formation" . Monthly Notices of the Royal Astronomical Society, vol. 436, no. 1, 2013, pp. 259-265.
http://dx.doi.org/10.1093/mnras/stt1563
---------- VANCOUVER ----------
Perez, J., Valenzuela, O., Tissera, P.B., Michel-Dansac, L. Clumpy disc and bulge formation. Mon. Not. R. Astron. Soc. 2013;436(1):259-265.
http://dx.doi.org/10.1093/mnras/stt1563