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Título: | Shape and kinematics of elliptical galaxies: evolution due to merging at z < 1.5 |
Autor: | González-García, A. César CSIC ORCID ; Oñorbe, J.; Domínguez-Tenreiro, R.; Gómez-Flechoso, M. A. | Palabras clave: | Galaxies: elliptical and lenticular, cD Galaxies: fundamental parameters Galaxies: interactions Galaxies: evolution Galaxies: formation Galaxy: kinematics and dynamics Incipit Instituto de Ciencias del Patrimonio Institute of Heritage Sciences |
Fecha de publicación: | 1-abr-2009 | Editor: | EDP Sciences | Citación: | Astronomy & Astrophysics, 497 (1): 35-40. | Resumen: | [EN]Aims. We investigate the evolution in the shape and kinematics of elliptical galaxies in a cosmological framework. Methods. We identified relaxed, elliptical-like objects (ELOs) at redshifts z = 0, z = 0.5, z = 1 and z = 1.5 within a set of hydrodynamic, self-consistent simulations completed for a concordance cosmological model. Results. The population of elliptical systems that we analysed evolve systematically with time becoming rounder in general by z = 0 and also more velocity dispersion supported. We found that this is due primarily to major dry mergers where only a modest amount of angular momentum is involved in the merger event. Despite the general trend, in a significant number of cases the merger event involves a relatively high amount of specific angular momentum, which causes the system in general to acquire higher rotational support and/or a more oblate shape. These evolutionary patterns persist when we study our systems in projection, in simulating true observations, and thus should be evident in future observations. | Versión del editor: | http://dx.doi.org/10.1051/0004-6361/200811452 | URI: | http://hdl.handle.net/10261/75153 | DOI: | 10.1051/0004-6361/200811452 | ISSN: | 0004-6361 | E-ISSN: | 1432-0746 |
Aparece en las colecciones: | (INCIPIT) Artículos |
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2009_González-García et al. - 2009 - Shape and kinematics of elliptical galaxies evolution due to merging at z 1.5.pdf | 732,32 kB | Adobe PDF | Visualizar/Abrir |
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