Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Maffione, Nicolás P."'
Modern astronomical potentials modeling galaxies or stellar systems can be rather involved, and deriving their first derivatives (accelerations) and second derivatives (variational equations) in order to compute orbits and their chaoticity may be a f
Externí odkaz:
http://arxiv.org/abs/2205.15980
Autor:
Gómez, Facundo A., Torres-Flores, Sergio, Mora-Urrejola, Catalina, Monachesi, Antonela, White, Simon D. M., Maffione, Nicolas P., Grand, Robert J. J., Marinacci, Federico, Pakmor, Rüdiger, Springel, Volker, Frenk, Carlos S., Amram, Philippe, Epinat, Benoît, de Oliveira, Claudia Mendes
We study the two dimensional (2D) line-of-sight velocity ($V_{\rm los}$) field of the low-inclination, late-type galaxy VV304a. The resulting 2D kinematic map reveals a global, coherent and extended perturbation that is likely associated with a recen
Externí odkaz:
http://arxiv.org/abs/2011.12323
Autor:
Simpson, Christine M., Gargiulo, Ignacio, Gómez, Facundo A., Grand, Robert J. J., Maffione, Nicolás, Cooper, Andrew P., Deason, Alis J., Frenk, Carlos, Helly, John, Marinacci, Federico, Pakmor, Rüdiger
We explore the predictive power of cosmological, hydrodynamical simulations for stellar phase space substructure and velocity correlations with the Auriga simulations and Aurigaia mock-Gaia catalogues. We show that at the solar circle the Auriga simu
Externí odkaz:
http://arxiv.org/abs/1905.09842
Autor:
Maffione, Nicolas P., Gómez, Facundo A., Cincotta, Pablo M., Giordano, Claudia M., Grand, Robert J. J., Marinacci, Federico, Pakmor, Rüdiger, Simpson, Christine M., Springel, Volker, Frenk, Carlos S.
In a previous paper based on dark matter only simulations we show that, in the approximation of an analytic and static potential describing the strongly triaxial and cuspy shape of Milky Way-sized haloes, diffusion due to chaotic mixing in the neighb
Externí odkaz:
http://arxiv.org/abs/1801.03946
Autor:
Maffione, Nicolás P., Gómez, Facundo A., Cincotta, Pablo M., Giordano, Claudia M., Cooper, Andrew P., O'Shea, Brian W.
We show that diffusion due to chaotic mixing in the Neighbourhood of the Sun may not be as relevant as previously suggested in erasing phase space signatures of past Galactic accretion events. For this purpose, we analyse Solar Neighbourhood-like vol
Externí odkaz:
http://arxiv.org/abs/1508.00579
Autor:
Sándor, Zsolt, Maffione, Nicolás
A recently introduced chaos detection method, the Relative Lyapunov Indicator (RLI) is investigated in the cases of symplectic mappings and continuous Hamiltonian systems. It is shown that the RLI is an efficient numerical tool in determining the tru
Externí odkaz:
http://arxiv.org/abs/1501.07264
Together with the variational indicators of chaos, the spectral analysis methods have also achieved great popularity in the field of chaos detection. The former are based on the concept of local exponential divergence. The latter are based on the num
Externí odkaz:
http://arxiv.org/abs/1212.3175
The reader can find in the literature a lot of different techniques to study the dynamics of a given system and also, many suitable numerical integrators to compute them. Notwithstanding the recent work of Maffione et al. (2011a) for mappings, a deta
Externí odkaz:
http://arxiv.org/abs/1205.0875
Publikováno v:
Int.J.Nonlinear Mech.46:23-34,2011
To investigate non-linear dynamical systems, like for instance artificial satellites, Solar System, exoplanets or galactic models, it is necessary to have at hand several tools, such as a reliable dynamical indicator. The aim of the present work is t
Externí odkaz:
http://arxiv.org/abs/1108.5481
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