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Your search keyword '"Peirani, S."' showing total 18 results
Start Over Author "Peirani, S." Publisher edp sciences
18 results on '"Peirani, S."'

4. The role of AGN feedback in the structure, kinematics, and evolution of ETGs in Horizon simulations

Author

Sub String Theory Cosmology and ElemPart, Theoretical Physics, Rosito, M. S., Pedrosa, S. E., Tissera, P. B., Chisari, N. E., Dominguez-Tenreiro, R., Dubois, Y., Peirani, S., Devriendt, J., Pichon, C., Slyz, A., Sub String Theory Cosmology and ElemPart, Theoretical Physics, Rosito, M. S., Pedrosa, S. E., Tissera, P. B., Chisari, N. E., Dominguez-Tenreiro, R., Dubois, Y., Peirani, S., Devriendt, J., Pichon, C., and Slyz, A.

Published
2021

5. Formation of compact galaxies in the Extreme-Horizon simulation

Author

Chabanier, S., primary, Bournaud, F., additional, Dubois, Y., additional, Codis, S., additional, Chapon, D., additional, Elbaz, D., additional, Pichon, C., additional, Bressand, O., additional, Devriendt, J., additional, Gavazzi, R., additional, Kraljic, K., additional, Kimm, T., additional, Laigle, C., additional, Lekien, J.-B., additional, Martin, G., additional, Palanque-Delabrouille, N., additional, Peirani, S., additional, Piserchia, P.-F., additional, Slyz, A., additional, Trebitsch, M., additional, and Yèche, C., additional

Published
2020
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6. Ubiquitous cold and massive filaments in cool core clusters

Author

Olivares, V., primary, Salome, P., additional, Combes, F., additional, Hamer, S., additional, Guillard, P., additional, Lehnert, M. D., additional, Polles, F. L., additional, Beckmann, R. S., additional, Dubois, Y., additional, Donahue, M., additional, Edge, A., additional, Fabian, A. C., additional, McNamara, B., additional, Rose, T., additional, Russell, H. R., additional, Tremblay, G., additional, Vantyghem, A., additional, Canning, R. E. A., additional, Ferland, G., additional, Godard, B., additional, Peirani, S., additional, and Pineau des Forets, G., additional

Published
2019
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10. Phase-space structure analysis of self-gravitating collisionless spherical systems.

Author

Halle, A., Colombi, S., and Peirani, S.

Subjects
GRAVITY, DENSITY, NUMERICAL analysis, MORPHOLOGY, VELOCITY
Abstract

In the mean field limit, isolated gravitational systems often evolve towards a steady state through a violent relaxation phase. One question is to understand the nature of this relaxation phase, in particular the role of radial instabilities in the establishment/destruction of the steady profile. Here, through a detailed phase-space analysis based both on a spherical Vlasov solver, a shell code, and a N-body code, we revisit the evolution of collisionless self-gravitating spherical systems with initial power-law density profiles ρ(r) ∝ rn, 0 ≤ n ≤ −1.5, and Gaussian velocity dispersion. Two sub-classes of models are considered, with initial virial ratios η = 0.5 ("warm") and η = 0.1 ("cool"). Thanks to the numerical techniques used and the high resolution of the simulations, our numerical analyses are able, for the first time, to show the clear separation between two or three well-known dynamical phases: (i) the establishment of a spherical quasi-steady state through a violent relaxation phase during which the phase-space density displays a smooth spiral structure presenting a morphology consistent with predictions from self-similar dynamics, (ii) a quasi-steady-state phase during which radial instabilities can take place at small scales and destroy the spiral structure but do not change quantitatively the properties of the phase-space distribution at the coarse grained level, and (iii) relaxation to a non-spherical state due to radial orbit instabilities for n ≤ −1 in the cool case. [ABSTRACT FROM AUTHOR]

Published
2019
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11. Simulations of BAO reconstruction with a quasar Ly-αsurvey

Author

Le Goff, J. M., primary, Magneville, C., additional, Rollinde, E., additional, Peirani, S., additional, Petitjean, P., additional, Pichon, C., additional, Rich, J., additional, Yeche, C., additional, Aubourg, E., additional, Busca, N., additional, Charlassier, R., additional, Delubac, T., additional, Hamilton, J. C., additional, Palanque Delabrouille, N., additional, Pâris, I., additional, and Vargas Magaña, M., additional

Published
2011
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12. A principal component analysis of quasar UV spectra atz ~ 3

Author

Pâris, I., primary, Petitjean, P., additional, Rollinde, E., additional, Aubourg, E., additional, Busca, N., additional, Charlassier, R., additional, Delubac, T., additional, Hamilton, J.-Ch., additional, Le Goff, J.-M., additional, Palanque-Delabrouille, N., additional, Peirani, S., additional, Pichon, Ch., additional, Rich, J., additional, Vargas-Magaña, M., additional, and Yèche, Ch., additional

Published
2011
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