Cosmological simulations and galaxy formation: prospects for HST/WFC3

Details Cosmological simulations and galaxy formation: prospects for HST/WFC3 Cosmological simulations and galaxy formation: prospects for HST/WFC3

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010sf2a.conf...43p&link_type=abstract

SF2A-2010: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics. Eds.: S. Boissier, M. Heydari-

Astronomy and Astrophysics

Astrophysics

Formation, Galaxies: Interactions, Galaxies: Structure, Galaxies: Kinematics And Dynamics, Galaxies: Photometry, Methods: N-Body Simulations

Scientific paper

The star formation history of nearby early-type galaxies is investigated via numerical modelling. Idealized hydrodynamical N-body simulations with a star formation prescription are used to study the minor merger process between a giant galaxy (host) and a less massive spiral galaxy (satellite). We find that the evolution of the star formation rate is extended over several dynamical times and shows peaks which correspond to pericentre passages of the satellite. The newly formed stars are mainly located in the central part of the satellite remnant while the older stars of the initial disc are deposited at larger radii in shell-like structures. Synthetic 2D images in J, H, NUV, Hβ and V bands, using the characteristic filters of the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope, reveal that residual star formation induced by gas-rich minor mergers can be clearly observed during and after the final plunge, especially in the near-ultraviolet band, for interacting systems at (z≤0.023) over moderate numbers of orbits (for more details see Peirani et al. 2010).

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