The Role of Gravitational Shock Heating in Isolated Galaxies from Cosmological Simulations

Details The Role of Gravitational Shock Heating in Isolated Galaxies from Cosmological Simulations The Role of Gravitational Shock Heating in Isolated Galaxies from Cosmological Simulations

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aspc..421..275o&link_type=abstract

Galaxies in Isolation: Exploring Nature Versus Nurture, proceedings of a conference held 12 to 15 May 2009 in Granada, Spain. Ed

Astronomy and Astrophysics

Astronomy

Scientific paper

Using a sample of elliptical-like objects (ELOs) obtained from self-consistent hydrodynamical simulations, we have studied the role of gravitational shock heating in the stellar, gas and dark matter structural and kinematical properties from galaxy scale up to the halo scale. We have found a systematic decrease of baryonic fraction with increasing ELO mass at all these scales. We have followed the ELO sample up to higher redshifts to study the origin of this effect, which may play an important role in explaining the tilt of the Fundamental Plane at the galaxy scale and the lack of baryons observed at halo scales.

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