TY - JOUR
T1 - Predicting the properties of the remnants of dissipative galaxy mergers
AU - Covington, M.
AU - Dekel, A.
AU - Cox, T. J.
AU - Jonsson, P.
AU - Primack, J. R.
PY - 2008/2
Y1 - 2008/2
N2 - We construct a physically motivated model for predicting the properties of the remnants of gaseous galaxy mergers, given the properties of the progenitors and the orbit. The model is calibrated using a large suite of smoothed particle hydrodynamics (SPH) merger simulations. It implements generalized energy conservation while accounting for dissipative energy losses and star formation. The dissipative effects are evaluated from the initial gas fractions and from the orbital parameters via an 'impulse' parameter, which characterizes the strength of the encounter. Given the progenitor properties, the model predicts the remnant stellar mass, half-mass radius and velocity dispersion to an accuracy of 25 per cent. The model is valid for both major and minor mergers. We provide an explicit recipe for semi-analytic models of galaxy formation.
AB - We construct a physically motivated model for predicting the properties of the remnants of gaseous galaxy mergers, given the properties of the progenitors and the orbit. The model is calibrated using a large suite of smoothed particle hydrodynamics (SPH) merger simulations. It implements generalized energy conservation while accounting for dissipative energy losses and star formation. The dissipative effects are evaluated from the initial gas fractions and from the orbital parameters via an 'impulse' parameter, which characterizes the strength of the encounter. Given the progenitor properties, the model predicts the remnant stellar mass, half-mass radius and velocity dispersion to an accuracy of 25 per cent. The model is valid for both major and minor mergers. We provide an explicit recipe for semi-analytic models of galaxy formation.
KW - Galaxies: elliptical and lenticular, cD
KW - Galaxies: evolution
KW - Galaxies: formation
KW - Galaxies: interactions
UR - http://www.scopus.com/inward/record.url?scp=38749148053&partnerID=8YFLogxK
U2 - 10.1111/j.1365-2966.2007.12601.x
DO - 10.1111/j.1365-2966.2007.12601.x
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AN - SCOPUS:38749148053
SN - 0035-8711
VL - 384
SP - 94
EP - 106
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 1
ER -