Continuous stellar mass-loss in N-body models of galaxies

Details Continuous stellar mass-loss in N-body models of galaxies Continuous stellar mass-loss in N-body models of galaxies

2001-07-09

arxiv.org/abs/astro-ph/0107160v1

Astronomy and Astrophysics

Astrophysics

accepted for publication in Astronomy & Astrophysics (13 pages, 11 postscript figures)

Scientific paper

10.1051/0004-6361:20010966

We present an N-body computer code - aimed at studies of galactic dynamics - with a CPU-efficient algorithm for a continuous (i.e. time-dependent) stellar mass-loss. First, we summarize available data on stellar mass-loss and derive the long-term (20 Gyr) dependence of mass-loss rate of a coeval stellar population. We then implement it, through a simple parametric form, into a particle-mesh code with stellar and gaseous particles. We perform several tests of the algorithm reliability and show an illustrative application: a 2D simulation of a disk galaxy, starting as purely stellar but evolving as two-component due to gradual mass-loss from initial stars and due to star formation. In a subsequent paper we will use the code to study what changes are induced in galactic disks by the continuous gas recycling compared to the instantaneous recycling approximation, especially the changes in star formation rate and radial inflow of matter.

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