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On the variation of the initial mass function
- P. Kroupa
- Physics
- 1 September 2000
A universal initial mass function (IMF) is not intuitive, but so far no convincing evidence for a variable IMF exists. The detection of systematic variations of the IMF with star-forming conditions…
The Initial Mass Function of Stars: Evidence for Uniformity in Variable Systems
- P. Kroupa
- Physics, GeologyScience
- 4 January 2002
TLDR
The distribution of low-mass stars in the Galactic disc
- P. Kroupa, C. Tout, G. Gilmore
- Physics
- 1 June 1993
We quantify the complex interdependence of stellar binarity, the stellar mass-luminosity relation, the mass function, the colour-magnitude relation and Galactic disc structure, all of which must be…
Galactic-Field Initial Mass Functions of Massive Stars
- P. Kroupa, C. Weidner
- Physics
- 1 December 2003
Over the past years observations of young and populous star clusters have shown that the stellar initial mass function (IMF) appears to be an invariant featureless Salpeter power law with an exponent…
Galactic-Field IMFs of Massive Stars
- P. Kroupa, C. Weidner
- Physics
- 20 August 2003
Over the past years observations of young and populous star clusters have shown that the stellar IMF appears to be an invariant featureless Salpeter power-law with an exponent alpha=2.35 for stars…
A comprehensive set of simulations studying the influence of gas expulsion on star cluster evolution
- H. Baumgardt, P. Kroupa
- Physics
- 13 July 2007
We have carried out a large set of N-body simulations studying the effect of residual-gas expulsion on the survival rate, and final properties of star clusters. We have varied the star formation…
Inverse dynamical population synthesis and star formation
- P. Kroupa
- Physics
- 25 August 1995
We investigate the hypothesis that stars form in aggregates of binary systems and that the dynamical evolution of these aggregates leads to the observed properties of binary stars in the Galactic…
The dynamical properties of stellar systems in the Galactic disc
- P. Kroupa
- Physics
- 18 August 1995
We postulate that most stars are born in aggregates of binary systems which are dynamically equivalent to the `dominant mode cluster'. The initial binary orbits are consitent with pre-main sequence…
The formation of a bound star cluster: from the orion nebula cluster to the pleiades
- P. Kroupa, S. Aarseth, J. Hurley
- Physics
- 28 September 2000
Summary Direct N-body calculations are presented of the formation of Galactic clusters using GasEx, which is a variant of the code Nbody6. The calculations focus on the possible evolution of the…
The Great disk of Milky Way satellites and cosmological sub-structures
We show that the shape of the observed distribution of Milky Way (MW) satellites is inconsistent with their being drawn from a cosmological sub-structure population with a confidence of 99.5 per…
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