SIMBAD references

2019ApJ...872...93M - Astrophys. J., 872, 93-93 (2019/February-2)

Constraints on upper cutoffs in the mass functions of young star clusters.


Abstract (from CDS):

We test claims that the power-law mass functions of young star clusters (ages <= few x 108 yr) have physical upper cutoffs at M*∼105M. Specifically, we perform maximum likelihood fits of the Schechter function, ψ(M)=dN/dM∝Mβexp(-M/M*), to the observed cluster masses in eight well-studied galaxies (LMC, SMC, NGC 4214, NGC 4449, M83, M51, Antennae, and NGC 3256). In most cases, we find that a wide range of cutoff masses is permitted (105M≲M*< ∞). We find a weak detection at M*∼105M in one case (M51) and strong evidence against this value in two cases. However, when we include realistic errors in cluster masses in our analysis, the constraints on M* become weaker and there are no significant detections (even for M51). Our data are generally consistent with much larger cutoffs, at M*∼few×106M. This is the predicted cutoff from dynamical models in which old globular clusters and young clusters observed today formed by similar physical processes with similar initial mass functions.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: star clusters: general - stars: formation

Status in Simbad:  waiting for electronic table

Simbad objects: 8

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