525 citations · 3.6k across the 35 of their papers we have counts for
15 papers · 1 filter
The influence of multiple stars on the high-mass stellar initial mass function and age-dating of young massive star clusters
C. Weidner, P. Kroupa, T. Maschberger
The study of young stellar populations has revealed that most stars are in binary or higher order multiple systems. In this study the influence on the stellar initial mass function…
A Search for EHB Pulsators in the Globular Cluster NGC 6752
M. Catelan, G. E. Prieto, M. Zoccali +8
We describe the status of a project whose main goal is to detect variability along the extreme horizontal branch of the globular cluster NGC 6752. Based on Magellan 6.5m data, prel…
Converting Halpha luminosities into SFRs
Jan Pflamm-Altenburg, Carsten Weidner, Pavel Kroupa
Star-formation rates (SFRs) of galaxies are commonly calculated by converting the measured Halpha luminosities (L_Halpha) into current SFRs. This conversion is based on a constant…
Converting H Luminosities into Star Formation Rates
Jan Pflamm-Altenburg, Carsten Weidner, Pavel Kroupa
The recent finding that the IGIMF (integrated galaxial initial stellar mass function) composed of all newly formed stars in all young star clusters has, in dependence of the SFR, a…
On the infant weight loss of low- to intermediate-mass star clusters
C. Weidner, P. Kroupa, D. E. A. Nuernberger +1
Star clusters are born in a highly compact configuration, typically with radii of less than about 1 pc roughly independently of mass. Since the star-formation efficiency is less th…
A Possible Origin of the Mass-Metallicity Relation of Galaxies
J. Koeppen, C. Weidner, P. Kroupa
Observations show that galaxies follow a mass-metallicity relation over a wide range of masses. One currently favoured explanation is that less massive galaxies are less able to re…
The maximum stellar mass, star-cluster formation and composite stellar populations
Carsten Weidner, Pavel Kroupa
We demonstrate that the mass of the most massive star in a cluster correlates non-trivially with the cluster mass. A simple algorithm according to which a cluster is filled up with…
Evidence for a fundamental stellar upper mass limit from clustered star formation, and some implications therof
Pavel Kroupa, Carsten Weidner
Theoretical considerations lead to the expectation that stars should not have masses larger than about m_{max*}=60-120Msun, while the observational evidence has been ambiguous. Onl…
The Variation of Integrated Star IMFs among Galaxies
C. Weidner, P. Kroupa
The integrated galaxial initial mass function (IGIMF) is the relevant distribution function containing the information on the distribution of stellar remnants, the number of supern…
IMF variations and their implications for Supernovae numbers
C. Weidner, P. Kroupa
The stellar initial mass function (IMF) integrated over an entire galaxy is an integral over all separate star-formation events. Since most stars form in star clusters with differe…
Variation of the IMF
Pavel Kroupa, Carsten Weidner
(abridged) The {stellar IMF} has been found to be essentially invariant. While some apparent differences are seen, the uncertainties inherent to this game do not allow a firm concl…
Monte-Carlo experiments on star-cluster induced integrated-galaxy IMF variations
Carsten Weidner, Pavel Kroupa
As most if not all stars are born in stellar clusters the shape of the mass function of the field stars is not only determined by the initial mass function of stars (IMF) but also…
Implications for the formation of star clusters from extra-galactic star-formation rates
C. Weidner, P. Kroupa, S. S. Larsen
Observations indicate that young massive star clusters in spiral and dwarf galaxies follow a relation between luminosity of the brightest young cluster and the star-formation rate…
Evidence for a fundamental stellar upper mass limit from clustered star formation
Carsten Weidner, Pavel Kroupa
The observed masses of the most massive stars do not surpass about 150Msun. This may either be a fundamental upper mass limit which is defined by the physics of massive stars and/o…
Galactic-Field IMFs of Massive Stars
Pavel Kroupa, Carsten Weidner
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 alph…