Journal ArticleDOI
Modeling of the Initial Mass Function Using the Metropolis−Hastings Algorithm
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TLDR
In this article, a stochastic model for the hierarchical fragmentation of a molecular cloud was developed, where the number of fragments, time between successive fragmentation steps, and mass of a fragment were considered as random variables, and fragment masses were generated using the Metropolis-Hastings algorithm.Abstract:
A stochastic model has been developed for the hierarchical fragmentation of a molecular cloud. Here, the number of fragments, time between successive fragmentation steps, and mass of a fragment are considered as random variables, and fragment masses are generated using the Metropolis-Hastings algorithm. The resulting mass spectra, computed at different projected distances and taking opacity into consideration, show a signature of mass segregation. The critical mass, mass spectrum, and mass segregation are consistent with the observations of young massive clusters in our Galaxy as well as in external galaxies.read more
Citations
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The initial mass function modeled by a left truncated beta distribution
TL;DR: In this article, a left truncated beta probability density function was introduced to demonstrate the advantage of introducing a four-parameter initial mass function for the stars and the presence of brown dwarfs.
Journal ArticleDOI
Cosmic history of integrated galactic stellar initial mass function : a simulation study
TL;DR: In this paper, the authors investigated the effect of the evolution of the stellar initial mass function (IMF) with increasing redshift on the formation of massive clusters in star burst galaxies.
Journal ArticleDOI
Cosmic History of the Integrated Galactic Stellar Initial Mass Function: A Simulation Study
TL;DR: In this article, the authors investigate the evolution of the stellar initial mass function (IMF) and varying indices of β for the integrated galactic initial mass functions, in relation to several measures of star formation rates of galaxies at various redshifts by random simulation.
Journal ArticleDOI
The low-mass Initial Mass Function in the 30 Doradus starburst cluster
Morten Andersen,Hans Zinnecker,A. Moneti,Mark J. McCaughrean,Mark J. McCaughrean,Bernhard R. Brandl,Wolfgang Brandner,G. Meylan,Deidre A. Hunter +8 more
TL;DR: In this article, the authors presented deep Hubble Space Telescope (HST) NICMOS 2 F160W band observations of the central 56*57" (14pc*14.25pc) region around R136 in the starburst cluster 30 Dor (NGC 2070) located in the Large Magellanic Cloud.
Journal Article
The Formation and Early Dynamical Evolution of Bound Stellar Systems
TL;DR: In this paper, the results of numerical N-body calculations which simulate the dynamical evolution of young clusters as they emerge from molecular clouds have been presented, and the combination of these parameters which result in the production of bound stellar groups after the gas not used in star formation is completely dispersed.
References
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Journal ArticleDOI
Intermediate to low-mass stellar content of Westerlund 1
Wolfgang Brandner,J. Simon Clark,Andrea Stolte,Rens Waters,Ignacio Negueruela,Simon P. Goodwin +5 more
TL;DR: In this paper, the authors analyzed near-infrared NTT/SofI observations of the starburst cluster Westerlund 1, which is among the most massive young clusters in the Milky Way.
Journal ArticleDOI
On the Constancy of the Characteristic Mass of Young Stars
TL;DR: In this paper, it was shown that the mass of the stellar initial mass function depends weakly on density, temperature, metallicity, and radiation field in three environments: the dense cores where stars form, larger star-forming regions ranging from GMCs to galactic disks, and the interiors of H ii regions and super star clusters.
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The Arches Cluster Mass Function
TL;DR: In this article, the authors analyzed H- and Ks-band images of the Arches cluster obtained using the NIRC2 instrument on Keck with the laser guide star adaptive optics (LGS AO) system.
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The initial mass function and stellar content of ngc 3603
TL;DR: In this paper, the authors present optical color-magnitude diagrams (CMDs) for the stars in the cluster core down to V = 22 mag, which confirms the finding by Eisenhauer et al. that low-mass stars are forming in the starburst cluster.
Journal ArticleDOI
On the Similarity between Cluster and Galactic Stellar Initial Mass Functions
TL;DR: This paper showed that the mass distribution function for star clusters and associations is a power law with a slope of -2 or shallower than the cluster initial mass function, which is expected from the hierarchical nature of star formation, which also provides independent evidence for the IMF equality when applied on subcluster scales.