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
The lower mass function of the young open cluster Blanco 1: from 30 M_(Jup) to 3 M_☉
TL;DR: In this paper, the authors performed a deep wide field optical survey of the young (~100−150 Myr) open cluster Blanco 1 to study its low mass population well down into the brown dwarf regime and estimate its mass function over the whole cluster mass range.
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Collisional formation of very massive stars in dense clusters
TL;DR: In this article, the authors investigate the contraction of accreting protoclusters using an extension of n-body techniques that incorporates the accretional growth of stars from the gaseous reservoir in which they are embedded.
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The minimum mass for opacity-limited fragmentation in turbulent cloud cores
TL;DR: In this article, the authors presented a new analysis of the minimum mass for star formation, based on opacity-limited fragmentation, which is more stringent than the standard one in that fragments to have condensation timescales shorter than all competing mass scales.
Journal ArticleDOI
Maximum stellar mass versus cluster membership number revisited
Th. Maschberger,Cathie J. Clarke +1 more
TL;DR: In this article, a new compilation of observations of maximum stellar mass versus cluster membership number from the literature is made, which analyzes for consistency with the predictions of a simple random drawing hypothesis for stellar mass selection in clusters.
Journal ArticleDOI
A YOUNG PLANETARY-MASS OBJECT IN THE ρ OPH CLOUD CORE
TL;DR: In this article, the authors reported the discovery of a young planetary-mass brown dwarf in the ρ Oph cloud core using a 1.5-2.4 μm low-resolution spectrum obtained using the NIRC instrument on the Keck I telescope.