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Similarity in shape between the initial mass function (IMF) and the core mass functions (CMFs) in star-forming regions prompts the idea that the IMF originates from the CMF through a self-similar core-to-star mass mapping process. To…

Astrophysics of Galaxies · Physics 2021-09-08 Yue Cao , Keping Qiu , Qizhou Zhang , Yuwei Wang , Yuanming Xiao

Observational studies are showing that the galaxy-wide stellar initial mass function are top-heavy in galaxies with high star-formation rates (SFRs). Calculating the integrated galactic stellar initial mass function (IGIMF) as a function of…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-17 Carsten Weidner , Pavel Kroupa , Jan Pflamm-Altenburg , Alexandre Vazdekis

Observations of young star clusters reveal that the high-mass end of the cluster initial mass function (CIMF) deviates from a pure power-law and instead truncates exponentially. We investigate the effects of this truncation on the formation…

Astrophysics of Galaxies · Physics 2019-03-27 Nick Choksi , Oleg Y. Gnedin

We study the core mass function (CMF) of the massive protocluster G286.21+0.17 with the Atacama Large Millimeter/submillimeter Array via 1.3~mm continuum emission at a resolution of 1.0\arcsec\ (2500~au). We have mapped a field of…

Astrophysics of Galaxies · Physics 2018-02-14 Yu Cheng , Jonathan C. Tan , Mengyao Liu , Shuo Kong , Wanggi Lim , Morten Andersen , Nicola Da Rio

We have studied the evolution of globular cluster systems (GCS) in elliptical galaxies with a power-law initial GCS mass function (GCMF) ($f(M) \propto M^{-\alpha}$) similar to that predicted by some theoretical studies of globular clusters…

Astrophysics · Physics 2008-11-26 E. Vesperini

[abridged] Stars are thought to be formed predominantly in clusters. The clusters are formed following a cluster initial mass function (CMF) similar to the stellar initial mass function (IMF). Both the IMF and the CMF favour low-mass…

Astrophysics of Galaxies · Physics 2012-05-31 M. R. Haas , P. Anders

The goal of this paper is to test whether the formation rate of star clusters is proportional to the star formation rate (SFR) in galaxies. As a first step, we present the mass functions of compact clusters younger than 10 Myr in seven…

Astrophysics of Galaxies · Physics 2015-09-09 Rupali Chandar , S. Michael Fall , Bradley C. Whitmore

We analyze the three-dimensional shapes and kinematics of the young star cluster population forming in a high-resolution GRIFFIN project simulation of a metal-poor dwarf galaxy starburst. The star clusters, which follow a power-law mass…

Astrophysics of Galaxies · Physics 2020-12-02 Natalia Lahén , Thorsten Naab , Peter H. Johansson , Bruce Elmegreen , Chia-Yu Hu , Stefanie Walch

Studies of extra-galactic globular clusters have shown that the peak size of the globular cluster (GC) radius distribution (RD) depends only weakly on galactic environment, and can be used as a standard ruler. We model RDs of GC populations…

Astrophysics of Galaxies · Physics 2015-06-15 Poul E. R. Alexander , Mark Gieles

Evolution of the mass function (MF) and radial distribution (RD) of the Galactic globular cluster (GC) system is calculated using an advanced and a realistic Fokker-Planck (FP) model that considers dynamical friction, disc/bulge shocks and…

Astrophysics · Physics 2009-11-13 Jihye Shin , Sungsoo S. Kim , Koji Takahashi

We present a study of the M83 cluster population, covering the disc of the galaxy between radii of 0.45 and 4.5 kpc. We aim to probe the properties of the cluster population as a function of distance from the galactic centre. We observe a…

Astrophysics of Galaxies · Physics 2015-07-15 Angela Adamo , Diederik Kruijssen , Nate Bastian , Esteban Silva-Villa , Jenna Ryon

We study the dynamical evolution of the M87 globular cluster system (GCS) with a number of numerical simulations. We explore a range of different initial conditions for the GCS mass function (GCMF), for the GCS spatial distribution and for…

Astrophysics · Physics 2009-11-07 E. Vesperini , S. E. Zepf , A. Kundu , K. M. Ashman

We have determined stellar mass functions of 120 Milky Way globular clusters and massive LMC/SMC star clusters based on a comparison of archival Hubble Space Telescope photometry with a large grid of direct N-body simulations. We find a…

Astrophysics of Galaxies · Physics 2023-05-03 Holger Baumgardt , Vincent Henault-Brunet , Nolan Dickson , Antonio Sollima

We investigate the relation of the stellar initial mass function (IMF) and the dense core mass function (CMF), using stellar masses and positions in 14 well-studied young groups. Initial column density maps are computed by replacing each…

Solar and Stellar Astrophysics · Physics 2011-06-24 Manon Michel , Helen Kirk , Philip C. Myers

The combination of the high-resolution ALMA, JWST and HST observations provides unprecedented insights into the connection between individual molecular clouds and their internal stellar populations in nearby galaxies. The molecular clouds…

Astrophysics of Galaxies · Physics 2025-07-01 J. W. Zhou , Pavel Kroupa , Sami Dib

Many studies have revealed that the core mass function (CMF) in high-mass star-forming regions is top-heavy. In this work, we start from the canonical initial mass function (IMF) to inversely synthesize the observed CMFs of high-mass star…

Astrophysics of Galaxies · Physics 2025-03-18 J. W. Zhou , Pavel Kroupa , Sami Dib

We have undertaken the largest systematic study of the high-mass stellar initial mass function (IMF) to date using the optical color-magnitude diagrams (CMDs) of 85 resolved, young (4 Myr < t < 25 Myr), intermediate mass star clusters…

We present a simple physical model for the minimum mass of bound stellar clusters as a function of the galactic environment. The model evaluates which parts of a hierarchically-clustered star-forming region remain bound given the…

Astrophysics of Galaxies · Physics 2019-07-17 Sebastian Trujillo-Gomez , Marta Reina-Campos , J. M. Diederik Kruijssen

Context. Stars form in dense, dusty clumps of molecular clouds, but little is known about their origin, their evolution and their detailed physical properties. In particular, the relationship between the mass distribution of these clumps…

Astrophysics of Galaxies · Physics 2014-05-08 L. Olmi , D. Angles-Alcazar , D. Elia , S. Molinari , M. Pestalozzi , S. Pezzuto , E. Schisano , L. Testi , M. Thompson

Clusters that form in total 10^3 < N < 10^5 stars (type II clusters) lose their gas within a dynamical time as a result of the photo-ionising flux from O stars. Sparser (type I) clusters get rid of their residual gas on a timescale longer…

Astrophysics · Physics 2009-11-07 Pavel Kroupa , Christian Boily