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We use N-body integration to follow the evolution of clusters of 200 binary systems with different initial half mass radii $R_{0.5}$. We also simulate single-star clusters. All clusters evolve according to the same $n(t)$ curve, where…

Astrophysics · Physics 2015-06-24 Pavel Kroupa

We study the impact of stellar winds and supernovae on the multi-phase interstellar medium using three-dimensional hydrodynamical simulations carried out with FLASH. The selected galactic disc region has a size of (500 pc)$^2$ x $\pm$ 5 kpc…

Astrophysics of Galaxies · Physics 2017-01-25 A. Gatto , S. Walch , T. Naab , P. Girichidis , R. Wünsch , S. C. O. Glover , R. S. Klessen , P. C. Clark , T. Peters , D. Derigs , C. Baczynski , J. Puls

Context: Star clusters form within giant molecular clouds that are strongly altered by the feedback action of the massive stars, but the cluster still remains embedded in a dense, highly turbulent medium and interactions with ambient…

Astrophysics of Galaxies · Physics 2022-11-16 Paolo Suin , Steven N. Shore , Václav Pavlík

We analyze the physical properties of stellar clusters that are detected in massive star-forming regions in the MYStIX project--a comparative, multiwavelength study of young stellar clusters within 3.6 kpc that contain at least one O-type…

We studied the effects of cluster environments on galactic structures by using the TNG50 cosmological simulation and observed galaxies in the Fornax cluster. We focused on galaxies with stellar masses of $10^{8-12}M_{\odot}$ at z=0 that…

To study how the environment can influence the relation between stellar mass and effective radius of nearby galaxies (z < 0.12), we use a mass-complete sample extracted from the NYU-Value Added Catalogue. This sample contains almost 232000…

Astrophysics of Galaxies · Physics 2015-06-19 María Cebrián , Ignacio Trujillo

The observed properties of young star clusters, such as the core radius and luminosity profile, change rapidly during the early evolution of the clusters. Here we present observations of 6 young clusters in M51 where we derive their sizes…

Astrophysics · Physics 2009-11-13 N. Bastian , M. Gieles , S. P. Goodwin , G. Trancho , L. J. Smith , I. Konstantopoulos , Yu. Efremov

The residual gas within newly formed star clusters is expelled through stellar feedback on timescales ~ 1 Myr. The subsequent expansion of the cluster results in an unbinding of a fraction of stars before the remaining cluster members can…

Astrophysics of Galaxies · Physics 2017-03-29 N. Brinkmann , S. Banerjee , B. Motwani , P. Kroupa

The physical properties of star cluster populations offer valuable insights into their birth, evolution, and disruption. However, individual stars in clusters beyond the nearest neighbours of the Milky Way are unresolved, forcing analyses…

Astrophysics of Galaxies · Physics 2024-07-24 Jianling Tang , Kathryn Grasha , Mark R. Krumholz

Most stars are born in dense stellar environments where the formation and early evolution of planetary systems may be significantly perturbed by encounters with neighbouring stars. To investigate on the fate of circumstellar gas disks and…

Earth and Planetary Astrophysics · Physics 2023-09-14 Francesco Flammini Dotti , Roberto Capuzzo-Dolcetta , M. B. N. Kouwenhoven

The evolution of circumstellar discs is influenced by their surroundings. The relevant processes include external photoevaporation due to nearby stars, and dynamical truncations. The impact of these processes on disc populations depends on…

Astrophysics of Galaxies · Physics 2025-10-03 Francisca Concha-Ramírez , Maite J. C. Wilhelm , Simon Portegies Zwart

Infant mortality brought about by the expulsion of a star cluster's natal gas is widely invoked to explain cluster statistics at different ages. While a well studied problem, most recent studies of gas expulsion's effect on a cluster have…

Solar and Stellar Astrophysics · Physics 2015-06-05 Nickolas Moeckel , Christopher Holland , Cathie J. Clarke , Ian A. Bonnell

The stellar-dynamical evolution of bound star clusters during the first few Myr is dominated by binary-binary and binary-star interactions, the rapid sinking of the most massive stars to the centre of the clusters and mass loss from…

Astrophysics · Physics 2007-05-23 Pavel Kroupa

It appears that most stars are born in clusters, and that at birth most stars have circumstellar discs which are comparable in size to the separations between the stars. Interactions between neighbouring stars and discs are therefore likely…

Astrophysics · Physics 2015-06-24 H. M. J. Boffin , S. J. Watkins , A. S. Bhattal , N. Francis , A. P. Whitworth

Most stars form in highly clustered environments within molecular clouds, but eventually disperse into the distributed stellar field population. Exactly how the stellar distribution evolves from the embedded stage into gas-free associations…

Astrophysics of Galaxies · Physics 2023-09-21 Juan P. Farias , Stella S. R. Offner , Michael Y. Grudić , Dávid Guszejnov , Anna L. Rosen

Most stars form in a cluster environment. These stars are initially surrounded by discs from which potentially planetary systems form. Of all cluster environments starburst clusters are probably the most hostile for planetary systems in our…

Astrophysics of Galaxies · Physics 2015-06-05 C. Olczak , T. Kaczmarek , S. Harfst , S. Pfalzner , S. Portegies Zwart

The frequency of discs around young stars, a key parameter for understanding planet formation, is most readily determined in young stellar clusters where many relatively coeval stars are located in close proximity. Observational studies…

Astrophysics of Galaxies · Physics 2015-06-22 Susanne Pfalzner , Manuel Steinhausen , Karl Menten

Context. Open clusters (OCs) are important for understanding star formation, dynamics, and evolution. Previous studies have indicated a relationship between cluster structure and member star properties, but the formation mechanism of the…

Astrophysics of Galaxies · Physics 2025-05-16 Kaixiang Lang , Yu Zhang , Hubiao Niu , Jayanand Maurya , Jinzhong Liu , Guimei Liu

Massive star clusters are often used as tracers of galaxy formation and assembly. In order to do so, we must understand their properties at formation, and how those properties change with time, galactic environment, and galaxy assembly…

Astrophysics of Galaxies · Physics 2023-07-05 Marta Reina-Campos , Alison Sills , Godefroy Bichon

(abridged) A scenario for the formation of multiple co-eval populations separated in age by about 1 Myr in very young clusters (VYCs, ages less than 10 Myr) and with masses in the range 600-20000 Msun is outlined. It rests upon a converging…

Astrophysics of Galaxies · Physics 2018-05-02 Pavel Kroupa , Tereza Jerabkova , František Dinnbier , Giacomo Beccari , Zhiqiang Yan