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By adopting the empirical constraints related to the estimates of Helium enhancement ($\Delta Y$), present mass ratio between first and second stellar generations ($M_{1G}/M_{2G}$) and the actual mass of Galactic globular clusters…

Astrophysics of Galaxies · Physics 2016-07-20 Guillermo Tenorio-Tagle , Casiana Munoz-Tunon , Santi Cassisi , Sergiy Silich

Massive star clusters observed in galaxy mergers are often suggested to be progenitors of globular clusters. To study this hypothesis, we performed the highest resolution simulation of a gas-rich galaxy merger so far. The formation of…

Astrophysics · Physics 2009-11-13 F. Bournaud , P. -A. Duc , E. Emsellem

The existence of older stars within a young star cluster can be interpreted to imply that star formation occurs on time scales longer than a free-fall time of a pre-cluster cloud core. Here the idea is explored that these older stars are…

Astrophysics · Physics 2008-11-26 Jan Pflamm-Altenburg , Pavel Kroupa

The Antennae is a pair of late type spirals in the course of merging. The interaction triggered an ongoing strong burst of star formation that also produced a large number of Young Star Clusters (YSCs), many of which seem to be young…

Astrophysics · Physics 2007-05-23 U. Fritze-v. Alvensleben

When the cosmic star formation history peaks (z ~ 2), galaxies vigorously fed by cosmic reservoirs are gas dominated and contain massive star-forming clumps, thought to form by violent gravitational instabilities in highly turbulent…

Astrophysics of Galaxies · Physics 2015-05-07 A. Zanella , E. Daddi , E. Le Floc'h , F. Bournaud , R. Gobat , F. Valentino , V. Strazzullo , A. Cibinel , M. Onodera , V. Perret , F. Renaud , C. Vignali

Typical globular clusters (GCs - young and old) host stellar populations with little or no star-to-star variations in heavy elements (e.g., Ca, Fe) nor in age. Nuclear star clusters (NSCs), on the other hand, host complex stellar…

Astrophysics of Galaxies · Physics 2021-11-03 Nate Bastian , Joel Pfeffer

The similarity between the mass and spatial distributions of pre-stellar gas cores in star-forming clouds and young stars in clusters provides strong circumstantial evidence that these gas cores are the direct progenitors of individual…

Astrophysics · Physics 2007-06-27 Mark R. Krumholz

Two generations of stars, G1 and G2, typically populate Galactic globular clusters (GCs). The origin of G2 stars is unclear. We uncover two empirical dependencies between GC characteristics, which can be explained by the formation of G2…

Astrophysics of Galaxies · Physics 2022-09-23 Valery Kravtsov , Sami Dib , Francisco A. Calderon , Jose A. Belinchon

Dynamical evolution plays a key role in shaping the current properties of star clusters and star cluster systems. A detailed understanding of the effects of evolutionary processes is essential to be able to disentangle the properties which…

Astrophysics of Galaxies · Physics 2015-05-14 Enrico Vesperini

We perform cosmological hydrodynamical simulations to study the formation of proto-globular cluster candidates in progenitors of present-day dwarf galaxies $(M_{\rm vir} \approx 10^{10}\, {\rm M}_\odot$ at $z=0$) as part of the "Feedback in…

Observations of Young Star Cluster ({\bf YSC}) systems in interacting galaxies are reviewed with particular emphasis on their Luminosity Functions ({\bf LF}) and colour distributions. A few spectroscopic abundance measurements are…

Astrophysics · Physics 2007-05-23 Uta Fritze-v. Alvensleben

We discuss the structural change and degree of mass segregation of young dense star clusters within about 100pc of the Galactic center. In our calculations, which are performed with GRAPE-6, the equations of motion of all stars and binaries…

Astrophysics · Physics 2007-05-23 Simon Portegies Zwart , Stephen McMillan , Holger Baumgardt

The properties of young massive clusters (YMCs) are key to understanding the star formation mechanism in starburst systems, especially mergers. We present ALMA high-resolution ($\sim$10 pc) continuum (100 and 345 GHz) data of YMCs in the…

Astrophysics of Galaxies · Physics 2022-04-06 Hao He , Christine Wilson , Nathan Brunetti , Molly Finn , Ashley Bemis , Kelsey Johnson

There is increasing evidence that some massive globular clusters (GCs) host multiple stellar populations having different heavy element abundances enriched by supernovae. They usually accompany multiple red giant branches (RGBs) in the…

Astrophysics of Galaxies · Physics 2015-06-12 Seok-Joo Joo , Young-Wook Lee

Recent observations have found that the age distribution of star clusters (SCs) in the Small Magellanic Cloud (SMC) shows a sharp peak around 2 Gyr ago. However, it is theoretically unclear what physical processes are responsible for such…

Astrophysics of Galaxies · Physics 2021-12-30 Mia L Williams , Kenji Bekki , Madeleine L McKenzie

The existence of complex stellar populations in some star clusters challenges the understanding of star formation. E.g. the ONC or the sigma Orionis cluster host much older stars than the main bulk of the young stars. Massive star clusters…

Astrophysics · Physics 2009-11-13 Jan Pflamm-Altenburg , Pavel Kroupa

Studying outflows from young massive star-forming clusters allows one to deduce physical processes that lead to the formation of the most massive stars. I will review the current state of high-spatial-resolution interferometric (sub-)mm…

Astrophysics · Physics 2007-05-23 H. Beuther

We investigate the young stellar cluster population of M51 and how it is affected by encounters with giant molecular clouds (GMCs). We combine a galactic model with $N$-body simulations of 5000 unique clusters in the mass range [600 -…

Astrophysics of Galaxies · Physics 2025-09-23 Timmi G. Jørgensen , Ross P. Church

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

We present a study correlating the spatial locations of young star clusters with those of molecular clouds in NGC~5194, in order to investigate the timescale over which clusters separate from their birth clouds. The star cluster catalogues…