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During their evolution, star clusters undergo mass segregation, by which the orbits of the most massive stars shrink, while the lighter stars move outwards from the cluster centre. In this context, recent observations and dynamical…

Astrophysics of Galaxies · Physics 2015-11-04 Manuel Arca-Sedda

We investigate the triggering of star formation and the formation of stellar clusters in molecular clouds that form as the ISM passes through spiral shocks. The spiral shock compresses gas into $\sim$100 pc long main star formation ridge,…

Astrophysics of Galaxies · Physics 2017-10-13 R. Smilgys , I. A. Bonnell

The aims are to investigate the clustering of the far-infrared sources from the Herschel infrared Galactic Plane Survey (Hi-GAL) in the Galactic longitude range of -71 to 67 deg. These clumps, and their spatial distribution, are an imprint…

Young massive star clusters spanning $\sim 10^4 - 10^8 M_\odot$ in mass have been observed to have similar surface brightness profiles. Recent hydrodynamical simulations of star cluster formation have also produced star clusters with this…

A significant fraction of high redshift star-forming disc galaxies are known to host giant clumps, whose nature and role in galaxy evolution are yet to be understood. In this work we first present a new method based on neural networks to…

We present so far the highest resolution ($\sim$0.04") ALMA 1.3 mm continuum observations of three massive star-forming clumps in the Central Molecular Zone, namely 20 km s$^{-1}$ C1, 20 km $^{-1}$ C4, and Sgr C C4, which reveal prevalent…

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 of what we know about the formation of stars, and essentially everything we know about the formation of planets, comes from observations of our solar neighborhood within 2 kpc of the Sun. Before 2018, accurate distance measurements…

Astrophysics of Galaxies · Physics 2023-08-28 Catherine Zucker , João Alves , Alyssa Goodman , Stefan Meingast , Phillip Galli

We review recent work that investigates the formation of stellar clusters, ranging in scale from globular clusters through open clusters to the small scale aggregates of stars observed in T associations. In all cases, recent advances in…

Astrophysics · Physics 2007-05-23 Cathie J. Clarke , Ian A. Bonnell , Lynne A. Hillenbrand

Stellar mass governs stellar evolution and the distribution of stellar masses plays a central role in the dynamical evolution of stellar clusters. Using high-precision astrometry and photometry from Gaia DR3, we investigate mass segregation…

Astrophysics of Galaxies · Physics 2026-05-27 Jeison Alfonso , Alejandro Garcia-Varela , Katherine Vieira

Understanding the formation and evolution of young star clusters requires quantitative statistical measures of their structure. We investigate the structures of observed and modelled star-forming clusters. By considering the different…

Astrophysics · Physics 2007-05-23 S. Schmeja , R. S. Klessen

Robust galaxy cluster mass estimates are fundamental for constraining cosmological parameters from counts. For this reason, it is essential to search for tracers that, independent of the cluster's dynamical state, have a small intrinsic…

Cosmology and Nongalactic Astrophysics · Physics 2023-12-19 Lia Doubrawa , Eduardo S. Cypriano , Alexis Finoguenov , Paulo A. A. Lopes , Matteo Maturi , Anthony H. Gonzalez , Renato Dupke

We investigate the importance of projection effects in the identification of galaxy clusters in 2D galaxy maps and their effect on the estimation of cluster velocity dispersions. A volume limited galaxy catalogue that was derived from a…

Astrophysics · Physics 2015-06-24 M. P. van Haarlem , C. S. Frenk , S. D. M. White

We present an innovative and widely applicable approach for the detection and classification of stellar clusters, developed for the PHANGS-HST Treasury Program, an $NUV$-to-$I$ band imaging campaign of 38 spiral galaxies. Our pipeline first…

Instance segmentation has witnessed promising advancements through deep neural network-based algorithms. However, these models often exhibit incorrect predictions with unwarranted confidence levels. Consequently, evaluating prediction…

Computer Vision and Pattern Recognition · Computer Science 2023-09-20 Qasim M. K. Siddiqui , Sebastian Starke , Peter Steinbach

We present a study of the spatial distribution of the stellar cluster populations in the star forming galaxy NGC 628. Using Hubble Space Telescope broad band WFC3/UVIS UV and optical images from the Treasury Program LEGUS (Legacy…

Present-day galaxy clusters are the largest virialized structures in the Universe, yet their early assembly remains poorly understood. At z$>$2, clusters in formation span tens of Mpc and host gas-rich, dust-obscured galaxies embedded in…

Thanks to its exceptional near-infrared photometry, JWST can effectively contribute to the discovery, characterization, and understanding of multiple stellar populations in globular clusters, especially at low masses where the Hubble Space…

Solar and Stellar Astrophysics · Physics 2024-07-04 M. Scalco , M. Libralato , R. Gerasimov , L. R. Bedin , E. Vesperini , D. Nardiello , A. Bellini , M. Griggio , D. Apai , M. Salaris , A. Burgasser , J. Anderson

We introduce a new clustering algorithm, MulGuisin (MGS), that can identify distinct galaxy over-densities using topological information from the galaxy distribution. This algorithm was first introduced in an LHC experiment as a Jet Finder…

Instrumentation and Methods for Astrophysics · Physics 2024-02-20 Young Ju , Inkyu Park , Cristiano G. Sabiu , Sungwook E. Hong

We infer the ages of three young stellar clusters, NGC 2004, NGC 7419, and NGC 2100, using Stellar Ages, a statistical algorithm designed to infer stellar population properties from color magnitude diagrams. Recent studies have revealed…