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The evolution of star clusters is largely affected by the tidal field generated by the host galaxy. It is thus in principle expected that under the assumption of an "universal" initial cluster mass function the properties of the evolved…

Astrophysics of Galaxies · Physics 2016-08-31 L. J. Rossi , K. Bekki , J. R. Hurley

Star cluster formation and assembly occurs inside filamentary and turbulent molecular clouds, which imprints both spatial and kinematic substructure on the young cluster. In this paper, we quantify the amount and evolution of this…

Astrophysics of Galaxies · Physics 2025-07-02 Edwin Laverde-Villarreal , Alison Sills , Claude Cournoyer-Cloutier , Veronica Arias Callejas

The physical conditions in molecular clouds control the nature and rate of star formation, with consequences for planet formation and galaxy evolution. The focus of this review is on the conditions that characterize regions of star…

Astrophysics · Physics 2009-10-31 Neal J. Evans

Projection tends to skew the mass-observable relation of galaxy clusters by creating a small fraction of severely blended systems, those for which the measured observable property of a cluster is strongly boosted relative to the value of…

Cosmology and Nongalactic Astrophysics · Physics 2012-04-04 Brandon M. S. Erickson , Carlos E. Cunha , August E. Evrard

We use a sample of close galaxy pairs selected from the Sloan Digital Sky Survey Data Release 4 (SDSS DR4) to investigate in what environments galaxy mergers occur and how the results of these mergers depend on differences in local galaxy…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 Sara L. Ellison , David R. Patton , Luc Simard , Alan W. McConnachie , Ivan K. Baldry , J. Trevor Mendel

We study the stellar cluster population in two adjacent fields in the nearby, face-on spiral galaxy, M83, using WFC3/HST imaging. The clusters are selected through visual inspection to be centrally concentrated, symmetric, and resolved on…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 N. Bastian , A. Adamo , M. Gieles , E. Silva Villa , H. J. G. L. M Lamers , S. S. Larsen , L. J. Smith , I. S. Konstantopoulos , E. Zackrisson

We investigate the formation of both clustered and distributed populations of young stars in a single molecular cloud. We present a numerical simulation of a 10,000 solar mass elongated, turbulent, molecular cloud and the formation of over…

Astrophysics of Galaxies · Physics 2015-05-19 Ian A. Bonnell , Rowan J. Smith , Paul C. Clark , Matthew R. Bate

Combining galaxy clustering information from regions of different environmental densities can help break cosmological parameter degeneracies and access non-Gaussian information from the density field that is not readily captured by the…

Close encounters between stars in star forming regions are important as they can perturb or destroy protoplanetary discs, young planetary systems, and stellar multiple systems. We simulate simple, viralised, equal-mass $N$-body star…

Astrophysics of Galaxies · Physics 2023-04-26 Krisada Rawiraswattana , Simon P. Goodwin

Close pairs of galaxies have been broadly studied in the literature as a way to understand galaxy interactions and mergers. In observations they are usually defined by setting a maximum separation in the sky and in velocity along the line…

Young massive clusters are as young as open clusters but more massive and compact compared with typical open clusters. The formation process of young massive clusters is still unclear, and it is an open question whether the formation…

Astrophysics of Galaxies · Physics 2015-06-23 Michiko S. Fujii

We analyze with hydrodynamical simulations the evolution of galaxy clusters in a cosmological environment. Power ratios (Buote \& Tsai 1995) are used to quantitatively relate cluster morphologies to their dynamical states. The simulated…

Astrophysics · Physics 2015-06-24 John C. Tsai , David A. Buote

Stars are thought to form predominantly within filamentary molecular clouds. Recent studies have suggested that active star formation, including the formation of stellar clusters and massive stars, occurs within so-called "hub" structures,…

Astrophysics of Galaxies · Physics 2026-05-21 Raiga Kashiwagi , Kazunari Iwasaki , Kohji Tomisaka , Tsuyoshi Inoue

We use catalogues of superclusters of galaxies from the 2dF Galaxy Redshift Survey to study the properties of galaxies in superclusters. We compare the properties of galaxies in high and low density regions of rich superclusters, in poor…

Star cluster formation in giant molecular clouds involves the local collapse of the cloud into small gas-rich subclusters, which can then subsequently collide and merge to build up the final star cluster(s). In this paper, we simulate…

Astrophysics of Galaxies · Physics 2022-05-25 Jeremy Karam , Alison Sills

We quantify the evolution of matter and galaxy clustering in cosmological hydrodynamical simulations via correlation and bias functions of matter and galaxies. We use simulations TNG100 and TNG300 with epochs from $z=5$ to $z=0$. We…

Cosmology and Nongalactic Astrophysics · Physics 2023-06-14 Jaan Einasto , Gert Hütsi , Lauri-Juhan Liivamägi , Changbom Park , Juhan Kim , Istval Szapudi , Maret Einasto

By virtue of their high galaxy space densities and their large spatial separations, clusters are efficient and accurate tracers of the large-scale density and velocity fields. Substantial progress has been made over the past decade in the…

Astrophysics · Physics 2007-05-23 Marc Postman

By using cosmological simulations, we studied the effects of galaxy interactionson the star formation activity in the local Universe. We selected galaxy pairs from the 3D galaxy distribution according to a proximity criterion. The 2D galaxy…

Astrophysics · Physics 2016-08-30 Josefa Perez , Patricia B. Tissera , Diego G. Lambas

Young stellar clusters harbour complex spatial structures emerging from the star formation process. Identifying stellar over-densities is a key step to constrain better how these structures are formed. The high accuracy of distances derived…

Astrophysics of Galaxies · Physics 2021-01-04 Timothé Roland , Christian M. Boily , Laurent Cambrésy

We study the formation and early evolution of star clusters that have a wide range of masses and background cloud mass surface densities, $\Sigma_{\rm cloud}$, which help set the initial sizes, densities, and velocity dispersions of the…

Astrophysics of Galaxies · Physics 2023-06-08 Juan P. Farias , Jonathan C. Tan
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