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Natalia Lahén (Max Planck Institute for Astrophysics, Garching, Germany)19/08/2024, 09:10Formation of dense stellar systems across cosmic timeTalk
Star clusters do not form in isolation, but enshrouded in hierarchical gaseous filaments embedded in a galactic tidal field. To understand the role of radiation, stellar winds and supernovae of massive stars in regulating the multiphase interstellar medium we must decipher how the young host clusters form, evolve and interact with their surrounding galactic environment. In this talk, I present...
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Floor van Donkelaar (Department of Astrophysics, University of Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland)19/08/2024, 09:30Formation of dense stellar systems across cosmic timeTalk
The GigaEris simulation is a cosmological, N-body hydrodynamical "zoom-in" simulation of the formation of a Milky Way-sized galaxy with the unprecedented resolution of better than a thousand solar masses, encompassing of order a billion particles within the refined region. The simulation employs a modern implementation of smoothed-particle hydrodynamics, including metal-line cooling and...
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Megan Allen (University of Sheffield)19/08/2024, 09:50Formation of dense stellar systems across cosmic timeTalk
Stars will typically spend the first few million years of their lives in their natal star-forming regions. The initial densities in these regions often mean young stars are much more likely to experience the effects of close encounters, massive star stellar winds and potentially even nearby supernovae. Therefore, understanding the dynamical evolution of star-forming regions is key to...
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Daniel Han (Yonsei University)19/08/2024, 10:10Formation of dense stellar systems across cosmic timeTalk
To understand the impact of radiation feedback during the formation of a globular cluster (GC), we simulate a head-on collision of two turbulent giant molecular clouds (GMCs). A series of idealized radiation-hydrodynamic simulations is performed, with and without stellar radiation or Type II supernovae. We find that a gravitationally bound, compact star cluster of mass $M_{GC} \sim 10^5...
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Mirek Giersz (Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences)19/08/2024, 10:55Formation of dense stellar systems across cosmic timeTalk
The formation of multiple populations of stars in globular clusters and their further evolution is still the subject of much debate and awaiting resolution. Many scenarios have been proposed to explain their formation. One of the most commonly proposed is the AGB scenario, in which chemically reprocessed gas from the envelopes of AGB stars mixes back with primary gas flowing into the center of...
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Maria Vittoria Legnardi (Università di Padova)19/08/2024, 11:15Formation of dense stellar systems across cosmic timeTalk
Globular clusters (GCs) are among the most fascinating objects in the Universe, but their formation and evolution remain a key challenge in astrophysics. These dense and compact agglomerates of stars are believed to have formed from the dense cores of super-giant molecular clouds during the earliest stages of galaxy formation. However, the environment in which GCs originated is still quite...
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Ugo Niccolò Di Carlo (SISSA)19/08/2024, 11:35Formation of dense stellar systems across cosmic timeTalk
Star clusters (SCs) are not born in spherical symmetry, contrary to the idealized initial conditions used in the vast majority of $N$-body simulations performed so far. Observations suggest that the initial conditions for star formation are highly structured and clumpy, both in the distribution of molecular gas from which stars form (Williams 1999 and references therein) and in the...
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Elena Lacchin (Universita' di Padova)19/08/2024, 11:55Formation of dense stellar systems across cosmic timeTalk
Initial conditions of stellar cluster simulations generally consist of a monolithic structure. However, both theoretical and observational studies suggest that stellar clusters form hierarchically and therefore host subclusters that could trigger stronger stellar interactions. Hence, it is fundamental to include more detailed initial conditions when studying the evolution of stellar clusters...
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Michael Fellhauer (Departamento de Astronomia, Universidad de Concepcion, Chile)19/08/2024, 12:15Formation of dense stellar systems across cosmic timeTalk
We have proposed a formation scenario for dSph galaxies which does not include any interaction with other galaxies, called the Dissolving Star Cluster Model. In this model the gas, accumulating inside the dark matter halo of the dwarf forms stars in form of small star clusters and associations which orbit the central region of the dark matter halo. These small entities do not survive for...
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