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Based on recent findings of a formation mechanism of substructure in tidal tails by Kuepper, Macleod & Heggie (2008) we investigate a more comprehensive set of N-body models of star clusters on orbits about a Milky-Way-like potential. We…

太阳与恒星天体物理 · 物理学 2015-05-14 A. H. W. Kuepper , P. Kroupa , H. Baumgardt , D. C. Heggie

High-redshift clusters of galaxies show an over-abundance of spirals by a factor of 2-3, and the corresponding under-abundance of S0 galaxies, relative to the nearby clusters. This morphological evolution can be explained by tidal…

天体物理学 · 物理学 2015-06-24 Oleg Y. Gnedin

We present direct $N$-body simulations of tidally filling 30,000 ${\rm M}_\odot$ star clusters orbiting between 10 kpc and 100 kpc in galaxies with a range of dark matter substructure properties. The time-dependent tidal force is determined…

星系天体物理 · 物理学 2019-08-21 Jeremy J. Webb , Jo Bovy , Raymond G. Carlberg , Mark Gieles

The rapidly improving quality and resolution of both low surface brightness observations and cosmological simulations of galaxies enables one to address the important question how the formation history is imprinted in the outer, unrelaxed…

星系天体物理 · 物理学 2024-06-21 Lucas M. Valenzuela , Rhea-Silvia Remus

Observations and simulations have demonstrated that star formation in galaxies must be actively suppressed to prevent the formation of over-massive galaxies. Galactic outflows driven by stellar feedback or supermassive black hole accretion…

Tidal structures around globular clusters provide valuable insights into cluster evolution and the hierarchical assembly of the Milky Way. Using wide-field imaging data from the DESI Legacy Survey combined with a color-magnitude…

星系天体物理 · 物理学 2026-02-24 Shouzhi Wang , Jundan Nie , Biwei Jiang , Hao Tian , Chao Liu , Ying-Hua Zhang

We use a simulation performed within the Constrained Local UniversE Simulation (CLUES) project to study a realistic Local Group-like object. We employ this group as a numerical laboratory for studying the evolution of the population of its…

We present a phenomenological description of the properties of tidal tails forming around dwarf galaxies orbiting the Milky Way. For this purpose we use collisionless N-body simulations of dwarfs initially composed of a disk embedded in an…

星系天体物理 · 物理学 2015-10-12 Ewa L. Lokas , Grzegorz Gajda , Stelios Kazantzidis

[Abridged] Within the hierarchical framework for galaxy formation, minor merging and tidal interactions are expected to shape all large galaxies to the present day. As a consequence, most seemingly normal disk galaxies should be surrounded…

Tidal interactions of galaxies in galaxy clusters have been proposed as one potential explanation of the morphology-density relation at low masses. The efficiency of tidal transformation is expected to depend strongly on the orbit of a…

星系天体物理 · 物理学 2015-04-15 Daniel Bialas , Thorsten Lisker , Christoph Olczak , Rainer Spurzem , Ralf Kotulla

According to the hierarchical formation paradigm, galaxies form through mergers of smaller entities and massive black holes (MBHs), if lurking at their centers, migrate to the nucleus of the newly formed galaxy, where they form binary…

星系天体物理 · 物理学 2024-09-25 Ludovica Varisco , Massimo Dotti , Matteo Bonetti , Elisa Bortolas , Alessandro Lupi

Most stars in galactic disks are believed to be born as a member of star clusters or associations. Star clusters formed in disks are disrupted due to the tidal stripping and the evolution of star clusters themselves, and as a results new…

星系天体物理 · 物理学 2015-06-11 M. S. Fujii , J. Baba

Long tails and streams of stars are the most noticeable upshots of galaxy collisions. Their origin as gravitational, tidal, disturbances has however been recognized only less than fifty years ago and more than ten years after their first…

宇宙学与河外天体物理 · 物理学 2015-06-03 Pierre-Alain Duc , Florent Renaud

In hierarchical models of galaxy formation, stellar tidal streams are expected around most, if not all, galaxies. Although these features may provide useful diagnostics of the $\Lambda$CDM model, their observational properties remain poorly…

We present N-body simulations of realistic globular clusters containing initial mass function in the galaxy to study effects of tidal field systematically on the properties of outer parts of globular clusters. Using NBODY6 which takes into…

天体物理学 · 物理学 2009-11-10 Kang Hwan Lee , Hyung Mok Lee , Hwankyung Sung

The orbital decay and tidal disruption of a star cluster in a galaxy is studied in an analytical manner. Owing to dynamical friction, the star cluster spirals in toward the center of the galaxy. Simultaneously, the galactic tidal field…

天体物理学 · 物理学 2009-11-07 H. Mouri , Y. Taniguchi

The semi-analytic theory of tidal shocks proves to be a powerful tool to study tidal interactions of star clusters and satellite galaxies with their massive hosts. New models of the globular cluster evolution employ a combination of…

天体物理学 · 物理学 2007-05-23 Oleg Y. Gnedin , Jeremiah P. Ostriker

We study the dependence of satellite star formation rate and morphology on group dynamics for a sample of SDSS groups. We classify the group dynamical state and study satellite properties for populations of galaxies at small and large…

星系天体物理 · 物理学 2017-03-22 Ian D. Roberts , Laura C. Parker

We use a combination of self-supervised machine learning and visual classification to identify tidal features in a sample of 34,331 galaxies with stellar masses $\log_{10}(M_{*}/\rm{M}_{\odot})\geq9.5$ and redshift $z\leq0.4$, drawn from…

星系天体物理 · 物理学 2025-09-24 A. Desmons , S. Brough , F. Lanusse , L. Canepa , A. Khalid

In the first paper we presented 27 hydrodynamical cosmological simulations of galaxies with total masses between $5 \times 10^8$ and $10^{10}\,\mathrm{M}_\odot$. In this second paper we use a subset of these cosmological simulations as…

星系天体物理 · 物理学 2017-11-08 Jonas Frings , Andrea V. Macciò , Tobias Buck , Camilla Penzo , Aaron A. Dutton , Aura Obreja , Marvin Blank