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Several observational and theoretical studies suggest that the initial mass function (IMF) slope for massive stars in globular clusters (GCs) depends on the initial cloud density and metallicity, such that the IMF becomes increasingly…

星系天体物理 · 物理学 2020-12-18 Hosein Haghi , Ghasem Safaei , Akram Hasani Zonoozi , Pavel Kroupa

The initial mass function (IMF) is an essential tool with which to study star formation processes. We have initiated the photometric survey of young open clusters in the Galaxy, from which the stellar IMFs are obtained in a homogeneous way.…

星系天体物理 · 物理学 2015-11-05 Beomdu Lim , Hwankyung Sung , Hyeonoh Hur , Byeong-Gon Park

The issue of cluster production in heavy-ion collisions is addressed in a new manner, by implementing cluster correlation into the quantum molecular dynamics (QMD) transport model. We demonstrate for the first time, the good potentialities…

核理论 · 物理学 2023-11-10 Hui-Gan Cheng , Zhao-Qing Feng

We study the effects of long range interactions on the phases observed in cohesive granular materials. At high vibration amplitudes, a gas of magnetized particles is observed with velocity distributions similar to non-magnetized particles.…

软凝聚态物质 · 物理学 2009-11-07 Daniel L. Blair , A. Kudrolli

We have selected a sample of eleven massive clusters of galaxies observed by the Hubble Space Telescope in order to study the impact of the dynamical state on the IntraCluster Light (ICL) fraction, the ratio of total integrated ICL to the…

We very briefly discuss proposed in the literature possible scenarios for intermediate mass black holes (IMBH) formation in globular clusters. We also discuss the results of the MOCCA simulations of about 2000 models (BigSurvey) regarding…

星系天体物理 · 物理学 2016-07-29 Mirek Giersz , Nathan Leigh , Arkadiusz Hypki , Abbas Askar , Nora Lützgendorf

Perturbing fluids of neutrons and protons (nuclear matter) may lead, as the most catastrophic effect, to the rearrangement of the fluid into clusters of nucleons. A similar process may occur in a single atomic nucleus undergoing a violent…

核理论 · 物理学 2018-05-23 P. Napolitani , M. Colonna , C. Mancini-Terracciano

An Antisymmetrized Molecular Dynamics model is used to explore the collision of $^{114}$Cd projectiles with $^{92}$Mo target nuclei at E/A=50 MeV over a broad range in impact parameter. The atomic number (Z), velocity, and emission pattern…

核理论 · 物理学 2009-11-11 S. Hudan , R. T. deSouza , A. Ono

The pasta phases are calculated for warm stellar matter in a framework of relativistic mean-field models, including the possibility of light cluster formation. Results from three different semiclassical approaches are compared with a…

Calculations for fission and cluster decay of $^{76}Sr$ are presented for this nucleus to be in its ground-state or formed as an excited compound system in heavy-ion reactions. The predicted mass distribution, for the dynamical collective…

核理论 · 物理学 2008-11-26 R. K. Gupta , M. K. Sharma , S. Singh , R. Nouicer , C. Beck

The nuclear-matter liquid-gas phase transition induces instabilities against finite-size density fluctuations. This has implications for both heavy-ion-collision and compact-star physics. In this paper, we study the clusterization…

核理论 · 物理学 2008-11-26 C. Ducoin , J. Margueron , Ph. Chomaz

Using molecular dynamics simulation, we investigate the slow dynamics of a supercooled binary mixture of soft particles interacting with a generalized Hertzian potential. At low density, it displays typical slow dynamics near its glass…

软凝聚态物质 · 物理学 2016-10-18 Ryoji Miyazaki , Takeshi Kawasaki , Kunimasa Miyazaki

The distribution of core radii of rich clusters in the Large Magellanic Cloud (LMC) systematically increases in both upper limit and spread with increasing cluster age. Cluster-to-cluster variations in the stellar initial mass function…

A class of extensions to the Standard Model adds hypothetical long-lived particles (LLPs) that have mass- or kinetic-mixing with neutral mesons, such as pions or rho mesons. The mixing can contribute significantly to the production of LLPs…

高能物理 - 唯象学 · 物理学 2025-09-25 Yehor Kyselov , Stephen Mrenna , Maksym Ovchynnikov

New models are presented for star-forming condensations in clusters. In each model, the condensation mass increases linearly with radius on small scales, and more rapidly on large scales, as in "thermal-nonthermal" models. Spherical…

星系天体物理 · 物理学 2015-05-28 Philip C. Myers

From a study of the integrated light properties of 200 globular clusters (GCs) in M31, Strader et al. found that the mass-to-light ratios are lower than what is expected from simple stellar population (SSP) models with a `canonical' stellar…

星系天体物理 · 物理学 2015-06-23 Rosemary L. Shanahan , Mark Gieles

The X-ray emission from clusters of galaxies is one of the best observational probe to investigate the distribution of dark matter at intermediate and high redshifts. Since the disposition of the intracluster plasma (ICP) responsible of the…

天体物理学 · 物理学 2007-05-23 P. Tozzi , A. Cavaliere , N. Menci

We simulate the central reactions of nearly symmetric, and asymmetric systems, for the energies at which the maximum production of IMFs occurs (E$_{c.m.}^{peak}$).This study is carried out by using hard EOS along with cugnon cross section…

核理论 · 物理学 2011-07-13 Aman D. Sood , Sukhjit Kaur

Within a microscopic statistical description of heavy ion collisions, we investigate the effect of the medium on the formation of light clusters. The dominant medium effects are self-energy corrections and Pauli blocking that produce the…

核理论 · 物理学 2009-11-06 C. Kuhrts , M. Beyer , P. Danielewicz , G. Roepke

Cosmological LambdaCDM TreeSPH simulations of the formation and evolution of galaxy groups and clusters have been performed. The simulations include: star formation, chemical evolution with non-instantaneous recycling, metal dependent…

天体物理学 · 物理学 2007-05-23 Alessio D. Romeo , J. Sommer-Larsen , L. Portinari