中文
相关论文

相关论文: On the star formation efficiencies and evolution o…

200 篇论文

The formation of globular clusters remains an open debate. Dwarf starburst galaxies are efficient at forming young massive clusters with similar masses as globular clusters and may hold the key to understanding their formation. We study…

In a series of three papers, we introduced a novel cluster formation model that describes the formation, growth, and disruption of star clusters in high-resolution cosmological simulations. We tested this model on a Milky Way-sized galaxy…

星系天体物理 · 物理学 2020-03-18 Hui Li , Oleg Gnedin

Open and globular star clusters have served as benchmarks for the study of stellar evolution due to their supposed nature as simple stellar populations of the same age and metallicity. After a brief review of some of the pioneering work…

星系天体物理 · 物理学 2015-05-14 Jason S. Kalirai , Harvey B. Richer

The young star clusters we observe today are the building blocks of a new generation of stars and planets in our Galaxy and beyond. Despite their fundamental role we still lack knowledge about the conditions under which star clusters form…

星系天体物理 · 物理学 2015-03-19 C. Olczak , R. Spurzem , Th. Henning , T. Kaczmarek , S. Pfalzner , S. Harfst , S. Portegies Zwart

In previous papers of this series, we developed a new algorithm for modeling the formation of star clusters in galaxy formation simulations. Here we investigate how dissolution of bound star clusters affects the shape of the cluster mass…

星系天体物理 · 物理学 2019-05-21 Hui Li , Oleg Y. Gnedin

This paper addresses the questions of what we have learned about how and when dense star clusters form, and what studies of star clusters have revealed about galaxy formation and evolution. One important observation is that globular…

天体物理学 · 物理学 2007-05-23 Stephen E. Zepf

By means of three-dimensional hydrodynamical simulations, we investigate the formation of second generation (SG) stars in young globular clusters of different masses. We consider clusters with a first generation of asymptotic giant branch…

星系天体物理 · 物理学 2022-01-05 A. Yaghoobi , F. Calura , J. Rosdahl , H. Haghi

We first present chemodynamical simulations to investigate how stellar winds of massive stars influence early dynamical and chemical evolution of forming globular clusters (GCs). In our numerical models, GCs form in turbulent,high-density…

天体物理学 · 物理学 2009-06-23 Kenji Bekki , Masashi Chiba

Young, massive star clusters are the most notable and significant end products of violent star-forming episodes triggered by galaxy collisions, mergers, and close encounters. The question remains, however, whether or not at least a fraction…

天体物理学 · 物理学 2009-11-11 Richard de Grijs

Recent precise determinations of the primordial He-abundance (Y_p) from cosmic microwave background (CMB) analyses and cosmological nucleosynthesis computations, provide Y_p=0.248$\pm$0.001. On the other hand, recent works on the initial…

天体物理学 · 物理学 2009-11-07 S. Cassisi , M. Salaris , A. W. Irwin

We review progress in numerical simulations of star cluster formation. These simulations involve the bottom-up assembly of clusters through hierarchical mergers, which produces a fractal stellar distribution at young (~0.5 Myr) ages. The…

星系天体物理 · 物理学 2015-05-14 Cathie Clarke

Star clusters are ideal tracers of star formation activity in systems outside the volume that can be studied using individual, resolved stars. These unresolved clusters span orders of magnitude in brightness and mass, and their formation is…

宇宙学与河外天体物理 · 物理学 2011-07-20 I. S. Konstantopoulos , K. Fedotov , S. C. Gallagher , A. Maybhate , P. R. Durrell , J. C. Charlton

We study the evolution of star clusters in the Galactic tidal field starting from their birth in molecular clumps. Our model clusters form according to the local-density-driven cluster formation model in which the stellar density profile is…

星系天体物理 · 物理学 2020-03-18 Bekdaulet Shukirgaliyev , Genevieve Parmentier , Peter Berczik , Andreas Just

The formation histories of globular clusters (GCs) are a key diagnostic for understanding their relation to the evolution of the Universe through cosmic time. We use the suite of 25 cosmological zoom-in simulations of present-day Milky…

星系天体物理 · 物理学 2019-05-15 Marta Reina-Campos , J. M. Diederik Kruijssen , Joel L. Pfeffer , Nate Bastian , Robert A. Crain

For the full galaxy mass range, we find that previously observed trends of globular cluster (GC) system scaling parameters (number, luminosity or mass of all GCs in a galaxy normalized to the host galaxy luminosity or mass, e.g. S_L) as a…

宇宙学与河外天体物理 · 物理学 2010-10-18 I. Y. Georgiev , T. H. Puzia , P. Goudfrooij , M. Hilker

Star formation plays a central role in the evolution of galaxies and of the Universe as a whole. Studies of star-forming regions in the local universe have shown that star formation typically occurs in a clustered fashion. Building a…

Star clusters are fundamental units of stellar feedback and unique tracers of their host galactic properties. In this review, we will first focus on their constituents, i.e.\ detailed insight into their stellar populations and their…

We investigate the influence of the external tidal field of a dark matter halo on the dynamical evolution of star clusters using direct N-body simulations, where we assume that the halo is described by a Navarro, Frenk & White mass profile…

星系天体物理 · 物理学 2009-09-28 A. K. Praagman , J. R. Hurley , C. Power

We investigate the early evolution of two distinct populations of low-mass stars in globular clusters under the influence of primordial gas expulsion driven by supernovae to study if this process can increase the fraction of second…

星系天体物理 · 物理学 2015-05-18 T. Decressin , H. Baumgardt , C. Charbonnel , P. Kroupa

Internal dynamical evolution can drive stellar systems into states of high central density. For many star clusters and galactic nuclei, the time scale on which this occurs is significantly less than the age of the universe. As a result,…

天体物理学 · 物理学 2009-06-23 Stephen L. W. McMillan