منابع مشابه
Runaway collisions in star clusters
We study the occurrence of physical collisions between stars in young and compact star cluster. The calculations are performed on the GRAPE-4 with the starlab software environment which include the dynamical evolution and the nuclear evolution of all stars and binaries. The selection of the initial conditions is based on existing and well observed star clusters, such as R136 in the 30 Doradus r...
متن کاملWolf-Rayet and O Star Runaway Populations from Supernovae
We present numerical simulations of the runaway fractions expected amongst O and WolfRayet star populations resulting from stars ejected from binaries by the supernova of the companion. Observationally the runaway fraction for both types of star is similar, prompting the explanation that close dynamical interactions are the main cause of these high-velocity stars. We show that, provided that th...
متن کاملRunaway collisions in young star clusters. I. Methods and tests
We present the methods and preparatory work for our study of the collisional runaway scenario to form a very massive star (VMS, M∗ > 400M⊙) at the centre of a young, compact stellar cluster. In the first phase of the process, a very dense central core of massive stars (M∗ ≃ 30− 120M⊙) forms through mass segregation and gravothermal collapse. This leads to a collisional stage, likely to result i...
متن کاملRunaway collisions in young star clusters. II. Numerical results
We present a new study of the collisional runaway scenario to form an intermediatemass black hole (IMBH, MBH & 100M⊙) at the centre of a young, compact stellar cluster. The first phase is the formation of a very dense central core of massive stars (M∗ ≃ 30 − 120M⊙) through mass segregation and gravothermal collapse. Previous work established the conditions for this to happen before the massive ...
متن کاملGravitational Runaway and Turbulence Driving in Star-gas Galactic Disks
Galactic disks consist of both stars and gas. The gas is more dynamically responsive than the stars, and strongly nonlinear structures and velocities can develop in the interstellar medium even while stellar surface density perturbations remain fractionally small. Yet, the stellar component still significantly influences the gas. We use two-dimensional numerical simulations to explore formation...
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ژورنال
عنوان ژورنال: Nature Physics
سال: 2014
ISSN: 1745-2473,1745-2481
DOI: 10.1038/nphys2993