Binary systems and stellar mergers in massive star formation

@article{Bonnell2005BinarySA,
  title={Binary systems and stellar mergers in massive star formation},
  author={Ian A. Bonnell and Matthew R. Bate},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2005},
  volume={362},
  pages={915-920}
}
  • I. Bonnell, M. Bate
  • Published 28 June 2005
  • Physics
  • Monthly Notices of the Royal Astronomical Society
We present a model for the formation of high-mass close binary systems in the context of forming massive stars through gas accretion in the centres of stellar clusters. A low-mass wide binary evolves under mass accretion towards a high-mass close binary, attaining system masses of the order of 30-50 M ○. at separations of the order of 1 au. The resulting high frequency of binary systems with two massive components is in agreement with observations. These systems are typically highly eccentric… 
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References

SHOWING 1-10 OF 47 REFERENCES
Accretion in stellar clusters and the collisional formation of massive stars
We present results from a numerical simulation of gas accretion in a cluster containing 1000 stars. The accretion forces the cluster to contract, leading to the development of a high-density core…
On the formation of massive stars
A B STR A CT We present a model for the formation of massive (Mz10 M>) stars through accretion-induced collisions in the cores of embedded dense stellar clusters. This model circumvents the problem…
The hierarchical formation of a stellar cluster
Recent surveys of star-forming regions have shown that most stars, and probably all massive stars, are born in dense stellar clusters. The mechanism by which a molecular cloud fragments to form…
The formation of close binary systems by dynamical interactions and orbital decay
We present results from the first hydrodynamical star formation calculation to demonstrate that close binary stellar systems (separations 10 au) need not be formed directly by fragmentation. Instead,…
Massive star formation: nurture, not nature
We investigate the physical processes that lead to the formation of massive stars. Using a numerical simulation of the formation of a stellar cluster from a turbulent molecular cloud, we evaluate the…
The Birth of High-Mass Stars: Accretion and/or Mergers?
The observational consequences of the merger scenario for massive star formation are explored and contrasted with the gradual accumulation of mass by accretion. In high-density protostar clusters,…
Competitive accretion in embedded stellar clusters
We investigate the physics of gas accretion in young stellar clusters. Accretion in clusters is a dynamic phenomenon as both the stars and the gas respond to the same gravitational potential.…
The Formation of Massive Stars from Turbulent Cores
Observations indicate that massive stars in the Galaxy form in regions of very high surface density, � � 1 gc m � 2 . Clusters containing massive stars and globular clusters have a column density…
Accretion in stellar clusters and the initial mass function
We present a simple physical mechanism that can account for the observed stellar mass spectrum for masses M∗≳0.5 M⊙. The model depends solely on the competitive accretion that occurs in stellar…
The physics of star formation
Our current understanding of the physical processes of star formation is reviewed, with emphasis on processes occurring in molecular clouds like those observed nearby. The dense cores of these clouds…
...
1
2
3
4
5
...