Dark impact and galactic star formation: origin of the Gould belt

@article{Bekki2009DarkIA,
  title={Dark impact and galactic star formation: origin of the Gould belt},
  author={Kenji Bekki},
  journal={Monthly Notices of the Royal Astronomical Society: Letters},
  year={2009},
  volume={398}
}
  • K. Bekki
  • Published 28 June 2009
  • Physics
  • Monthly Notices of the Royal Astronomical Society: Letters
The Milky Way has a giant stellar structure in the solar neighbourhood, which has a size of ∼1 kpc, a mass of ∼106 M⊙ and a ring-like distribution of young stars. Fundamental physical properties of this local enigmatic structure, known as the Gould belt (GB), have not been reproduced by previously proposed models. We first show that the local enigmatic structure could have formed about 30 Myr ago as a result of a high-speed, oblique collision between a gas cloud with a mass of ∼106 M⊙ and a… 

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References

SHOWING 1-10 OF 23 REFERENCES

Massive Stars and Globular Cluster Formation

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

Impact of Dark Matter Subhalos on Extended H I Disks of Galaxies: Possible Formation of H I Fine Structures and Stars

Recent observations have discovered star formation activities in the extreme outer regions of disk galaxies. However, it remains unclear what physical mechanisms are responsible for triggering star

Hubble Space Telescope Imaging of a Peculiar Stellar Complex in NGC 6946

The stellar populations in a stellar complex in NGC 6946 are analyzed on images taken with the Wide Field Planetary Camera 2 on board the Hubble Space Telescope. The complex is peculiar because of

Clumps and streams in the local dark matter distribution

A simulation that resolves dark matter substructure even in the very inner regions of the Galactic halo is reported, finding hundreds of very concentrated dark matter clumps surviving near the solar circle, as well as numerous cold streams.

The Structure of cold dark matter halos

High resolution N-body simulations show that the density profiles of dark matter halos formed in the standard CDM cosmogony can be fit accurately by scaling a simple “universal” profile. Regardless

Giant Molecular Clouds in M33. II. High-Resolution Observations

We present 12CO (J = 1 → 0) observations of 45 giant molecular clouds (GMCs) in M33 made with the BIMA array. The observations have a linear resolution of 20 pc, sufficient to measure the sizes of

The Resolved Properties of Extragalactic Giant Molecular Clouds

We use high spatial resolution observations of CO to systematically measure the resolved size-line width, luminosity-line width, luminosity-size, and mass-luminosity relations of GMCs in a variety of

3D dynamical evolution of the interstellar gas in the Gould Belt

The dynamical evolution of the Gould Belt has been modelled in 3D and compared to the spatial and velocity distributions of all HI and H 2 clouds found within a few hundred parsecs from the Sun and

Mapping the substructure in the Galactic halo with the next generation of astrometric satellites

We run numerical simulations of the disruption of satellite galaxies in a Galactic potential to build up the entire stellar halo, in order to investigate what the next generation of astrometric

The Aquarius Project : the subhalos of galactic halos

We have performed the largest ever particle simulation of a Milky Way-sized dark matter halo, and present the most comprehensive convergence study for an individual dark matter halo carried out thus