Astrophysical Journal

The initial mass function

The gas and dust in giant molecular clouds gradually come together under the influence of gravity to form stars. Precisely how this occurs, however, is incompletely understood. The mass of a star, for example, is by far the ...

dateDec 11, 2017 in Astronomy
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Dusty protoplanetary disks

Planetary systems form out of disks of gas and dust around young stars. How the formation proceeds, however, is complex and poorly understood. Many physical processes are involved including accretion onto the star, photoevaporation ...

dateDec 08, 2017 in Astronomy
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Galaxy orbits in the local supercluster

A team of astronomers from Maryland, Hawaii, Israel, and France has produced the most detailed map ever of the orbits of galaxies in our extended local neighborhood, showing the past motions of almost 1400 galaxies within ...

dateDec 08, 2017 in Astronomy
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Neutron stars on the brink of collapse

When a massive star dies, its core contracts. In a supernova explosion, the star's outer layers are expelled, leaving behind an ultra-compact neutron star. For the first time, the LIGO and Virgo Observatories have recently ...

dateDec 05, 2017 in Astronomy
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Model of galaxy and star cluster formation corrected

When galaxy clusters and globular star clusters form, a phenomenon called "violent relaxation" occurs. After interacting intensely, the thousands or even millions of bodies reach a state of relative gravitational equilibrium ...

dateDec 04, 2017 in Astronomy
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