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Cosmic Collisions

Dragon
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Cosmic Collisions Empty Cosmic Collisions

Post by Dragon Sun Nov 11, 2018 11:36 pm

The sun, like all stars, was born in a giant cold cloud of molecular gas and dust. It may have had dozens or even hundreds of stellar siblings – a star cluster – but these early companions are now scattered throughout our Milky Way galaxy. Although the remnants of this particular creation event have long since dispersed, the process of star birth continues today within our galaxy and beyond. Star clusters are conceived in the hearts of optically dark clouds where the early phases of formation have historically been hidden from view. But these cold, dusty clouds shine brightly in the infrared, so telescopes like the Stratospheric Observatory for Infrared Astronomy, SOFIA, can begin to reveal these long-held secrets.

Continued...
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Dragon
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Post by Dragon Sun Nov 11, 2018 11:38 pm

Cosmic Collisions Cloudcollision_fnl_lynettecook
Credits: NASA/SOFIA/Lynette Cook

Illustration of a star cluster forming from the collision of turbulent molecular clouds, which appear as dark shadows in front of the background galactic star field.

Source / Image Courtesy


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Dragon
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Post by Dragon Sun Nov 11, 2018 11:40 pm

Cosmic Collisions Cloudcollisionatomicenvelopes_fnl_lynettecook
Credits: NASA/SOFIA/Lynette Cook

Illustration of the molecular clouds surrounded by atomic envelopes, in green, which have been detected by SOFIA via emission from ionized carbon. The spatial offset and motions of these envelopes confirm predictions of simulations of cloud collisions.

Source / Image Courtesy


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Post by Dragon Sun Nov 11, 2018 11:41 pm



A simulation following the collapse and fragmentation of a 1000 solar mass cloud in a radius of 0.5 parsecs. the simulation produces 419 stars in approximately half a million years.

The stellar masses are in the range of 0.1 to 30 solar masses and follow a standard stellar initial mass function.


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