A 100-million-year simulation of Alpha Centauri ejecta finds that a small fraction can reach the Solar System, implying roughly a million 100-meter-scale objects in the Oort Cloud today if the system ejects at the Solar System's rate.
The possibility for panspermia in the galaxy by means of planetary dust grains
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abstract
By obtaining the assumption that planetary dust particles can escape from the gravitational attraction of a planet, we consider the possibility for the dust grains to leave the star's system by means of the radiation pressure. By taking the typical dust parameters into account, we consider their dynamics and show that they can reach the deep cosmos, taking part in panspermia. It has been shown that, during $5$ billion years, the dust grains will reach $10^5$ stellar systems, and by taking the Drake equation into account, it has been shown that the whole galaxy will be full of planetary dust particles.
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A Case Study of Interstellar Material Delivery: {\alpha} Centauri
A 100-million-year simulation of Alpha Centauri ejecta finds that a small fraction can reach the Solar System, implying roughly a million 100-meter-scale objects in the Oort Cloud today if the system ejects at the Solar System's rate.