Circumstellar dust as a research area focuses on the physical, chemical, and dynamical properties of solid particles in the immediate environments of stars, including protoplanetary disks, debris disks, and evolved-star envelopes. Studies address dust grain composition, size distributions, formation and destruction processes, and radiative transfer effects that govern spectral energy distributions and polarization signatures. The field integrates observations from infrared to submillimeter wavelengths with laboratory astrochemistry and dust analog experiments, as well as hydrodynamic and magnetohydrodynamic simulations. It is central to understanding planet formation, disk evolution, stellar mass loss, and the feedback of stellar systems on the interstellar medium.
Evidence suggests that carbon nanotubes, tiny tubes consisting of pure carbon, could be forged in the envelopes of dust and gas surrounding dying stars. The findings propose a simple, yet elegant mechanism for the formation ...
Nanophysics
Jun 17, 2022
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Carbon nanostructures that formed in circumstellar envelopes around carbon-rich stars may have a shared chemical origin with soot particles produced by fuel combustion. The same reaction mechanism may underpin each process, ...
Nanophysics
May 16, 2022
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125
