Condensation of dust around a carbon star

Astronomy and Astrophysics – Astronomy

Scientific paper

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Carbon Stars, Condensing, Cosmic Dust, Graphite, Silicon Carbides, Stellar Envelopes, Nucleation, Red Giant Stars, Supergiant Stars, Surface Energy

Scientific paper

The efficiencies of various processes of dust formation in the envelopes of carbon stars are estimated (for IRC + 10216). It is concluded that there is sufficient gaseous C near the star for dust formation through homogeneous nucleation. The surface energy of particles of silicon carbide cosmic dust is estimated as 1600 erg/sq cm at T = 1000 K. It is possible that solid silicon carbide falls onto the surfaces of graphite grains.

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