On the possibility of formation of dust grains in M-type photospheres

Details On the possibility of formation of dust grains in M-type photospheres On the possibility of formation of dust grains in M-type photospheres

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.194..805s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 194, Mar. 1981, p. 805-808.

Astronomy and Astrophysics

Astronomy

7

Atmospheric Models, Cosmic Dust, M Stars, Photosphere, Stellar Atmospheres, Stellar Evolution, Giant Stars, Granular Materials, Silicates, Stellar Models, Supergiant Stars

Scientific paper

Surface temperatures of late M-type stars of low mass and high luminosity are below the condensation temperature of corundum (Al2O3), as shown by taking properly into account the spherical extension of model photospheres for these objects. Therefore, the formation of the observed circumstellar silicate dust in M giants and supergiants with normal solar-type oxygen to carbon ratios might occur in their upper photospheres, contrary to previous expectations based on plane-stratified models.

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