Mineral and organic particles in astronomy

Details Mineral and organic particles in astronomy Mineral and organic particles in astronomy

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ap%26ss.158..335w&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 158, no. 2, Aug. 1989, p. 335-346.

Astronomy and Astrophysics

Astrophysics

2

Cosmochemistry, Interstellar Matter, Nebulae, Organic Compounds, Silicon Oxides, Stellar Atmospheres, Absorption Spectra, Bacteria, Emission Spectra, Mira Variables, Radiation Pressure, Star Formation, Transmittance

Scientific paper

A mixture of inorganic mineral grains comprised mainly of silica with linked SiO4 tetrahedra together with organic grains characterized by the spectrum of an 'average' bacterium provides excellent agreement with astronomical data relating to broad 10- and 20-micron emission and absorption features. Mineral clay-like particles of radii about 0.01 micron are most likely to condense in the atmospheres of Mira-type stars and be expelled by radiation pressure into interstellar space. These particles would tend to stick onto the surfaces of bacterial grains in conditions of high density associated with regions of star formation.

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