2006/09/05 by Akemi Tamanai, A. Tamanai, H. Mutschke +3 · 1 citation
Chemistry · Earth and Planetary Sciences · Physics and Astronomy · #Absorption (acoustics) #Absorption band #Amorphous solid #Analytical Chemistry (journal) #Astro and Planetary Science #Astrophysics and Star Formation Studies #Chemical engineering #Chemistry #Chromatography #Composite material #Crystallography #Geology #High-pressure geophysics and materials #Infrared #Infrared spectroscopy #Materials science #Mineralogy #Olivine #Optics #Particle (ecology) #Physics #Silicate #astro-ph
paper · pdf · doi:10.1086/508164
published as Astrophys.J.648:L147-L150,2006 · 5 pages, 3 figures, Accepted for publication in ApJL
openalex publication_date 2006/09/05 · arxiv created 2006/09/08 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The profile of the silicate 10 μm IR band contains important information about the evolutional stage of dust in circumstellar environments and the possible ongoing process of planetesimal formation. In order to extract this information, the observed band profiles are compared with calculated or laboratory-measured absorption cross sections of amorphous and crystalline grains with different sizes and compositions. We present in this study the first laboratory measurements of the 10 μm band profiles of nonembedded, i.e., free-flying, particles of amorphous and crystalline Mg 2 SiO 4 (with two different particle shapes), amorphous and crystalline MgSiO 3 , and crystalline olivine. We compare the spectra with those measured on embedded grains and discuss the potential of the new experimental method for comparison with observed spectra, as well as for future studies of agglomeration and surface manipulation of the grains.