2008/03/10 by K. M. Pitman, A. M. Hofmeister, A. B. Corman +2
Engineering · Physics and Astronomy · #Astrophysics and Star Formation Studies #Ionosphere and magnetosphere dynamics #Laser-induced spectroscopy and plasma #astro-ph
paper · pdf · doi:10.1051/0004-6361:20078468
12 pages; 10 figures; laboratory optical constants available from CDS. Accepted by Astronomy & Astrophysics
arxiv created 2008/03/10 · openalex publication_date 2008/03/11 · arxiv updated 2009/12/01 · openalex created_date 2022/10/03 · openalex updated_date 2026/07/31
Aims. The SiC optical constants are fundamental inputs for radiative transfer (RT) models of astrophysical dust environments. However, previously published values contain errors and do not adequately represent the bulk physical properties of the cubic (β) SiC polytype usually found around carbon stars. We provide new, uncompromised optical constants for β- and α-SiC derived from single-crystal reflectance spectra and investigate quantitatively (i) whether there is any difference between α- and β-SiC that can be seen in infrared (IR) spectra and optical functions and (ii) whether weak features from λ ~ 12.5-13.0 μm need to be fitted.