64 citations · 364 across the 9 of their papers we have counts for
9 papers
Sakurai's Object revisited: new laboratory data for carbonates and melilites suggest the carrier of 6.9 m excess absorption is a carbonate
J. E. Bowey, A. M. Hofmeister
We present new room-temperature 1100 - 1800 cm^{-1} spectra of melilite silicates and 600 - 2000 cm^{-1} spectra of three randomly orientated fine-grained carbonates to determine t…
Infrared Spectra of Pyroxenes (Crystalline Chain Silicates) at Room Temperature
J. E. Bowey, A. M. Hofmeister, E. Keppel
Pyroxene crystals are common in meteorites but few compositions have been recognized in astronomical environments. We present quantitative room-temperature spectra of 17 Mg-- Fe--…
Better Alternative to "Astronomical Silicate": Laboratory-Based Optical Functions of Chondritic/Solar Abundance Glass With Application to HD161796
A. K. Speck, K. M. Pitman, A. M. Hofmeister
"Astronomical" or "circumstellar" silicate optical functions (real and imaginary indices of refraction n and k have been previously derived from compositionally and structurally di…
Disordered Silicates in Space: a Study of Laboratory Spectra of "Amorphous" Silicates
Angela K. Speck, Alan G. Whittington, Anne. M. Hofmeister
We present a laboratory study of silicate glasses of astrophysically relevant compositions including olivines, pyroxenes and melilites. With emphasis on the classic Si-O stretching…
Optical constants of silicon carbide for astrophysical applications. II. Extending optical functions from IR to UV using single-crystal absorption spectra
A. M. Hofmeister, K. M. Pitman, A. F. Goncharov +1
Laboratory measurements of unpolarized and polarized absorption spectra of various samples and crystal stuctures of silicon carbide (SiC) are presented from 1200--35,000 cm…
Optical properties of silicon carbide for astrophysical applications I. New laboratory infrared reflectance spectra and optical constants
K. M. Pitman, A. M. Hofmeister, A. B. Corman +1
Silicon Carbide (SiC) optical constants are fundamental inputs for radiative transfer models of astrophysical dust environments. However, previously published values contain errors…
The effect of stellar evolution on SiC dust grain sizes
Angela Speck, Grant Thompson, Anne Hofmeister
Stars on the asymptotic giant branch (AGB) produce dust in their circumstellar shells. The nature of the dust-forming environment is influenced by the evolution of the stars, in te…
Temperature effects on the 15-85-micron spectra of olivines and pyroxenes
J. E. Bowey, C. Lee, C. Tucker +3
Far-infrared spectra of laboratory silicates are normally obtained at room temperature even though the grains responsible for astronomical silicate emission bands seen at wavelengt…
The SiC problem: astronomical and meteoritic evidence
A. K. Speck, A. M. Hofmeister, M. J. Barlow
Pre-solar grains of silicon carbide found in meteorites and interpreted as having had an origin around carbon stars from their isotopic composition, have all been found to be of th…