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Probing Cosmic Dust of the Early Universe through High-Redshift Gamma-Ray Bursts
S. L. Liang, Aigen Li
We explore the extinction properties of the dust in the distant universe through the afterglows of high-redshifted GRBs based on the "Drude" model which, unlike previous studies, d…
PAHs in Comets: An Overview
Aigen Li
Polycyclic aromatic hydrocarbon (PAH) molecules, ubiquitously seen in the interstellar medium (ISM) of our own and external galaxies, might have been incorporated into comets if th…
On the Crystallinity of Silicate Dust in the Interstellar Medium
M. P. Li, G. Zhao, Aigen Li
An accurate knowledge of the mineralogy (chemical composition and crystal structure) of the silicate dust in the interstellar medium (ISM) is crucial for understanding its origin i…
On Buckyonions as an Interstellar Grain Component
Aigen Li, J. H. Chen, M. P. Li +2
The carrier of the 2175 Angstrom interstellar extinction feature remains unidentified since its first detection over 40 years ago. In recent years carbon buckyonions have been prop…
Optical Properties of Dust
Aigen Li
Except in a few cases cosmic dust can be studied in situ or in terrestrial laboratories, essentially all of our information concerning the nature of cosmic dust depends upon its in…
On the Anomalous Silicate Emission Features of AGNs: A Possible Interpretation Based on Porous Dust
M. P. Li, Q. J. Shi, Aigen Li
The recent Spitzer detections of the 9.7 micron Si--O silicate emission in type 1 AGNs provide support for the AGN unification scheme. The properties of the silicate dust are of ke…