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Nano Dust in Space and Astrophysics
Ingrid Mann, Aigen Li, Kyoko Tanaka
We summarize the Focus Meeting (FM10) "Nano Dust in Space and Astrophysics" held in Vienna, Austria on 28-29 August 2018 during the 30th General Assembly of the International Astro…
Graphene and Carbon Nanotubes in Space
X. H. Chen, Z. C. Xiao, Aigen Li +1
As the fourth most abundant element in the universe, carbon plays an important role in the physical and chemical evolution of the interstellar medium. Due to its unique property to…
Are the silicate crystallinities of oxygen-rich evolved stars related to their mass loss rates?
Biwei Jiang, Jiaming Liu, Aigen Li
A sample of 28 oxygen-rich evolved stars is selected based on the presence of crystalline silicate emission features in their ISO/SWS spectra. The crystallinity, measured as the fl…
The Widespread Presence of Nanometer-size Dust Grains in the Interstellar Medium of Galaxies
Yanxia Xie, Luis C. Ho, Aigen Li +1
Interstellar dust spans a wide range in size distribution, ranging from ultrasmall grains of a few Angstroms to micrometer-size grains. While the presence of nanometer-size dust gr…
A New Technique for Measuring Polycyclic Aromatic Hydrocarbon Emission in Different Environments
Yanxia Xie, Luis C. Ho, Aigen Li +1
We present a new method to decompose the emission features of polycyclic aromatic hydrocarbons (PAHs) from mid-infrared spectra using theoretical PAH templates in conjunction with…
Probing the 9.7μm Interstellar Silicate Extinction Profile through the Spitzer/IRS Spectroscopy of OB Stars
Z. Z. Shao, B. W. Jiang, Aigen Li +3
The 9.7m interstellar spectral feature, arising from the Si--O stretch of amorphous silicate dust, is the strongest extinction feature in the infrared (IR). In principle, the sp…