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Cosmic Dust IX
Hiroshi Kimura, Ludmilla Kolokolova, Aigen Li +3
This is an editorial to the special issue on Cosmic Dust IX.
On Graphene in the Interstellar Medium
X. H. Chen, Aigen Li, Ke Zhang
The possible detection of C_{24}, a planar graphene, recently reported in several planetary nebulae by Garciaa-Hernandez et al. (2011, 2012) inspires us to explore whether and how…
Interstellar Silicon Depletion and the Ultraviolet Extinction
Ajay Mishra, Aigen Li
Spinning small silicate grains were recently invoked to account for the Galactic foreground anomalous microwave emission. These grains, if present, will absorb starlight in the far…
The gas-to-extinction ratio and the gas distribution in the Galaxy
Hui Zhu, Wenwu Tian, Aigen Li +1
We investigate the relation between the optical extinction () and the hydrogen column density () determined from X-ray observations of a large sample of Galactic sightlin…
Detection of Polarized Infrared Emission by Polycyclic Aromatic Hydrocarbons in the MWC 1080 Nebula
Han Zhang, Charles M. Telesco, Thiem Hoang +5
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous in astrophysical environments, as revealed by their pronounced emission features at 3.3, 6.2, 7.7, 8.6, 11.3, and 12.7 m c…
Polycyclic Aromatic Hydrocarbons with Aliphatic Sidegroups: Intensity Scaling for the C-H Stretching Modes and Astrophysical Implications
Xuejuan Yang, Aigen Li, R. Glaser +1
The so-called unidentified infrared emission (UIE) features at 3.3, 6.2, 7.7, 8.6, and 11.3 m ubiquitously seen in a wide variety of astrophysical regions are generally attribut…