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Spectroscopic evidence for a large spot on the dimming Betelgeuse
Sofya Alexeeva, Gang Zhao, Dong-Yang Gao +4
During October 2019 and March 2020, the luminous red supergiant Betelgeuse demonstrated an unusually deep minimum of its brightness. It became fainter by more than one magnitude an…
Magnetism of Fullerene C60 Compared with Graphene Molecule by DFT Calculation, Laboratory Experiment and Astronomical Observation
Norio Ota, Aigen Li, Laszlo Nemes +1
Magnetism of fullerene C60 was studied by three methods of the density functional theory (DFT) calculation, laboratory experiment and astronomical observation. DFT revealed that th…
Deuterated Polycyclic Aromatic Hydrocarbons in the Interstellar Medium: The C--D Band Strengths of Multi-Deuterated Species
X. J. Yang, Aigen Li, C. Y. He +1
Observationally, the interstellar gas-phase abundance of deuterium (D) is considerably depleted and the missing D atoms are often postulated to have been locked up into carbonaceou…
Compact pebbles and the evolution of volatiles in the interstellar comet 2I/Borisov
Bin Yang, Aigen Li, Martin A. Cordiner +6
The interstellar traveler, 2I/Borisov, is the first clearly active extrasolar comet, ever detected in our Solar system. We obtained high-resolution interferometric observations of…
Void defect induced magnetism and structure change of carbon material-2, Graphene molecules
Norio Ota, Aigen Li, Laszlo Nemes +1
Void-defect is a possible origin of ferromagnetic feature on pure carbon materials. In our previous paper, void-defect on graphene-nanoribbon show highly polarized spin configurati…
Void defect induced magnetism and structure change of carbon material-3, Polycyclic aromatic hydrocarbon
Norio Ota, Aigen Li, Laszlo Nemes
Void-defect induced magnetism of graphene molecule was recently reported in our previous paper of this series study. This paper investigated the case of hydrogenated graphene molec…