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Seimei KOOLS-IFU mapping of the gas and dust distributions in Galactic PNe: Unveiling the origin and evolution of Galactic halo PN H4-1
Masaaki Otsuka, Toshiya Ueta, Akito Tajitsu
H4-1 is a planetary nebula (PN) located in the Galactic halo, and is notably carbon-rich and one of the most metal-deficient PNe in the Milky Way. To unveil its progenitor evolutio…
Probing the origin of the two-component structure of broad line region by reverberation mapping of an extremely variable quasar
Shumpei Nagoshi, Fumihide Iwamuro, Satoshi Yamada +5
The physical origins of quasar components, such as the broad line region (BLR) and dust torus, remain under debate. To gain insights into them, we focused on Changing-State Quasars…
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…
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…
K-band High-Resolution Spectroscopy of Embedded Massive Protostars
Tien-Hao Hsieh, Michihiro Takami, Michael S. Connelley +7
A classical paradox in high-mass star formation is that powerful radiation pressure can halt accretion, preventing further growth of a central star. Disk accretion has been propose…
Graphene Molecules Contributing to the Infrared Bands of Carbon Rich Planetary Nebulae
Norio Ota, Aigen Li, Laszlo Nemes +1
It is well known since 2010 that fullerene C60 is widespread through the interstellar space. Also, it is well known that graphene is a source material for synthesizing fullerene. H…