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- Hokkaido UniversityJP32 papers
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8 papers · 1 filter
The s-Process Nucleosynthesis in Extremely Metal-Poor Stars as the Generating Mechanism of Carbon Enhanced Metal-Poor Stars
Takuma Suda, Shimako Yamada, Masayuki Y. Fujimoto
The origin of carbon-enhanced metal-poor (CEMP) stars plays a key role in characterising the formation and evolution of the first stars and the Galaxy since the extremely-poor (EMP…
Phenomenological signatures of mixed complex scalar WIMP dark matter
Mitsuru Kakizaki, Akiteru Santa, Osamu Seto
We discuss phenomenological aspects of models whose scalar sector is extended by an isospin doublet scalar and a complex singlet scalar as an effective theory of supersymmetric mod…
Investigating the Circumstellar Disk of the Be Shell Star 48 Librae
J. Silaj, C. E. Jones, A. C. Carciofi +6
A global disk oscillation implemented in the viscous decretion disk (VDD) model has been used to reproduce most of the observed properties of the well known Be star Tau. 48 Lib…
Be discs in binary systems I. Coplanar orbits
Despina Panoglou, Alex C. Carciofi, Rodrigo G. Vieira +4
Be stars are surrounded by outflowing circumstellar matter structured in the form of decretion discs. They are often members of binary systems, where it is expected that the decret…
Relaxion window
Tatsuo Kobayashi, Osamu Seto, Takashi Shimomura +1
We investigate cosmological constraints on the original relaxion scenario proposed by Graham, Kaplan and Rajendran. We first discuss the appropriate sign choice of the terms in the…
Effect of Be Disk Evolution on Global One-Armed Oscillations
Finny Oktariani, Atsuo T. Okazaki, Chatief Kunjaya +1
We study the effect of density distribution evolution on the global one-armed oscillation modes in low viscosity disks around isolated and binary Be stars. Observations show that s…