Zobrazeno 1 - 10
of 55 290
pro vyhledávání: '"A, Saitoh"'
Metal-poor stars enriched by a single supernova (mono-enriched stars) are direct proof (and provide valuable probes) of supernova nucleosynthesis. Photometric and spectroscopic observations have shown that metal-poor stars have a wide variety of chem
Externí odkaz:
http://arxiv.org/abs/2411.18680
Autor:
Hirashima, Keiya, Moriwaki, Kana, Fujii, Michiko S., Hirai, Yutaka, Saitoh, Takayuki R., Makino, Junnichiro, Steinwandel, Ulrich P., Ho, Shirley
We introduce new high-resolution galaxy simulations accelerated by a surrogate model that reduces the computation cost by approximately 75 percent. Massive stars with a Zero Age Main Sequence mass of about 8 solar masses and above explode as core-col
Externí odkaz:
http://arxiv.org/abs/2410.23346
There are some traces of the existence of internal ocean in some icy moons, such as the vapor plumes of Europa and Enceladus. This implies a region of liquid water beneath the surface ice shell. Since liquid water would be essential for the origin of
Externí odkaz:
http://arxiv.org/abs/2410.20433
Autor:
Hirai, Yutaka, Beers, Timothy C., Lee, Young Sun, Wanajo, Shinya, Roederer, Ian U., Tanaka, Masaomi, Chiba, Masashi, Saitoh, Takayuki R., Placco, Vinicius M., Hansen, Terese T., Ezzeddine, Rana, Frebel, Anna, Holmbeck, Erika M., Sakari, Charli M.
We study the formation of stars with varying amounts of heavy elements synthesized by the rapid neutron-capture process ($r$-process) based on our detailed cosmological zoom-in simulation of a Milky Way-like galaxy with an $N$-body/smoothed particle
Externí odkaz:
http://arxiv.org/abs/2410.11943
Magneto-conductance in thin wires often exhibits complicated patterns due to the quantum interference of conduction electrons. These patterns reflect microscopic structures in the wires, such as defects or potential distributions. In this study, we p
Externí odkaz:
http://arxiv.org/abs/2409.02009
Autor:
Weber, Marius, Wust, Stephan, Haag, Luca, Akashdeep, Akashdeep, Leckron, Kai, Schmitt, Christin, Ramos, Rafael, Kikkawa, Takashi, Saitoh, Eiji, Kläui, Mathias, Šmejkal, Libor, Sinova, Jairo, Aeschlimann, Martin, Jakob, Gerhard, Stadtmüller, Benjamin, Schneider, Hans Christian
The recently discovered altermagnets exhibit collinear magnetic order with zero net magnetization but with unconventional spin-polarized d/g/i-wave band structures, expanding the known paradigms of ferromagnets and antiferromagnets. In addition to no
Externí odkaz:
http://arxiv.org/abs/2408.05187
Intermediate-mass black holes (IMBHs) are those between 100 and 10$^5$ solar masses ($M_{\odot}$); their formation process is debated. One possible origin is the growth of less massive black holes (BHs) via mergers with stars and compact objects with
Externí odkaz:
http://arxiv.org/abs/2406.06772
In recent years, the deterioration of artificial materials used in structures has become a serious social issue, increasing the importance of inspections. Non-destructive testing is gaining increased demand due to its capability to inspect for defect
Externí odkaz:
http://arxiv.org/abs/2405.16580
Autor:
Makiuchi, Takahiko, Kikkawa, Takashi, Sichanugrist, Thanaporn, Numata, Junki, Imai, Masaki, Chudo, Hiroyuki, Takahashi, Saburo, Saitoh, Eiji
Hybridized nuclear and electron spin excitation in a MnCO$_3$ crystal, a weakly-anisotropic antiferromagnet, has been investigated. In this material, the hyperfine interaction is strong enough to form a nuclear spin wave. We measure the microwave abs
Externí odkaz:
http://arxiv.org/abs/2405.08323
Recent exoplanet observations have revealed a diversity of exoplanetary systems, which suggests the ubiquity of radial planetary migration. One powerful known mechanism of planetary migration is planetesimal-driven migration (PDM), which can let plan
Externí odkaz:
http://arxiv.org/abs/2405.07279