Conveners
Session 8
- Tsuneo Noda (Kurume Institute of Technology)
Session 8
- Tsuneo Noda (Kurume Institute of Technology)
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Kazuyuki Sekizawa (Institute of Science Tokyo)02/05/2026, 09:00
Neutron stars can be regarded as natural laboratories to explore physics of many-nucleon systems from sub- to supra-saturation densities. We aim to understand various macroscopic astrophysical phenomena of neutron stars based on microscopic theories. In this talk, I will review recent activities in our nuclear theory group at Science Tokyo (see, e.g., Refs. [1-8]) and discuss selected topics...
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Valentin Allard (Yonsei University)02/05/2026, 09:35
Born from gravitational-core collapse supernovae, with initial temperatures as high as $\sim10^{12}$K, neutron stars cool down to temperatures $10^9$K within a few days, providing a unique opportunity to explore matter under extreme conditions. In particular, neutron stars contain nuclear superfluids whose presence is supported by observations of pulsar frequency glitches, rapid decline in...
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Tomoyuki Maruyama (College of Bioresource Sciences, Nihon University)02/05/2026, 10:10
The origin of ultra–high–energy cosmic rays (UHECRs), including the $2.44\times10^{20}$ eV event detected by AMATERAS, remains an open problem in astrophysics. Strong magnetic fields, such as those associated with magnetars, are expected to play an important role both in accelerating particles to ultra–high energies and in shaping the accompanying radiation. In such environments, synchrotron...
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Sachiko Tsuruta (Montana State Univrsity)02/05/2026, 11:00
We will review recent developments in the problems of thermal evolution of neutron stars and other related objects. Since the first discovery of a neutron star, over years we have seen significant developments in the understanding of these stars, through advancement in both theory and observation. Consequently, we now have better hope for the understanding of high density matter beyond the...
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Hao Sun (扬州大学)02/05/2026, 11:35
Employing relativistic energy density functionals PKDD, DD-ME2, and TW99 for nucleon-nucleon interactions, we investigate the impact of $\Delta$ resonances on the frequencies of non-radial $g$-mode oscillations in neutron stars adopting the universal coupling scheme. Our results show that when the proportion of $\Delta$ resonances in the neutron star interior reaches a certain threshold, the...
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Akira Dohi (RIKEN)02/05/2026, 11:55
The hot neutron star cools down due to the loss of neutrinos produced by the scattering of particles mainly inside the core, which enables us to probe the state of high-density matter through temperature observations. Recent X-ray observations have confirmed the existence of too cold
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isolated neutron stars beyond the standard cooling scenario without rapid cooling (i.e., minimal cooling... -
Keita Izumi (Kobe University)
Several indirect observations imply that the central compact object in the supernova SN 1987A is likely to be the youngest neutron star NS 1987A. Although no direct observation on the NS 1987A has been made yet, a future high-resolution X-ray satellite, such as the Lynx, could potentially detect its thermal emission. We investigate when the NS 1987A can be detected with the use of Lynx,...
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