Apr 23 – 24, 2025
Koshiba Hall, Hongo Campus, The University of Tokyo
Asia/Tokyo timezone

Overview

From Quarks to Neutron Stars: Insights from kHz gravitational waves

April 23-24 2025

Koshiba Hall (小柴ホール)  in Faculty of Science Bldg.1 (理学部1号館) at Hongo-campus of U. Tokyo (東京大学本郷キャンパス

Astronomical observations of binary neutron star mergers and supernovae provide unique opportunities to explore physics spanning from quarks to neutron stars. The groundbreaking multi-messenger observation of GW170817, combining electromagnetic signals and gravitational waves, vividly demonstrated this potential. Furthermore, if a core-collapse supernova were to occur in our galaxy, it would likely become the first event where electromagnetic signals, neutrinos, and gravitational waves are detected together. The interior of neutron stars is not yet well understood due to their extreme density, where exotic states of matter may emerge. Gravitational waves, particularly in the kilohertz band, play a crucial role in extracting information about such ultra-high densities.

In recent years, several concepts for kilohertz-band gravitational wave detectors, such as Australia's NEMO, have been proposed to advance multi-messenger studies of high density astrophysical objects. KAGRA in Japan is also exploring upgrades aimed at enhancing high-frequency sensitivity, which could significantly improve sky localization accuracy and enable the detection of post-merger signals.

This workshop aims to explore the transformative potential of high-frequency gravitational wave observations for multi-messenger astrophysics, with a focus on their implications for nuclear and neutron star physics. The workshop aims to spark dynamic discussions and cultivate new collaborations among participants through invited talks by leading experts and engaging poster presentations.

Science topics

  • Nuclear physics
  • Neutron Stars
  • Neutron Star Mergers
  • Supernovae
  • Gravitational waves (both theory and experiment)
  • Electromagnetic observations
  • Neutrino astrophysics

Important dates

  • Deadline for poster abstract submission: March 21
  • Deadline for banquet registration (free for participation): March 21
  • Deadline for registration: April 18
  • Workshop: April 23 - 24 (planned for 9:00-18:00)
  • Banquet: April 23 evening (planned for 17:30-20:00)

 

Invited speakers (Confirmed)

  • Yoichi Aso (NAOJ)
  • Luca Baiotti (Osaka University)
  • Reiko Harada (RESCEU, University of Tokyo)
  • Kenta Hotokezaka (RESCEU, University of Tokyo)
  • Yasufumi Kojima (Hiroshima University)
  • Paul Lasky (Monash University)
  • Yuu Niino (IoA, University of Tokyo)
  • Nobuhiro Shimizu (ICEHAP, Chiba University)
  • Ling Sun (Australian National University)
  • Masaomi Tanaka (Tohoku University)
  • ...... and more to be confirmed

 

Co-hosted by:

  • Next-generation Neutrino Science and Multi-messenger Astronomy Organization (NNSO), The University of Tokyo
  • Quark Nuclear Science Institute (QNSI), The University of Tokyo
  • Research Center for the Early Universe (RESCEU), The University of Tokyo
  • RIKEN Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS)
  • JST ASPIRE program "RIKEN-Berkeley mathematical quantum science initiative" (PI: Tetsuo Hatsuda, Partner PI: Wick Haxton)
  • JST ASPIRE program "Japanese-Australian Gravitational Wave Collaboration: Quantum Control Technology for Pioneering Gravitational Wave Astronomy" (PI: Kentaro Somiya, Partner PI: David McClelland)

 

Organizing Committee
Masaki Ando (UTokyo/ASPIRE)
Shuntaro Aoki (RIKEN iTHEMS/ASPIRE)
Kenji Fukushima (UTokyo)
Tetsuo Hatsuda(RIKEN iTHEMS/ASPIRE)
Hirotaka Ito (RIKEN ABBL)
Takaaki Kajita (ICRR, UTokyo)
Yuta Michimura (RESCEU, UTokyo)
Akira Mizuta(RIKEN ABBL)
Soichiro Morisaki(ICRR, UTokyo)
Shigehiro Nagataki(RIKEN ABBL/iTHEMS)
Kentaro Somiya (Science Tokyo/ASPIRE)
Hajime Sotani(Kochi University/RIKEN iTHEMS)
Takahiro S Yamamoto(RESCEU, UTokyo)