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A Data Scientific Approach to Elucidate Multi-scale Physics of Galaxies in the Cosmos

Research Project

Project/Area Number 22KJ1537
Project/Area Number (Other) 21J23611 (2021-2022)
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeMulti-year Fund (2023)
Single-year Grants (2021-2022)
Section国内
Review Section Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionNational Astronomical Observatory of Japan (2023)
Nagoya University (2021-2022)

Principal Investigator

COORAY Suchetha  国立天文台, 科学研究部, 特別研究員(PD)

Project Period (FY) 2023-03-08 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 2023: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2022: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2021: ¥800,000 (Direct Cost: ¥800,000)
KeywordsGalaxy formation / Cosmology / Machine learning / Galaxies / Magnetism / Machine Learning
Outline of Research at the Start

Propose a novel approach to develop a comprehensive model for the multi-scale physics of galaxies. Utilize a combination of multi-wavelength emissions, spatial information, and magnetic field data, augmented by advanced unsupervised machine learning techniques, to extract valuable insights from observational data. The primary objective is to establish a unified model that incorporates magnetism information alongside the processes influencing star formation. This endeavor aims to bridge gaps in our understanding of galaxies, enabling a more holistic view of their formation and evolution.

Outline of Annual Research Achievements

This research invloves building a data-driven model of galaxy formation. Key question include answering the connection betweek galaxies and their host dark matter halos, what is controlling the formation of stars, and what is driving the diversity of oberved galaxies from the past, current, and future galaxy surveys. Answering there question help us understand how our own galaxy Milky Way, and ultimately Earth formed and evolved. Understanding galaxies is also invaluable for understanding the cosmology as properties and their spatial distributions are key probes. Therefore a complete understanding of multi-scale physics is necessary. As for now, we do not have a suffiecnt model coming from first principles. Therefore, we aim to build a data-driven model as a first step.

Over the past year, my research has focused on building a new model of dust attenuation, which is necessary to understand the properties of galaxies more accurately from observations. I am now combining the dust model with a new galaxy formation model that understands the connection between the galaxy properties and dark matter. This will allow for more accurate simualtion of galaxies in the universe. In addition, I have made significant progress towards the goal of the project by building the network with foreign institutions. Consequently, that has allowed me to obtain a postdoctoral fellowship position at Stanford University after the period of the JSPS Fellowship. I will be further developing the new galaxy formation model at Stanford.

Report

(3 results)
  • 2023 Annual Research Report
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (44 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (39 results) (of which Int'l Joint Research: 15 results,  Invited: 18 results)

  • [Int'l Joint Research] University of Arizona(米国)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Photometric Observations and Period Analysis of an SU UMa-type Dwarf Nova, MASTER OT J004527.52+503213.82023

    • Author(s)
      Matsui, S. A. ; Takeuchi, T. T. ; Kono, K. T. ; Cooray, S.
    • Journal Title

      The Journal of the American Association of Variable Star Observers

      Volume: vol. 51, no. 1, p. 111 Pages: 3836-3836

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Characterizing and understanding galaxies with two parameters2023

    • Author(s)
      Cooray Suchetha、Takeuchi Tsutomu T、Kashino Daichi、Yoshida Shuntaro A、Ma Hai-Xia、Kono Kai T
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 524 Issue: 4 Pages: 4976-4995

    • DOI

      10.1093/mnras/stad2129

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Extracting an Informative Latent Representation of High-Dimensional Galaxy Spectra2023

    • Author(s)
      Iwasaki, Daiki ; Cooray, Suchetha ; Takeuchi, Tsutomu T.
    • Journal Title

      NeurIPS 2023

      Volume: arXiv:2311.17414 Pages: 1-6

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Wavelets and sparsity for Faraday tomography2022

    • Author(s)
      Cooray Suchetha、Takeuchi Tsutomu T、Ideguchi Shinsuke、Akahori Takuya、Miyashita Yoshimitsu、Takahashi Keitaro
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 75 Issue: Supplement_1 Pages: S85-S96

    • DOI

      10.1093/pasj/psac052

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] AI Methods in Galaxy Formation2024

    • Author(s)
      Cooray, Suchetha
    • Organizer
      AI@HEP Workshop - KEK
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] A Comprehensive Understanding of the Light from Galaxies2024

    • Author(s)
      Cooray, Suchetha
    • Organizer
      Astronomical Institute Colloquium - Tohoku University
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Empirical Galaxy Formation Modeling2024

    • Author(s)
      Cooray, Suchetha
    • Organizer
      NAOJ Dos + CfCA Workshop - Chiba, Japan
    • Related Report
      2023 Annual Research Report
  • [Presentation] Learning Representations of Galaxies2023

    • Author(s)
      Cooray, Suchetha
    • Organizer
      NAOJ Science Colloquium
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Simulating the Light of Observed Galaxies2023

    • Author(s)
      Cooray, Suchetha
    • Organizer
      KIPAC Tea Talk, Stanford University
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Future of Empirical Galaxy Formation Models2023

    • Author(s)
      Cooray, Suchetha
    • Organizer
      KIPAC Galaxy Formation & Cosmology Group Meeting - Stanford University
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] CRAFT: A New Faraday Tomography Technique2023

    • Author(s)
      Cooray, Suchetha
    • Organizer
      KIPAC Magnetism Group Meeting - Stanford University
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Realistic Simulation of the Light from Galaxies2023

    • Author(s)
      Cooray, Suchetha
    • Organizer
      HSC Medium Band Workshop - Nagoya, Japan
    • Related Report
      2023 Annual Research Report
  • [Presentation] A Forward Modeling Approach to Understanding the Light from Galaxies2023

    • Author(s)
      Cooray, Suchetha
    • Organizer
      BCCP/Cosmology Seminar - UC Berkeley
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A Forward Modeling Approach to Understanding the Light from Galaxies2023

    • Author(s)
      Cooray, Suchetha
    • Organizer
      CPAC Seminar - Argonne National Laboratory
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A Forward Modeling Approach to Understanding the Light from Galaxies2023

    • Author(s)
      Cooray, Suchetha
    • Organizer
      Survey Science Group Meeting - Chicago University
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Forward Modeling of Light from Galaxies2023

    • Author(s)
      Cooray, Suchetha
    • Organizer
      NYU CCPP Astro Seminar - New York University
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A Comprehensive Understanding of the Light from Galaxies2023

    • Author(s)
      Cooray, Suchetha
    • Organizer
      Astro Data Lab Seminar - Princeton University
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A Comprehensive Understanding of the Light from Galaxies2023

    • Author(s)
      Cooray, Suchetha
    • Organizer
      Galaxy Formation Group Meeting - Center for Computational Astrophysics, Flatiron Institute
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A Comprehensive Understanding of the Light from Galaxies2023

    • Author(s)
      Cooray, Suchetha
    • Organizer
      CAS Seminar - Center for Astrophysical Sciences, John Hopkins University
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A Comprehensive Understanding of the Light from Galaxies2023

    • Author(s)
      Cooray, Suchetha
    • Organizer
      Charlie Conroy’s Group Meeting - Harvard University
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A New Approach to Inferring Galaxy Physical Properties2023

    • Author(s)
      Cooray, Suchetha
    • Organizer
      Galaxy Workshop - Tokyo, Japan
    • Related Report
      2023 Annual Research Report
  • [Presentation] A Flexible Galaxy Formation Model for Field-level Inference2023

    • Author(s)
      Cooray, Suchetha
    • Organizer
      Observational Cosmology Workshop - Saga, Japan
    • Related Report
      2023 Annual Research Report
  • [Presentation] Application of machine learning in Faraday tomography2022

    • Author(s)
      Suchetha Cooray
    • Organizer
      Autumn Annual Meeting of Astronomical Society of Japan
    • Related Report
      2022 Annual Research Report
  • [Presentation] Disentangling the connection between present-day galaxies and their star formation histories2022

    • Author(s)
      Suchetha Cooray
    • Organizer
      Autumn Annual Meeting of Astronomical Society of Japan
    • Related Report
      2022 Annual Research Report
  • [Presentation] Disentangling galaxy star formation histories2022

    • Author(s)
      Suchetha Cooray
    • Organizer
      9th East Asian Numerical Astrophysics Meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Dimensionality Reduction to Understand Galaxies2022

    • Author(s)
      Suchetha Cooray
    • Organizer
      Data Science in Astronomy 2022 - Tokyo
    • Related Report
      2022 Annual Research Report
  • [Presentation] A Data-driven Model of Galaxy Star Formation Histories2022

    • Author(s)
      Suchetha Cooray
    • Organizer
      Observational Cosmology Workshop 2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] Generative Modeling for Galaxy Star Formation Histories2022

    • Author(s)
      Suchetha Cooray
    • Organizer
      Rironkon Symposium 2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] Understanding Galaxies through Dimensionality Reduction2022

    • Author(s)
      Suchetha Cooray
    • Organizer
      Machine Learning in Astrophysics
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Machine Learning-based Approach to Understanding Galaxies2022

    • Author(s)
      Suchetha Cooray
    • Organizer
      IPMU Astro Lunch Seminar
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Galaxy Manifold with SKA2022

    • Author(s)
      Suchetha Cooray
    • Organizer
      SKA-Japan Webinar Series
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Wavelets and Sparsity for Faraday Tomography2022

    • Author(s)
      Suchetha Cooray
    • Organizer
      SKA-Japan Workshop 2022
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Generative Model of Simulated Galaxies for Fitting Observed SEDs2022

    • Author(s)
      Suchetha Cooray
    • Organizer
      Spring Annual Meeting of Astronomical Society of Japan
    • Related Report
      2022 Annual Research Report
  • [Presentation] Learning representations of galaxies from simulations and observations2022

    • Author(s)
      Suchetha Cooray
    • Organizer
      Galaxy Formation and Evolution in the Data Science Era - Santa Barbara, USA
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Galaxy Manifold: A Unification of Observed Galaxy Properties2021

    • Author(s)
      Suchetha Cooray
    • Organizer
      Galaxy Evolution Workshop 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] An Iterative Reconstruction Algorithm for Faraday Tomography2021

    • Author(s)
      Suchetha Cooray
    • Organizer
      Science at Low Frequencies VIII
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Reconstructing Galaxy Star Formation History with Present-day Galaxy Manifold2021

    • Author(s)
      Suchetha Cooray
    • Organizer
      Spring Annual Meeting of Astronomical Society of Japan
    • Related Report
      2021 Annual Research Report
  • [Presentation] Wavelets and sparsity for solving the inverse problem in Faraday tomography2021

    • Author(s)
      Suchetha Cooray
    • Organizer
      Spring Annual Meeting of Astronomical Society of Japan
    • Related Report
      2021 Annual Research Report
  • [Presentation] Time Evolution on the Galaxy Manifold2021

    • Author(s)
      Suchetha Cooray
    • Organizer
      First Stars and First Galaxies Workshop 2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] Unmasking the unseen2021

    • Author(s)
      Suchetha Cooray
    • Organizer
      Sri Lanka Students’ Association in Japan Annual Research Conference
    • Related Report
      2021 Annual Research Report
  • [Presentation] Understanding Galaxy Evolution through Machine Learning2021

    • Author(s)
      Suchetha Cooray
    • Organizer
      Galactic Star Formation 2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] Understanding Galaxy Evolution through Machine Learning2021

    • Author(s)
      Suchetha Cooray
    • Organizer
      Autumn Annual Meeting of Astronomical Society of Japan
    • Related Report
      2021 Annual Research Report
  • [Presentation] An Iterative Reconstruction Algorithm for Faraday Tomography2021

    • Author(s)
      Suchetha Cooray
    • Organizer
      Autumn Annual Meeting of Astronomical Society of Japan
    • Related Report
      2021 Annual Research Report

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Published: 2021-05-27   Modified: 2024-12-25  

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