Publications and Presentations
Publications and Presentations
Books:
"Galaxy Merger Identification Methods, and Investigations of the Role of Mergers in Galaxy Evolution", Kiyoaki Christopher Omori, Springer Nature, part of the Springer Theses Series, 2024
Springer
Amazon
First Author Publications:
Omori et al., "The Connection between Galaxy Mergers, Star Formation, and Active Galactic Nuclei Activity in the HSC-SSP", The Astrophysical Journal, Volume 989, Issue 1, id.73, 13 pp. August 2025. https://doi.org/10.3847/1538-4357/ade989
Omori et al., "Galaxy mergers in Subaru HSC-SSP: a deep representation learning approach for identification and the role of environment on merger incidence", Astronomy & Astrophysics, Article Number 142, Volume 679, November 2023. https://doi.org/10.1051/0004-6361/202346743
Kiyoaki Christopher Omori & Tsutomu T. Takeuchi, “The bimodality in the mass-metallicity relation in SDSS MaNGA galaxy pairs”, Astronomy and Astrophysics, Article Number 145, Volume 660, April 2022. https://doi.org/10.1051/0004-6361/202142858
Kiyoaki Christopher Omori & Tsutomu T. Takeuchi, “Spatially resolved properties of galaxies with a kinematically distinct core”, Astronomy and Astrophysics, Article Number 181, Volume 647, March 2021. https://doi.org/10.1051/0004-6361/202038244
Contributing Author Publications:
Takeuchi, T. T., Cooray, S., Yamagata, T. D., So, A. M., Uchida, S.-Y. S., Ikeda, S., Fukumizu, K., Kano, R. S., Omori, K. C., Ma, H.-X., Shi, W., Matsui, S. A., "New Quantification of Galaxy Evolution with Manifold Learning", Proceedings of the Institute of Statistical Mathematics, 2025, accepted.
Juan Pablo Alfonzo, Kartheik G. Iyer, Masayuki Akiyama, Greg L. Bryan, Suchetha Cooray, Eric Ludwig, Lamiya Mowla, Kiyoaki C. Omori, Camilla Pacifici, Joshua S. Speagle, and John F. Wu, "Katachi (形): Decoding the Imprints of Past Star Formation on Present-day Morphology in Galaxies with Interpretable CNNs", Astrophysical Journal, Jun 2024. https://doi.org/10.3847/1538-4357/ad3b95
Bottrell et al., "IllustrisTNG in the HSC-SSP: image data release and the major role of mini mergers as drivers of asymmetry and star formation" Monthly Notices of the Royal Astronomical Society, Volume 527, Issue 3, January 2024, Pages 6506–6539, https://doi.org/10.1093/mnras/stad2971
Tang et al., “Morphological asymmetries of quasar host galaxies with Subaru Hyper Suprime-Cam”,Monthly Notices of the Royal Astronomical Society, Volume 521, Issue 4, June 2023, Pages 5272–5297, https://doi.org/10.1093/mnras/stad877
Presentations:
2025:
August 2025 - 11th Galaxy Evolution Workshop - Nagoya, Japan (link)
Investigating clumpy galaxies at z > 5 with JWST observations (oral presentation)
June 2025 - CASCA 2025 - Halifax, Canada (link)
Investigating Clumpy Galaxies at z > 5 and their Physical Properties Using JWST (oral presentation)
May 2025 - International Workshop on Galaxy Formation + AGORA in Asia 2025 - Osaka, Japan (link)
Investigating the merger - star Formation - AGN connection in the HSC-SSP (oral presentation)
February 2025 - Saint Mary’s University Department of Astronomy and Physics Colloquium - Halifax, Canada
Identifying galaxy mergers in observational data and the impact of mergers on galaxy evolution (colloquium talk)
January 2025 - 2nd ICA Symposium - Halifax, Canada
Machine learning based identification of galaxy mergers and investigation on the role of mergers on galaxy evolution (oral presentation)
2024:
September 2024 - 2024 Autumn Annual Meeting of the Astronomical Society of Japan - Hyogo, Japan (link)
Impact of mergers on star formation and AGN activity in the HSC-SSP (oral presentation)
September 2024 - Tohoku University Colloquium - Sendai, Japan
Identification of galaxy mergers in the HSC-SSP and investigations on their role on galaxy evolution (special colloquium)
August 2024 - AGN across the sky: new windows opened by HSC and other wide-field surveys - Hokkaido, Japan (link)
The merger-AGN connection among HSC-SSP galaxies (oral presentation)
July 2024 - The Second SUPER-IRNET Workshop: Sparkling Our Collaboration at the Cosmic Gate - Oita, Japan (link)
Investigating the Merger-AGN Connection within HSC-SSP (oral presentation)
July 2024 - 2024 全国七夕講演会 宇宙への招待 - Ehime, Japan (link)
すばる望遠鏡観測で見る銀河の衝突合体 (invited talk)
March 2024 - 2024 Spring Annual Meeting of the Astronomical Society of Japan - Online (link)
Investigations on the merger-AGN connection within the HSC-SSP (oral presentation)
January 2024 - Ehime University Seminar - Ehime, Japan
Identification of Mergers in HSC-SSP and Effects of Environment on Galaxy Mergers (seminar)
2023:
December 2023 - Rironkon Symposium 2023 - Hirosaki, Japan (link)
Identification of Galaxy Mergers in HSC-SSP with Machine Learning and Investigations on their Roles on Galaxy Evolution (oral presentation)
December 2023 - Tokyo University Seminar - Tokyo, Japan
Machine learning galaxy properties (seminar)
November 2023 - First Stars First Galaxies 2023 - Sapporo, Japan (link)
Mergers and AGNs in the HSC-SSP: Do Mergers Trigger AGN Activity? (oral presentation)
November 2023 - HSC-AGN collaboration meeting 2023 - Ehime, Japan (link)
Identification of galaxy mergers within the HSC-SSP and an investigation on the relation between mergers and AGN activity (oral presentation)
October 2023 - 2023 EAST-ASIA SKA WORKSHOP - Seogwipo, Jeju Island, South Korea (link)
Merger Identification of AGNs in the HSC-SSP and Investigation of Optical and Radio Physical Properties (oral presentation)
September 2023 - CSIRO Space and Astronomy Special Co-Learnia - Marsfield ATNF Headquarters, Australia
Dilemmas of an Astro-PhD and Real-Life Applications of Research Methodology (Co-Learnia Talk)
September 2023 - Galaxy Transformation Across Space and Time - Canberra, Australia (link)
Galaxy Merger Identification in the HSC-SSP and Investigation of the Role of Mergers in Environment (oral presentation)
August 2023 - NECO School - Kyoto, Japan
Student Talk
August 2023 - APRIM 2023 - Fukushima, Japan (link)
Machine learning based approach for merger classification in HSC-SSP and quantitative investigations on the role of merger activity in galaxy evolution (oral presentation)
May 2023 - Astro Lunch Seminar @ MacMaster University - Hamilton, Canada
Galaxy merger identification in the HSC-SSP and an investigation on the role of environment in merger incidence (seminar)
May 2023 - New Eyes on the Universe: SKA and ngVLA - Vancouver, Canada (link)
Merger Identification and Investigation of Radio Galaxies in HSC-SSP/VLA/FIRST (poster presentation)
March 2023 - 2023 Spring Annual Meeting of the Astronomical Society of Japan - Tokyo, Japan (link)
Quantitative investigation of the impact of mergers in AGN activity in HSC-SSP (oral presentation)
February 2023 - Galaxy Evolution Workshop 2022 - Kyoto, Japan (link)
Machine learning based approach for merger classification in HSC-SSP and quantitative investigations on role of environment in merger activity (oral presentation)
2022:
December 2022 - Tracing the SMBH growth: outlook beyond the HSC-SSP, and future collaborations - Kagoshima, Japan (link)
CNN-based Approach for Merger Classification in HSC-SSP (oral presentation)
November 2022 - Machine Learning in Astrophysics - Nagoya, Japan (link)
Short Talk
October 2022 - Data Science in Astronomy 2022 - Tokyo, Japan (link)
Machine-Learning Based Approach for Merger Identification of Subaru-HSC Galaxies (oral presentation)
September 2022 - 2022 Autumn Annual Meeting of the Astronomical Society of Japan - Online (link)
A Machine-Learning Based Approach for Merger Identification in Subaru HSC (oral presentation)
July 2022 - APEC Seminar - Chiba, Japan (link)
The spatially-resolved MZR in SDSS-MaNGA Galaxy Pairs (seminar)
February 2022 - Galaxy Evolution Workshop 2021 - Online (link)
Investigation of Mass-Metallicity Relation (MZR) in SDSS-MaNGA Galaxy Pairs (oral presentation)
2021:
December 2021 - Galactic Star Formation 2021 - Online (link)
Spatially Resolved MZR in SDSS-MaNGA Galaxy Pairs (oral presentation)
September 2021 - 2021 Autumn Annual Meeting of the Astronomical Society of Japan - Online (link)
Spatially resolved mass-metallicity relation of SDSS-MaNGA galaxy pairs (oral presentation)
July 2021 - Japan SKA Consortium Science Strategy Workshop 2021 - Online (link)
Understanding galaxy evolution through investigation of spatially resolved star formation (oral presentation)
March 2021 - 2021 Spring Annual Meeting of the Astronomical Society of Japan - Online (link)
Identification and Investigation of Interacting Galaxies Using Spatially Resolved Kinematic Indicators (oral presentation)
February 2021 - Galaxy Evolution Workshop 2020 - Online (link)
Identification and Analysis of Interacting Galaxies Using Spatially Resolved Kinematics (oral presentation)
2020:
September 2020 - 2020 Autumn Annual Meeting of the Astronomical Society of Japan - Online (link)
Investigation of Galaxies with a Kinematically Distinct Core Using MaNGA Data (oral presentation)
March 2020 - 2020 Spring Annual Meeting of the Astronomical Society of Japan - Online (link)
Identification and Investigation of Interacting Galaxies Using Spatially Resolved Data (oral presentation)
2019:
November 2019 - The Art of Measuring Galaxy Physical Properties - Milano, Italy (link)
Investigating the Spatially Resolved Star Formation Histories of Interacting Galaxies using MaNGA Data (oral presentation)
November 2019 - First Stars and Galaxies Workshop - Nagoya, Japan (link)
Identifying Interacting Galaxies Using Dynamic Data and Investigating Spatially Resolved Star Formation Histories (poster presentation)
September 2019 - 2019 Autumn Annual Meeting of the Astronomical Society of Japan - Kumamoto, Japan (link)
Examining the Spatially Resolved Star Formation Histories of Local Interacting Galaxies (oral presentation)
September 2019 - SKA Japan Symposium 2019 - Tokyo, Japan (link)
HI-MaNGAを使った相互作用銀河の研究 (oral presentation)
August 2019 - 2019 天文・天体物理若手夏の学校 - Aichi, Japan (link)
MaNGA データを使った相互作用銀河の研究 (oral presentation)
June 2019 - Galaxy Evolution Workshop 2019 - Chiba, Japan (link)
Investigating the Star Formation History of Local Interacting Galaxies (oral presentation)
May 2019 - Data Science in Astronomy 2019 - Tokyo, Japan (link)
PCAを使用した衝突銀河の星形成史についての研究 (oral presentation)
March 2019 - 2019 Spring Annual Meeting of the Astronomical Society of Japan - Tokyo, Japan (link)
Investigation on Local Interacting Galaxies through Analysis of Star Formation Histories (poster presentation + short talk)
2018:
June 2018 - Galaxy Evolution Workshop 2018 - Ehime, Japan (link)
Investigating the properties of local interacting galaxies (poster presentation + short talk)