Katsuya ABE

Katsuya ABE

Postdoc researcher

Chiba University, Japan

Biography

I’m a theoretical scientist in Chiba University. My main interest is the early stage of universe. I have so far focused on primordial perturbations on small scales as a unique probe of the early universe. One of my research topic is ultracompact minihalos, a direct consequence of particular dynamics of the early universe. I have proposed several approaches to ultracompace minihalos with use of cosmological observations. Primordial black hole and gravitational waves induced by scalar perturbations are also my research topics for the same reason as UCMHs. I’m from Gunma, Japan. I completed B.Sc. in Physics in 2018 and M.Sc. in Physics in 2020, and received Ph.D. in Physics from Nagoya University in March 2023.

Interests
  • Inflation
  • Ultracompact minihalos
  • Primordial blackholes
  • Gravitational waves
Education

  • PhD in the department of Physics, 2022

    Nagoya University

  • MSc in the department of Physics, 2020

    Nagoya University

  • BSc in the department of Physics, 2018

    Nagoya University

CAREER

 
 
 
 
 
Chiba University
Postdoc
Chiba University
April 2023 – Present Chiba, Japan
I work in the cosmology group with Prof. A, focusing particularly on the Hubble tension problem using the strong lensing effect.
 
 
 
 
 
Part-time Teacher
Shumei University
April 2024 – July 2024 Chiba, Japan
Teaching mechanics and quantum mechanics.
 
 
 
 
 
Part-time Teacher
Tokyo City University
April 2024 – July 2024 Tokyo, Japan
Teaching about physics experiments.
 
 
 
 
 
Nagoya University
JSPS Fellow (DC1)
Nagoya University
April 2020 – March 2023 Aichi, Japan
Project Name: Primordial black holes and small-scale perturbations in the precise observational cosmology
 
 
 
 
 
Program for Leading Graduate School, Nagoya University
PhD Professional Toryumon
Program for Leading Graduate School, Nagoya University
April 2018 – March 2020 Aichi, Japan

Education

 
 
 
 
 
Nagoya University
Ph.D in Physics
Nagoya University
April 2020 – March 2023 Aichi, Japan
Observational cosmology lab, a.k.a C-lab.
 
 
 
 
 
Nagoya University
M.Sc in Physics
Nagoya University
April 2018 – March 2020 Aichi, Japan
Observational cosmology lab, a.k.a C-lab.
 
 
 
 
 
Nagoya University
B.Sc in Physics
Nagoya University
April 2014 – March 2018 Aichi, Japan

Papers

Quickly discover relevant content by NASA/ADS, INSPIRE, and Arxiv.
Katsuya T. Abe, Hiroyuki Tashiro (2024). CMB lensing from early-formed dark matter halos. prd.

Cite DOI arXiv

Tom Broadhurst, Sung Kei Li, Amruth Alfred, Jose M. Diego, Paloma Morilla, Patrick L. Kelly, Fengwu Sun, Masamune Oguri, Hayley Williams, Rogier Windhorst, Adi Zitrin, Katsuya T. Abe, Wenlei Chen, Yoshinobu Fudamoto, Hiroki Kawai, Jeremy Lim, Tao Liu, Ashish K. Meena, Jose M. Palencia, George F. Smoot, Liliya L.~R. Williams (2024). Dark Matter distinguished by skewed microlensing in the ``Dragon Arc''. arXiv e-prints.

Cite DOI arXiv

Katsuya T. Abe, Hiroki Kawai, Masamune Oguri (2024). Analytic approach to astrometric perturbations of critical curves by substructures. prd.

Cite DOI arXiv

Yoshinobu Fudamoto, Fengwu Sun, Jose M. Diego, Liang Dai, Masamune Oguri, Adi Zitrin, Erik Zackrisson, Mathilde Jauzac, David J. Lagattuta, Eiichi Egami, Edoardo Iani, Rogier A. Windhorst, Katsuya T. Abe, Franz Erik Bauer, Fuyan Bian, Rachana Bhatawdekar, Thomas J. Broadhurst, Zheng Cai, Chian-Chou Chen, Wenlei Chen, Seth H. Cohen, Christopher J. Conselice, Daniel Espada, Nicholas Foo, Brenda L. Frye, Seiji Fujimoto, Lukas J. Furtak, Miriam Golubchik, Tiger Yu-Yang Hsiao, Jean-Baptiste Jolly, Hiroki Kawai, Patrick L. Kelly, Anton M. Koekemoer, Kotaro Kohno, Vasily Kokorev, Mingyu Li, Zihao Li, Xiaojing Lin, Georgios E. Magdis, Ashish K. Meena, Armin Nabizadeh, Johan Richard, Charles L. Steinhardt, Yunjing Wu, Yongda Zhu, Siwei Zou (2024). JWST Discovery of $40+$ Microlensed Stars in a Magnified Galaxy, the ``Dragon'' behind Abell 370. arXiv e-prints.

Cite DOI arXiv

Katsuya T. Abe, Yuichiro Tada (2023). Translating nano-Hertz gravitational wave background into primordial perturbations taking account of the cosmological QCD phase transition. prd.

Cite DOI arXiv

See all publications

Thesis

Probing Primordial Perturbations on Small Scales through Dark Matter Halos
Graduate School of Science, Nagoya University. Referees: Dr. Kiyotomo Ichiki (Supervisor), Dr. Junji Hisano (Chief Examiner), Dr. Shuichiro Inutsuka (Examiner), Dr. Yoichi Tamura (Examiner), Dr. Tsutomu Takeuchi (Examnier)
Katsuya Abe
Last updated on Jul 25, 2023
PDF
Probing Primordial Perturbations on Small Scales through Dark Matter Halos
CMB anisotropies on small scales induced by Primordial black holes
Division of Particle and Astrophysical Science, Graduate School of Science, Nagoya University. Supervisor: Dr. Kiyotomo Ichiki
Katsuya Abe
Last updated on Jul 25, 2023
PDF
CMB anisotropies on small scales induced by Primordial black holes

Conference

Cosmological contribution from Population III stars in ultracompact minihalos
My recent work
Jun 6, 2023 1:00 PM — Jun 7, 2023 3:00 PM Nagoya University
Katsuya Abe
Slides Follow
Cosmological contribution from Population III stars in ultracompact minihalos

Projects

*
All Deep Learning Other
PRML Journal club
Journal club for ``Pattern Recognition and Machine Learning".
PRML Journal club

Skills

C

100%

Python

90%

Boardgames

1000%

Gallery

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Popular Topics

Academic Astrophysics - Astrophysics of Galaxies Astrophysics - Cosmology and Nongalactic Astrophysics Astrophysics - High Energy Astrophysical Phenomena CMB cosmic background radiation cosmological phase transitions dark ages Deep Learning first stars General Relativity and Quantum Cosmology gravitational waves / sources High Energy Physics - Phenomenology inflation large-scale structure of Universe PBHs PHDthesis primordial black holes primordial gravitational waves (theory) reionization

Contact

Feel free to contact me if you have any questions