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Radio Astronomy Group, Institute of Astronomy, the University of Tokyo
The present-day universe is filled with galaxies that are diverse in terms of mass, shape, and activity. Elucidating the mechanism of their formation and evolution and understanding the origins of this diversity is one of the most important challenges in contemporary astronomy. We focus on the characteristics of observations from radio waves to millimeter/sub-millimeter waves, namely the rich molecular and atomic spectral lines, the negative K-correction effect in the thermal dust emission, and the Sunyaev-Zeldovich (SZ) effect. We are advancing observational studies based on ALMA, which operates in the Atacama desert in Chile. Furthermore, we utilize radio and sub/millimeter-wave telescopes both domestically and internationally, such as ASTE, Nobeyama, IRAM, JCMT, LMT, and JVLA. We also collaborate with optical and infrared telescopes like JWST, HST, Spitzer, Subaru, and the soon-to-be-operational TAO, as well as X-ray observations like Chandra, to make the most of data from a wide range of wavelengths. Our current research themes include exploring distant galaxies by combining ALMA and the gravitational lensing effect and studying their structures, the interstellar matter and its dynamics in spiral and barred spiral galaxies, statistical studies of molecular clouds in nearby galaxies and the Milky Way, the properties of galaxies hosting transient objects such as gamma-ray bursts, super luminous supernovae, and fast radio bursts, and observational studies of the interplay between super-massive black holes and galaxies in radio galaxies and quasars, among others. We are also promoting the development of equipment and technologies to open new horizons, such as the on-chip ultra-wideband spectroscopy system DESHIMA using superconducting direct detectors, the 2-mm band heterodyne receiver system B4R, and the millimeter/sub-millimeter multi-color camera for SZ effect observation, in collaboration with research institutions both in Japan and overseas.
Members (as of October 2024)
| Name | Position/Year | Research Topic | |
|---|---|---|---|
| KOHNO Kotaro | Professor | Active galaxies, high-redshift galaxies, galaxy clusters, galaxy surveys, millimeter/submillimeter-wave instrument development, etc. | kkohno |
| EGUSA Fumi | Associate Professor | Dynamics of gas in disk and barred galaxies, giant molecular clouds, star formation, etc. | fegusa |
| MOROKUMA-MATSUI Kana | Assistant professor | Star-formation laws and environmental effects, AGN feedback, transients and time-domain astronomy | kanamoro |
| NISHIMURA Yuri | Project-appointed Assistant professor | observational studies of ISM in galaxies, astrochemistry, development of superconducting device | yuri |
| ZHU Danlei | D3 (University of Science and Technology of China) | Observational study of galaxies (host: F. Egusa) | |
| TSUJITA Akiyoshi | D2 | Study of galaxy and SMBH evolution using gravitational lensing | tsujita |
| INOUE Shuhei | D1 | Development of a multi-color millimeter/submillimeter camera aiming at observational study of galaxy cluster SZ effect, especially the development of planar Magic-T (co-supervisor: OSHIMA Tai, Assistant Professor, National Astronomical Observatory of Japan) | sinoue |
| MATSUSAKA Ren | D1 | ISM in the Milky Way and galaxies, supervisor: F. Egusa | rmatsusaka |
| YAMANAKA Itsuki | M2 | Molecular gas and star formation in Fast Radio Burst (FRBs) and Super-Luninous Super Novae (SLSNe) host galaxies, co-supervisor: B. Hatsukade (NAOJ) | yamanaka |
| NAGATA Maki | M1 | High velocity molecular clouds in M83, supervisor: F. Egusa | nagatamaki |
Professor Emeritus
| Name | Position/Year | Research Topic | |
|---|---|---|---|
| SOFUE Yoshiaki | Professor Emeritus | Galaxy, ISM, and Radio Astronomy | sofue |
Alumni, Visitors
| Name | Position/Year | Research Topic | |
|---|---|---|---|
| Gabriel LARUELLE | M1 (Institut Polytechnique de Paris) (Special Research Student at ILANCE; April-July 2024) | Observational study of high velocity molecular clouds in galaxies using PHANGS-ALMA | |
| Victor KADRI | M1 (Institut Polytechnique de Paris) (Special Research Student at ILANCE; April-July 2024) | Observational study of high-redshift radio galaxies using Subaru/HSC and VLA-FIRST | |
| MAEDA Fumiya | JSPS Postdoctoral Fellow (Host: Egusa) ==> Osaka Electro-Communication University since 2024 April | Observational study of molecular gas and star formation in barred galaxies | fmaeda |
| FUJITA Shinji | Research Associate (Host: Egusa) ==> Institute of Statistical Mathematics, Project-appointed researcher ==> Project-appointed assitant professor since 2024 April | Molecular gas and star formation in the Milky Way and nearby galaxies, machine learning, instrument/software development | fujita.shinji |
| HATSUKADE Bunyo | Visiting Researcher (National Astronomical Observatory of Japan/Associate Professor) until FY2023 | Observational study of submillimeter galaxies, gravitational lens galaxies, GRB host galaxies, superluminous supernovae, Fast Radio Bursts and their host galaxies, variable objects, etc. | hatsukade |
| UNO Shinsuke | Ph.D. 2024 March ==> Research Fellow (RIKEN) | Observational study of galaxy clusters by SZE effect, development of millimeter/submillimeter optical devices using FPC technology (co-supervisor: OSHIMA Tai, Assistant Professor, National Astronomical Observatory of Japan) | uno |
| HUANG Shuo | Ph.D. 2024 March ==> postdoc researcher (Nagoya Univ.) | Observational study of submillimeter galaxies based on multi-wavelength SED analysis (co-supervisor: KAWABE Ryohei, Professor, National Astronomical Observatory of Japan) | shuohuang |
| YOSHIMURA Yuki | Completed Ph.D. program July 2023 ==> (Collaborator) | Molecular chemical composition and its evolution on molecular cloud and galactic scales, star cluster formation | |
| Mouad GNAOUI | M1 (Institut Polytechnique de Paris) (Special Research Student at ILANCE; April-July 2023) | Observational study of high-redshift galaxies using JWST and ALMA | |
| KANG Haoran | Ph.D. in Science May 2023 ==> Postdoc (NAOJ) | Developmental study of wide-field observation systems using heterodyne receivers (co-supervisor: Professor Alvaro GONZALEZ, National Astronomical Observatory of Japan) | |
| LEE Kianhong | Ph.D. in Science September 2022 ==> Postdoc (IoA/University of Tokyo) ==> ALMA Joint Scientific Research Program postdoc (National Astronomical Observatory of Japan) from January 2023 | Molecular gas and star formation in high-redshift radio galaxies, study of radio-loudness in HSC-selected low-luminosity quasars | |
| Morokuma-Matsui Kana | JSPS Research Fellow (RPD) ==> Research Fellow (University of Tsukuba) from December 2022 | Galaxy structure and evolution, time-variable objects, study of galaxies (BCG) in galaxy clusters | kanamoro |
| CHIN Kah Wuy | Completed Ph.D. program September 2022 ==> Employed (Device) October 2022 | Development of millimeter and submillimeter wave observation equipment using superconducting devices (co-supervisors: Professor KAWABE Ryohei, Assistant Professor OSHIMA Tai (National Astronomical Observatory) | |
| NISHIMURA Yuri | ALMA Joint Scientific Research Program postdoc April 2017 - March 2022 ==> University of Tokyo Department of Astronomy | Interstellar matter, molecular chemical composition in low-metallicity galaxies, infrared galaxies, gravitationally lensed quasars | |
| YAMAGISHI Mitsuyoshi | ALMA Joint Scientific Research Program postdoc April 2021 - March 2022 ==> TAO Group (IoA) | Study of interstellar physics in the photo-dissociation region | yamagishi |
| YAMASHITA Yui | Ph.D. in Science March 2022 ==> Employed (Telecommunications) | Study of radio-loud quasars with supercritical accretion, active galactic nuclei, AGN feedback, survey of millimeter-wave emission line galaxies | |
| BAO Min (Nanjing Normal University D2/D3) | Special Research Student January 2021 - March 2022 | Observational study of interstellar matter in starburst galaxies, especially outflow (co-supervisors: HARADA Nanase, Assistant Professor at National Astronomical Observatory of Japan; EGUSA Fum) | |
| ISHIDA Tsuyoshi | Completed Ph.D. program March R3.3 ==> Employed (Information Systems) | Development of a new image reconstruction method, GLEAN, for gravitationally lensed objects and study of explosive star formation based on it | |
| WANG Tao | ALMA Joint Scientific Research Program postdoc April 2017 - December 2020 ==> Full Professor at Nanjing University (January 2021-) | Galaxy evolution in high-density environments, active galaxies | |
| TAKEKOSHI Tatsuya | Project Assistant Professor ==> Assistant Professor at Kitami Institute of Technology / MEXT Leading Initiative for Excellent Young Researchers (from November 2020) | Study of Magellanic Clouds, development of superconducting fiber end sensors (TES) multicolor camera, development of kinetic inductance detector (KID) ultra-wideband spectrometer, etc. | |
| TOSAKI Tomoka (Professor at Joetsu University of Education) | Visiting Researcher (October 2019 - March 2020) | Observational study of interstellar matter in galaxies | |
| GAO Yulong (University of Science and Technology of China/D3) | Special Research Student (September 2019 - August 2020) Accepting Faculty: EGUSA Fumi | Observational study of interstellar matter in galaxies | |
| MIZUKOSHI Shoichiro | B4, Research Project (April 2019 - March 2020) ==> Graduate School of Science, Minezaki Laboratory | Study of interstellar matter and explosive star formation in submillimeter galaxies | |
| GU Yizhou (Nanjing Normal University) | Visiting Special Research Student (September-December 2019) | Study of galaxy evolution using ALMA and HST data | |
| SATO Masako | Ph.D. program ==> Left the program in March H31 (Ph.D. student at Chalmers University of Technology, Sweden) | Study of H2S and sulfur-related molecules on a galactic scale | |
| YAMAGUCHI Yuki | Ph.D. in Science March H31 ==> Employed (Communications) | Study of constraints on CO, [CII] luminosity functions in high-redshift galaxies using ALMA, physical and chemical states of dust-enshrouded galaxies using Herschel, identification of ALMA-selected galaxies | |
| TANIGUCHI Akio | Ph.D. in Science March H30.3 ==> postdoc, Project Assistant Professor (Nagoya University) | Development of novel data scientific methods for observations and data analysis in radio astronomy; diagnosis of physical state in the active galaxy NGC1068, study of ultra-luminous submillimeter galaxies | |
| ANDO Ryo | Master's March H30.3 ==> Employed (Publishing) | Study of molecular absorption line systems in the millimeter and submillimeter bands using ALMA, study of interstellar matter in starburst galaxies | |
| TAMURA Yoichi | Assistant Professor ==> Associate Professor/Professor at Nagoya University (from April 2017) | high-redshift galaxies, gravitationally lensed galaxies, GRB reverse shock, molecular absorption line survey, instrument development, development of new spectroscopic observation methods | |
| ISHII Shun | Assistant Professor until H24 March ==> Assistant Professor at National Astronomical Observatory (from October 2016) | Development of Antarctic terahertz telescope, observational study of star-forming regions using portable submillimeter telescope, development of DESHIMA (especially readout circuit and data analysis method) | |
| UMEHATA Hideki | JSPS Research Fellow (PD), until March 2016 at ESO/Garching ==> Grant-in-Aid for Scientific Research Research Fellow ==> Basic Science Special Researcher at RIKEN; Visiting Collaborative Researcher (RIKEN→Cosmic Ray Research Institute) until March 2022, Visiting Collaborative Researcher ==> Assistant Professor at Nagoya University from April 2022 | Study of explosive star-forming galaxies hidden in dust in proto-clusters | |
| IZUMI Takuma | Ph.D. in Science March 2017 ==> National Astronomical Observatory of Japan Fellow (April 2017) ==> Assistant Professor, NAOJ-ALMA Project | Performance evaluation of cameras using superconducting transition-edge sensors, study of physical and chemical properties of molecular gas in active galaxies and its applications, study of high-redshift quasars and SMBH growth process | |
| KIKUCHIHARA Shotaro | B4, Research Project ==> Graduate School of Astronomy, Institute for Cosmic Ray Research | Study of the nature of star formation activity in Lyman Break galaxies in the gravitational lens galaxy cluster El Gordo | |
| MAKIYA Ryu | JSPS Research Fellow (PD) ==> Grant-in-Aid for Scientific Research Research Fellow (IPMU/Max Plank Institute For Astrophysics) from February 2016 | Study of galaxy formation and evolution process based on semi-analytical models | |
| IKARASHI Sou | JSPS Research Fellow (PD); until March 2015 at ESO/Garching - April 2015 Research Fellow at University of Tokyo ==> Postdoctoral scientist at Kapteyn Astronomical Institute, University of Groningen from May 2015 | Unbiased exploration of explosive star-forming galaxies hidden in dust in SXDF and SDF, gravitationally lensed ultra-luminous submillimeter galaxies | |
| FUJIMOTO Seiji | B4, Research Project ==> Institute for Cosmic Ray Research for Graduate School (April 2017) | Survey of high-redshift submillimeter galaxies using AzTEC/Herschel | |
| MINAMIDANI Tetsuhiro | Research Fellow (April-June 2013)==>Researcher at National Astronomical Observatory of Japan, Nobeyama Radio Observatory ==> Assistant Professor, NAOJ-Nobeyama | Study of massive star formation, software and receiver development | |
| SAKAI Takeshi | Special Assistant Professor (April 2009 - March 2013 (H25)) ==> Assistant Professor --> Professor at the University of Electro-Communications | Formation of massive stars, Infrared Dark Clouds (IRDC), Interstellar chemistry, Heterodyne receiver development | |
| SUZUKI Kenta | PhD (H25/March 2013) ==> Employed (Consulting) | Evolution of radio jets & starburst in dust-obscured regions of high-redshift proto-galaxy clusters; Development of millimeter and sub-millimeter cameras using superconducting transition edge sensors | |
| NAKAJIMA Taku | Researcher (April 2012 (H24) - May 2012) ==> Assistant Professor at Nagoya University STE Research | Molecular clouds, Planetary atmospheres, Interstellar molecular exploration in active galaxies, Heterodyne receiver development | |
| MIURA Rie | PhD (H24/May 2012) ==> Researcher at National Astronomical Observatory of Japan | Evolution of GMC and star formation in M33 | |
| TSUKAGOSHI Takashi | Researcher (Until March H24) ==> Researcher at Ibaraki University ==> NAOJ ==> Associate Professor, Ashikaga University | Star and planetary system formation, Software development | |
| INOUE Hirofumi | PhD (H24/March 2012) ==> Employed (Communications) | Development of submillimeter-wave superconducting receivers, Development of noise sources using superconducting devices | |
| HANDA Toshihiro | Assistant Professor (Until November 2010) ==> Professor at Kagoshima University | Milky Way galaxy & nearby galaxies, Software development | |
| YODA Takahiro | PhD (H23/March 2011) ==> Employed (Educator) | Galaxy surface survey by CO emission lines and the physical state of interstellar matter |