Keiichi Asada

20.1k total citations
58 papers, 1.1k citations indexed

About

Keiichi Asada is a scholar working on Astronomy and Astrophysics, Nuclear and High Energy Physics and Electrical and Electronic Engineering. According to data from OpenAlex, Keiichi Asada has authored 58 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 50 papers in Astronomy and Astrophysics, 46 papers in Nuclear and High Energy Physics and 6 papers in Electrical and Electronic Engineering. Recurrent topics in Keiichi Asada's work include Astrophysics and Cosmic Phenomena (45 papers), Astrophysical Phenomena and Observations (22 papers) and Radio Astronomy Observations and Technology (20 papers). Keiichi Asada is often cited by papers focused on Astrophysics and Cosmic Phenomena (45 papers), Astrophysical Phenomena and Observations (22 papers) and Radio Astronomy Observations and Technology (20 papers). Keiichi Asada collaborates with scholars based in Taiwan, Japan and United States. Keiichi Asada's co-authors include Masanori Nakamura, Hiroshi Nagai, Makoto Inoue, Akihiro Doi, Seiji Kameno, Hung-Yi Pu, Kazuhiro Hada, Motoki Kino, Kazunori Akiyama and Juan Carlos Algaba and has published in prestigious journals such as SHILAP Revista de lepidopterología, The Astrophysical Journal and Monthly Notices of the Royal Astronomical Society.

In The Last Decade

Keiichi Asada

53 papers receiving 1.0k citations

Peers

Keiichi Asada

NHEP

EEE

Tsunefumi Mizuno Japan

V. R. Chitnis India

M. Ackermann Germany

J. Niemiec Poland

J. W. den Herder Netherlands

Kajal K. Ghosh United States

E. Jourdain France

Shigenobu Hirose Japan

F. Schiavone Italy

D. J. K. Buisson United Kingdom

Tsunefumi Mizuno Japan

Keiichi Asada

770 ×0.8

706 ×0.8

NHEP

64 ×1.6

EEE

24 ×0.7

7 ×0.3

Citations per year, relative to Keiichi Asada Keiichi Asada (= 1×) peers Tsunefumi Mizuno

Countries citing papers authored by Keiichi Asada

Since Specialization

Citations

This map shows the geographic impact of Keiichi Asada's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Keiichi Asada with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Keiichi Asada more than expected).

Fields of papers citing papers by Keiichi Asada

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Keiichi Asada. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Keiichi Asada. The network helps show where Keiichi Asada may publish in the future.

Co-authorship network of co-authors of Keiichi Asada

This figure shows the co-authorship network connecting the top 25 collaborators of Keiichi Asada. A scholar is included among the top collaborators of Keiichi Asada based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Keiichi Asada. Keiichi Asada is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Hada, Kazuhiro, Keiichi Asada, Masanori Nakamura, & Motoki Kino. (2024). M 87: a cosmic laboratory for deciphering black hole accretion and jet formation. The Astronomy and Astrophysics Review. 32(1). 6 indexed citations

Lo, Wen-Ping, Keiichi Asada, Satoki Matsushita, et al.. (2023). Surveying Flux Density in Galaxies with Apparent Large Black Holes at Millimeter/Submillimeter Wavelengths. The Astrophysical Journal. 950(1). 10–10.

Park, Jongho, Motoki Kino, Hiroshi Nagai, et al.. (2023). Observational evidence to support a dense ambient medium shaping the jet in 3C 84. Astronomy and Astrophysics. 685. A115–A115. 7 indexed citations

Park, Jongho, Keiichi Asada, & Do‐Young Byun. (2023). Calibrating VLBI Polarization Data Using GPCAL. II. Time-dependent Calibration. The Astrophysical Journal. 958(1). 28–28. 2 indexed citations

Urata, Y., Kenji Toma, S. Covino, et al.. (2022). Simultaneous radio and optical polarimetry of GRB 191221B afterglow. Nature Astronomy. 7(1). 80–87. 6 indexed citations

Matsushita, Satoki, Pierre Martin-Cocher, Scott Paine, et al.. (2022). Five-year Monitoring of 225 GHz Opacity at Thule Air Base (Pituffik), Greenland. Publications of the Astronomical Society of the Pacific. 134(1042). 125002–125002.

Urata, Y., et al.. (2020). Two-component Jets of GRB 160623A as Shocked Jet Cocoon Afterglow. The Astrophysical Journal Letters. 891(1). L15–L15. 7 indexed citations

Doi, Akihiro, et al.. (2019). The Cygnus A Jet: Parabolic Streamlines up to Kiloparsec Scales. The Astrophysical Journal. 878(1). 61–61. 18 indexed citations

Doi, Akihiro, Yasuhiro Murata, Masanori Nakamura, et al.. (2019). The Two-sided Jet Structures of NGC 1052 at Scales from 300 to 4 × 10⁷ Schwarzschild Radii. The Astronomical Journal. 159(1). 14–14. 24 indexed citations

10.

Doi, Akihiro, et al.. (2018). Finding Transitions of Physical Condition in Jets from Observations over the Range of 10³–10⁹ Schwarzschild Radii in Radio Galaxy NGC 4261. The Astrophysical Journal. 854(2). 148–148. 29 indexed citations

11.

Akiyama, Kazunori, Keiichi Asada, Vincent L. Fish, et al.. (2018). The Global Jet Structure of the Archetypical Quasar 3C 273. Galaxies. 6(1). 15–15. 14 indexed citations

12.

Algaba, Juan Carlos, Masanori Nakamura, Keiichi Asada, & Sang-Sung Lee. (2017). RESOLVING THE GEOMETRY OF THE INNERMOST RELATIVISTIC JETS IN ACTIVE GALACTIC NUCLEI. The Astrophysical Journal. 834(1). 65–65. 25 indexed citations

13.

Nagai, Hiroshi, Kouichiro Nakanishi, R. Paladino, et al.. (2016). ALMA SCIENCE VERIFICATION DATA: MILLIMETER CONTINUUM POLARIMETRY OF THE BRIGHT RADIO QUASAR 3C 286. The Astrophysical Journal. 824(2). 132–132. 30 indexed citations

14.

Pu, Hung-Yi, Kazunori Akiyama, & Keiichi Asada. (2016). THE EFFECTS OF ACCRETION FLOW DYNAMICS ON THE BLACK HOLE SHADOW OF SAGITTARIUS A*. The Astrophysical Journal. 831(1). 4–4. 27 indexed citations

15.

Doi, Akihiro, et al.. (2016). Conical Stream of the Two-Sided Jets in NGC 4261 over the Range of 103–109 Schwarzschild Radii. Galaxies. 4(4). 80–80. 1 indexed citations

16.

Nagai, Hiroshi, G. Giovannini, Akihiro Doi, et al.. (2014). LIMB-BRIGHTENED JET OF 3C 84 REVEALED BY THE 43 GHz VERY-LONG-BASELINE-ARRAY OBSERVATION. The Astrophysical Journal. 785(1). 53–53. 61 indexed citations

17.

Doi, Akihiro, Yasuhiro Murata, Keiichi Asada, et al.. (2013). 広域吸収線クェーサーJ1020+4320の多周波VLBI観測: 最近再始動したジェット活動か. Publications of the Astronomical Society of Japan. 65(3). 1–57. 1 indexed citations

18.

Doi, Akihiro, et al.. (2012). KILOPARSEC-SCALE RADIO STRUCTURES IN NARROW-LINE SEYFERT 1 GALAXIES. Terrestrial Environment Research Center (University of Tsukuba). 52 indexed citations

19.

Asada, Keiichi & Makoto Inoue. (2004). A follow-up RM observation for helical magnetic field in 3C273. 65–68. 1 indexed citations

20.

Fujishima, Minoru, Keiichi Asada, Yasuhisa Ōmura, & K. Izumi. (1993). Low-Power 1/2 Frequency Dividers Using 0.1μm CMOS Circuits Built with Ultrathin SIMOX Substrates. IEICE Transactions on Electronics. 76(5). 850–852. 8 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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