Tomoharu Oka

3.0k total citations
69 papers, 1.9k citations indexed

About

Tomoharu Oka is a scholar working on Astronomy and Astrophysics, Nuclear and High Energy Physics and Spectroscopy. According to data from OpenAlex, Tomoharu Oka has authored 69 papers receiving a total of 1.9k indexed citations (citations by other indexed papers that have themselves been cited), including 65 papers in Astronomy and Astrophysics, 25 papers in Nuclear and High Energy Physics and 23 papers in Spectroscopy. Recurrent topics in Tomoharu Oka's work include Astrophysics and Star Formation Studies (51 papers), Astrophysics and Cosmic Phenomena (25 papers) and Astrophysical Phenomena and Observations (20 papers). Tomoharu Oka is often cited by papers focused on Astrophysics and Star Formation Studies (51 papers), Astrophysics and Cosmic Phenomena (25 papers) and Astrophysical Phenomena and Observations (20 papers). Tomoharu Oka collaborates with scholars based in Japan, United States and United Kingdom. Tomoharu Oka's co-authors include Tetsuo Hasegawa, Masahiko Hayashi, S. Sakamoto, Toshihiro Handa, Masato Tsuboi, Atsushi Miyazaki, Fumio Sato, J. M. MacLeod, N. W. Broten and L. W. Avery and has published in prestigious journals such as The Astrophysical Journal, Monthly Notices of the Royal Astronomical Society and The Astrophysical Journal Supplement Series.

In The Last Decade

Tomoharu Oka

64 papers receiving 1.8k citations

Peers

Countries citing papers authored by Tomoharu Oka

Since Specialization

Citations

This map shows the geographic impact of Tomoharu Oka'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 Tomoharu Oka with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Tomoharu Oka more than expected).

Fields of papers citing papers by Tomoharu Oka

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Tomoharu Oka. 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 Tomoharu Oka. The network helps show where Tomoharu Oka may publish in the future.

Co-authorship network of co-authors of Tomoharu Oka

This figure shows the co-authorship network connecting the top 25 collaborators of Tomoharu Oka. A scholar is included among the top collaborators of Tomoharu Oka 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 Tomoharu Oka. Tomoharu Oka 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

#	Work	Indexed citations
1	Millimeter-wave CO and SiO Observations toward the Broad-velocity-width Molecular Feature CO 16.134–0.553: A Smith Cloud Scenario? 2024 ·The Astrophysical Journal ·(unknown), Tomoharu Oka, (unknown), (unknown), (unknown)	0
2	Parabolic-like Trend in SiO Ratios throughout the Central Molecular Zone: Possible Signature of a Past Nuclear Activity in the Galactic Center 2024 ·The Astrophysical Journal Letters ·(unknown), Tomoharu Oka, (unknown), (unknown), Nanase Harada, (unknown), Rei Enokiya, (unknown)	1
3	Discovery of the Tadpole Molecular Cloud near the Galactic Nucleus 2023 ·The Astrophysical Journal ·(unknown), Tomoharu Oka, (unknown), Rei Enokiya, (unknown), (unknown), (unknown)	2
4	The Fifth Candidate for an Intermediate-mass Black Hole in the Galactic Center 2020 ·The Astrophysical Journal ·(unknown), Tomoharu Oka, (unknown), (unknown), (unknown)	20
5	Statistical Study of High-Velocity Compact Clouds Based on the Complete CO Imagings of the Central Molecular Zone 2016 ·Proceedings of the International Astronomical Union ·(unknown), Tomoharu Oka, (unknown), (unknown), (unknown), (unknown)	2
6	HIGH VELOCITY COMPACT CLOUDS IN THE SAGITTARIUS C REGION 2014 ·The Astrophysical Journal ·Kunihiko Tanaka, Tomoharu Oka, Shinji Matsumura, M. Nagai, Kazuhisa Kamegai	9
7	Flux monitoring observations of Sgr A* at 8 GHz and 2 GHz with the NICT Kashima–Koganei VLBI System 2013 ·Proceedings of the International Astronomical Union ·(unknown), Tomoharu Oka, Mamoru Sekido	0
8	A NEW LOOK AT THE GALACTIC CIRCUMNUCLEAR DISK 2011 ·The Astrophysical Journal ·Tomoharu Oka, M. Nagai, Kazuhisa Kamegai, Kunihiko Tanaka	37
9	A Chain of Dark Clouds in Projection Against the Galactic Center 2009 ·Publications of the Astronomical Society of Japan ·Takahiro Nagayama, Shuji Sato, Shogo Nishiyama, (unknown), Tetsuya Nagata, Hirofumi Hatano, Mikio Kurita, Yoichi Tamura, Yasushi Nakajima, Koji Sugitani, Tomoharu Oka, Yoshiaki Sofue	5
10	Physical and Chemical Properties of Massive Clumps in the AFGL 333 Cloud 2007 ·The Astrophysical Journal ·Takeshi Sakai, Tomoharu Oka, Satoshi Yamamoto	5
11	A CO J = 3–2 Survey of the Galactic Center 2007 ·Publications of the Astronomical Society of Japan ·Tomoharu Oka, M. Nagai, (unknown), Kunihiko Tanaka, (unknown)	44
12	Physical Conditions of Molecular Gas in the Galactic Center 2007 ·Publications of the Astronomical Society of Japan ·M. Nagai, Kunihiko Tanaka, Kazuhisa Kamegai, Tomoharu Oka	21
13	High-Resolution Mappings of the $l=1{\rlap{.}{^\circ}}3$ Complex in Molecular Lines: Discovery of a Proto-Superbubble 2007 ·Publications of the Astronomical Society of Japan ·Kunihiko Tanaka, Kazuhisa Kamegai, M. Nagai, Tomoharu Oka	26
14	Atomic Carbon in the Southern Milky Way 2005 ·The Astrophysical Journal ·Tomoharu Oka, Kazuhisa Kamegai, M. Hayashida, M. Nagai, Masafumi Ikeda, (unknown), Kunihiko Tanaka, L. Bronfman, Satoshi Yamamoto	11
15	A Hyperenergetic CO Shell in the Galactic Center Molecular Cloud Complex 2001 ·Publications of the Astronomical Society of Japan ·Tomoharu Oka, Tetsuo Hasegawa, Fumio Sato, Masato Tsuboi, Atsushi Miyazaki	19
16	A Molecular Cloud and an Expanding Cavity Adjacent to the Nonthermal Filaments of the Galactic Center Radio Arc 2001 ·Publications of the Astronomical Society of Japan ·Tomoharu Oka, Tetsuo Hasegawa, Fumio Sato, Masato Tsuboi, Atsushi Miyazaki	17
17	The Eagle Nebula's fingers - pointers to the earliest stages of star formation? 1999 ·Open Research Online (The Open University) ·G. J. White, Richard P. Nelson, W. S. Holland, E. I. Robson, J. S. Greaves, M. J. McCaughrean, G. L. Pilbratt, Dana S. Balser, Tomoharu Oka, S. Sakamoto, Tetsuo Hasegawa, W. H. McCutcheon, H. E. Matthews, (unknown), N. F. H. Tothill, M. Huldtgren, (unknown)	3
18	ASTROS-A TELESCOPE CONTROL SYSTEM FOR A SMALL RADIO TELESCOPE 1996 ·Journal of The Korean Astronomical Society ·Toshihiro Handa, Takashi Hasegawa, Jun‐Ichi Morino, Tomoharu Oka, K. Sato, Kazuo Sorai, Marta Della Seta, Masahiko Hayashi, S. Sakamoto	1
19	The detection of cyanohexatriyne in Heiles's cloud 2. 1978 ·The Astrophysical Journal ·Harold W. Kroto, C. Kirby, D. R. M. Walton, L. W. Avery, N. W. Broten, J. M. MacLeod, Tomoharu Oka	127
20	The detection of HC9N in interstellar space 1978 ·The Astrophysical Journal ·N. W. Broten, Tomoharu Oka, L. W. Avery, J. M. MacLeod, Harold W. Kroto	175

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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