Tomoharu Oka

2022

Catalog of High-velocity Dispersion Compact Clouds in the Central Molecular Zone of Our Galaxy

Oka, T., Uruno, A., Enokiya, R., Nakamura, T., Yamasaki, Y., Watanabe, Y., Tokuyama, S. & Iwata, Y., 2022 8月 1, In: Astrophysical Journal, Supplement Series. 261, 2, 13.

研究成果: Article › 査読

Open Access

2021

Broad-velocity-width Molecular Features in the Galactic Plane

Yokozuka, H., Oka, T., Takekawa, S., Iwata, Y. & Tsujimoto, S., 2021 2月 20, In: Astrophysical Journal. 908, 2, 246.

研究成果: Article › 査読

Open Access

1 被引用数 (Scopus)

New Look at the Molecular Superbubble Candidate in the Galactic Center

Tsujimoto, S., Oka, T., Takekawa, S., Iwata, Y., Uruno, A., Yokozuka, H., Nakagawara, R., Watanabe, Y., Kawakami, A., Nishiyama, S., Kaneko, M., Kanno, S. & Ogawa, T., 2021 3月 20, In: Astrophysical Journal. 910, 1, 61.

研究成果: Article › 査読

Open Access

5 被引用数 (Scopus)

2020

The Fifth Candidate for an Intermediate-mass Black Hole in the Galactic Center

Takekawa, S., Oka, T., Iwata, Y., Tsujimoto, S. & Nomura, M., 2020 2月 20, In: Astrophysical Journal. 890, 2, 167.

研究成果: Article › 査読

Open Access

14 被引用数 (Scopus)

Time Variations in the Flux Density of Sgr A∗ at 230 GHz Detected with ALMA

Iwata, Y., Oka, T., Tsuboi, M., Miyoshi, M. & Takekawa, S., 2020 4月 1, In: Astrophysical Journal Letters. 892, 2, L30.

研究成果: Article › 査読

Open Access

13 被引用数 (Scopus)

2019

An energetic high-velocity compact cloud: CO-0.31+0.11

Takekawa, S., Oka, T., Tokuyama, S., Tanabe, K., Iwata, Y., Tsujimoto, S., Nomura, M. & Shibuya, Y., 2019 12月 1, In: Publications of the Astronomical Society of Japan. 71, S21.

研究成果: Article › 査読

6 被引用数 (Scopus)

High-resolution CO images of the Galactic central molecular zone

Tokuyama, S., Oka, T., Takekawa, S., Iwata, Y., Tsujimoto, S., Yamada, M., Furusawa, M. & Nomura, M., 2019 12月 1, In: Publications of the Astronomical Society of Japan. 71, S19.

研究成果: Article › 査読

9 被引用数 (Scopus)

Indication of Another Intermediate-mass Black Hole in the Galactic Center

Takekawa, S., Oka, T., Iwata, Y., Tsujimoto, S. & Nomura, M., 2019 1月 20, In: Astrophysical Journal Letters. 871, 1, L1.

研究成果: Article › 査読

Open Access

19 被引用数 (Scopus)

2018

Detection of Another Molecular Bubble in the Galactic Center

Tsujimoto, S., Oka, T., Takekawa, S., Yamada, M., Tokuyama, S., Iwata, Y. & Roll, J. A., 2018 4月 1, In: Astrophysical Journal. 856, 2, 91.

研究成果: Article › 査読

6 被引用数 (Scopus)

Magnetohydrodynamic Simulations of a Plunging Black Hole into a Molecular Cloud

Nomura, M., Oka, T., Yamada, M., Takekawa, S., Ohsuga, K., Takahashi, H. R. & Asahina, Y., 2018 5月 20, In: Astrophysical Journal. 859, 1, 29.

研究成果: Article › 査読

5 被引用数 (Scopus)

2017

Discovery of Two Small High-velocity Compact Clouds in the Central 10 pc of Our Galaxy

Takekawa, S., Oka, T., Iwata, Y., Tokuyama, S. & Nomura, M., 2017 7月 1, In: Astrophysical Journal Letters. 843, 1, L11.

研究成果: Article › 査読

15 被引用数 (Scopus)

Distance to the Low-velocity Cloud in the Direction of the High-velocity Compact Cloud CO-0.40-0.22

Iwata, Y., Kato, H., Sakai, D. & Oka, T., 2017 5月 1, In: Astrophysical Journal. 840, 1, 18.

研究成果: Article › 査読

3 被引用数 (Scopus)

KINEMATICS of ULTRA-HIGH-VELOCITY GAS in the EXPANDING MOLECULAR SHELL ADJACENT to the W44 SUPERNOVA REMNANT

Yamada, M., Oka, T., Takekawa, S., Iwata, Y., Tsujimoto, S., Tokuyama, S., Furusawa, M., Tanabe, K. & Nomura, M., 2017 1月 1, In: Astrophysical Journal Letters. 834, 1, L3.

研究成果: Article › 査読

10 被引用数 (Scopus)

Millimetre-wave emission from an intermediate-mass black hole candidate in the Milky Way

Oka, T., Tsujimoto, S., Iwata, Y., Nomura, M. & Takekawa, S., 2017 7月 1, In: Nature Astronomy. 1, 10, p. 709-712 4 p.

研究成果: Article › 査読

37 被引用数 (Scopus)

PHYSICAL CONTACT between the +20 km s^-1 CLOUD and the GALACTIC CIRCUMNUCLEAR DISK

Takekawa, S., Oka, T. & Tanaka, K., 2017 1月 10, In: Astrophysical Journal. 834, 2, 121.

研究成果: Article › 査読

13 被引用数 (Scopus)

2016

Caravan-Submm, Black Hole Imager in the Andes

Miyoshi, M., Kasuga, T., Iba, J. K. I., Oka, T., Sekido, M., Takefuji, K., Takahashi, M., Saida, H. & Takahashi, R., 2016, In: Advances in Astronomy. 2016, 8306494.

研究成果: Article › 査読

Open Access

Kinematics of the Ultra-High-Velocity Gas in the Expanding Molecular Shell Adjacent to the W44 Supernova Remnant

Yamada, M., Oka, T., Tanaka, K., Nomura, M., Takekawa, S., Iwata, Y., Tokuyama, S., Tanabe, K., Tsujimoto, S. & Furusawa, M., 2016, In: Proceedings of the International Astronomical Union. 11, p. 151-153 3 p.

研究成果: Article › 査読

Physical contact between the +20 km s^-1 cloud and the galactic circumnuclear disk

Takekawa, S., Oka, T. & Tanaka, K., 2016, In: Proceedings of the International Astronomical Union. 11, p. 145-146 2 p.

研究成果: Article › 査読

Possible Detection of Quasi-Periodic Oscillations from Sgr A∗ at 43 GHz

Iwata, Y., Oka, T. & Miyoshi, M., 2016, In: Proceedings of the International Astronomical Union. 11, p. 50-51 2 p.

研究成果: Article › 査読

Signature of an intermediate-mass black hole in the central molecular zone of our galaxy

Oka, T., Mizuno, R., Miura, K. & Takekawa, S., 2016, In: Proceedings of the International Astronomical Union. 11, p. 119-122 4 p.

研究成果: Article › 査読

SIGNATURE of AN INTERMEDIATE-MASS BLACK HOLE in the CENTRAL MOLECULAR ZONE of OUR GALAXY

Oka, T., Mizuno, R., Miura, K. & Takekawa, S., 2016 1月 1, In: Astrophysical Journal Letters. 816, 1, L7.

研究成果: Article › 査読

38 被引用数 (Scopus)

Statistical study of high-velocity compact clouds based on the complete co imagings of the central molecular zone

Tokuyama, S., Oka, T., Takekawa, S., Yamada, M., Iwata, Y. & Tsujimoto, S., 2016, In: Proceedings of the International Astronomical Union. 11, p. 154-155 2 p.

研究成果: Article › 査読

1 被引用数 (Scopus)

2015

CO-0.30-0.07: A PECULIAR MOLECULAR CLUMP with AN EXTREMELY BROAD VELOCITY WIDTH in the CENTRAL MOLECULAR ZONE of the MILKY WAY

Tanaka, K., Nagai, M., Kamegai, K. & Oka, T., 2015 6月 10, In: Astrophysical Journal. 806, 1, 130.

研究成果: Article › 査読

7 被引用数 (Scopus)

2014

3 mm band line survey toward the high-velocity compact cloud CO-0.40-0.22

Oka, T., Tanaka, K., Matsumura, S., Miura, K., Takekawa, S., Takahata, Y. & Nishino, A., 2014 5月, In: Proceedings of the International Astronomical Union. 9, S303, p. 202-204 3 p.

研究成果: Article › 査読

Daily monitor of Sagittarius A* at 22 GHz with the Japanese VLBI Network

Tsuboi, M., Asaki, Y., Yonekura, Y., Miyamoto, Y., Kaneko, H., Seta, M., Nakai, N., Kameya, O., Miyoshi, M., Takaba, H., Wakamatsu, K., Fukuzaki, Y., Morimitsu, T., Uehara, K., Sekido, M., Oka, T., Takekawa, S., Omodaka, T., Handa, T. & Takumi, A., 2014 5月, In: Proceedings of the International Astronomical Union. 9, S303, p. 382-384 3 p.

研究成果: Article › 査読

Flux monitoring observations of Sgr A* at 8 GHz and 2 GHz with the NICT Kashima-Koganei VLBI system

Takekawa, S., Oka, T. & Sekido, M., 2014 5月, In: Proceedings of the International Astronomical Union. 9, S303, p. 330-332 3 p.

研究成果: Article › 査読

High velocity compact clouds in the sagittarius C region

Tanaka, K., Oka, T., Matsumura, S., Nagai, M. & Kamegai, K., 2014 3月 1, In: Astrophysical Journal. 783, 1, 62.

研究成果: Article › 査読

13 被引用数 (Scopus)

Millimeter-wave molecular line observations of the tornado nebula

Sakai, D., Oka, T., Tanaka, K., Matsumura, S., Miura, K. & Takekawa, S., 2014 8月 10, In: Astrophysical Journal. 791, 1, 49.

研究成果: Article › 査読

3 被引用数 (Scopus)

Millimeter-wave spectral line surveys toward the galactic circumnuclear disk and Sgr A

Takekawa, S., Oka, T., Tanaka, K., Matsumura, S., Miura, K. & Sakai, D., 2014 9月 1, In: Astrophysical Journal, Supplement Series. 214, 1, 2.

研究成果: Article › 査読

9 被引用数 (Scopus)

2013

Kinematics of shocked molecular gas adjacent to the supernova remnant W44

Sashida, T., Oka, T., Tanaka, K., Aono, K., Matsumura, S., Nagai, M. & Seta, M., 2013 9月 1, In: Astrophysical Journal. 774, 1, 10.

研究成果: Article › 査読

Open Access

27 被引用数 (Scopus)

2012

Discovery of the pigtail molecular cloud in the galactic center

Matsumura, S., Oka, T., Tanaka, K., Nagai, M., Kamegai, K. & Hasegawa, T., 2012 9月 1, In: Astrophysical Journal. 756, 1, 87.

研究成果: Article › 査読

5 被引用数 (Scopus)

2011

A new look at the galactic circumnuclear disk

Oka, T., Nagai, M., Kamegai, K. & Tanaka, K., 2011 5月 10, In: Astrophysical Journal. 732, 2, 120.

研究成果: Article › 査読

48 被引用数 (Scopus)

High atomic carbon abundance in molecular clouds in the Galactic center region

Tanaka, K., Oka, T., Matsumura, S., Nagai, M. & Kamegai, K., 2011 12月 20, In: Astrophysical Journal Letters. 743, 2, L39.

研究成果: Article › 査読

23 被引用数 (Scopus)

Suzaku discovery of twin thermal plasma from the Tornado nebula

Sawada, M., Go Tsuru, T., Koyama, K. & Oka, T., 2011 11月 25, In: Publications of the Astronomical Society of Japan. 63, SPEC. ISSUE 3, p. S849-S855

研究成果: Article › 査読

Open Access

4 被引用数 (Scopus)

Wild at Heart: The particle astrophysics of the Galactic Centre

Crocker, R. M., Jones, D. I., Aharonian, F., Law, C. J., Melia, F., Oka, T. & Ott, J., 2011 5月, In: Monthly Notices of the Royal Astronomical Society. 413, 2, p. 763-788 26 p.

研究成果: Article › 査読

107 被引用数 (Scopus)

2009

A chain of dark clouds in projection against the galactic center

Nagayama, T., Sato, S., Nishiyama, S., Murai, Y., Nagata, T., Hatano, H., Kurita, M., Tamura, M., Nakajima, Y., Sugitani, K., Oka, T. & Sofue, Y., 2009 4月 25, In: Publications of the Astronomical Society of Japan. 61, 2, p. 283-290 8 p.

研究成果: Article › 査読

Open Access

3 被引用数 (Scopus)

Large expanding molecular arc in the Sagittarius Bl complex

Tanaka, K., Oka, T., Nagai, M. & Kamegai, K., 2009, In: Publications of the Astronomical Society of Japan. 61, 3, p. 461-469 9 p.

研究成果: Article › 査読

Open Access

16 被引用数 (Scopus)

2008

Aperture synthesis imaging of a high-velocity compact cloud near the galactic center

Oka, T., Hasegawa, T., White, G. J., Sato, F., Tsuboi, M. & Miyazaki, A., 2008, In: Publications of the Astronomical Society of Japan. 60, 3, p. 429-434 6 p.

研究成果: Article › 査読

Open Access

21 被引用数 (Scopus)

2007

A CO J = 3-2 survey of the galactic center

Oka, T., Nagai, M., Kamegai, K., Tanaka, K. & Kuboi, N., 2007, In: Publications of the Astronomical Society of Japan. 59, 1, p. 15-23 9 p.

研究成果: Article › 査読

Open Access

64 被引用数 (Scopus)

High-resolution mappings of the l =1.3 complex in molecular lines: Discovery of a proto-superbubble

Tanaka, K., Kamegai, K., Nagai, M. & Oka, T., 2007, In: Publications of the Astronomical Society of Japan. 59, 2, p. 323-333 11 p.

研究成果: Article › 査読

Open Access

34 被引用数 (Scopus)

Physical and chemical properties of massive clumps in the AFGL 333 cloud

Sakai, T., Oka, T. & Yamamoto, S., 2007 6月 20, In: Astrophysical Journal. 662, 2 I, p. 1043-1051 9 p.

研究成果: Article › 査読

7 被引用数 (Scopus)

Physical conditions of molecular gas in the galactic center

Nagai, M., Tanaka, K., Kamegai, K. & Oka, T., 2007, In: Publications of the Astronomical Society of Japan. 59, 1, p. 25-31 7 p.

研究成果: Article › 査読

Open Access

30 被引用数 (Scopus)

2006

A large-scale CO J=3-2 survey of the galactic center

Oka, T., Nagai, M., Kamegai, K. & Tanaka, K., 2006 12月 1, In: Journal of Physics: Conference Series. 54, 1, p. 67-71 5 p., 012.

研究成果: Article › 査読

1 被引用数 (Scopus)

Atomic carbon in the AFGL 333 cloud

Sakai, T., Tomoharu, O. K. A. & Yamamoto, S., 2006 9月 20, In: Astrophysical Journal. 649, 1 I, p. 268-279 12 p.

研究成果: Article › 査読

15 被引用数 (Scopus)

Physical and chemical properties of the AFGL 333 cloud

Sakai, T., Oka, T. & Yamamoto, S., 2006 8月, In: Proceedings of the International Astronomical Union. 2, S237, p. 471 1 p.

研究成果: Article › 査読

2005

Atomic carbon in the southern milky way

Oka, T., Kamegai, K., Hayashida, M., Nagai, M., Ikeda, M., Kuboi, N., Tanaka, K., Bronfman, L. & Yamamoto, S., 2005 4月 20, In: Astrophysical Journal. 623, 2 I, p. 889-896 8 p.

研究成果: Article › 査読

21 被引用数 (Scopus)

2004

Detection of shocked molecular gas by full-extent mapping of the supernova remnant W44

Seta, M., Hasegawa, T., Sakamoto, S., Oka, T., Sawada, T., Inutsuka, S. I., Koyama, H. & Hayashi, M., 2004 2月, In: Astronomical Journal. 127, 2 1778, p. 1098-1116 19 p.

研究成果: Article › 査読

47 被引用数 (Scopus)

Observational approach to molecular cloud evolution

Oka, T. & Yamamoto, S., 2004 1月 1, In: Advances in Space Research. 34, 3, p. 519-523 5 p.

研究成果: Article › 査読

Submillimeter-wave C I spectral lines from the NGC 1333 region

Oka, T., Iwata, M., Maezawa, H., Ikeda, M., Ito, T., Kamegai, K., Sakai, T. & Yamamoto, S., 2004 2月 20, In: Astrophysical Journal. 602, 2 I, p. 803-815 13 p.

研究成果: Article › 査読

9 被引用数 (Scopus)

2003

Distribution of the [C I] emission in the ρ Ophiuchi dark cloud

Kamegai, K., Ikeda, M., Maezawa, H., Ito, T., Iwata, M., Sakai, T., Oka, T., Yamamoto, S., Sekimoto, Y., Tatematsu, K., Noguchi, T., Saito, S., Fujiwara, H., Ozeki, H., Inatani, J. & Ohishi, M., 2003 5月 20, In: Astrophysical Journal. 589, 1 I, p. 378-385 8 p.

研究成果: Article › 査読

27 被引用数 (Scopus)

岡 朋治

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岡朋治