深宇宙追跡技術グループ

研究キーワード

電波天文学 ,Radio Astronomy

研究分野

自然科学一般 / 天文学 /

経歴

1991年

-

1992年

学術振興会特別研究員

1991年

-

1992年

Researcher in Japan Society for the Promotion of Science

1992年

- 文部省宇宙科学研究所助手

1992年

- The Institute of Space and Astronautical Science

学歴

-

1991年

東京大学理学系研究科天文学

-

1991年

東京大学

-

1986年

東京大学理学部天文学

-

1986年

東京大学

論文

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The core shift measurements for two-sided jets affected by Free-Free absorption using VLBA

Takafumi Haga Akihiro Doi Yasuhiro Murata Hiroshi Sudou Seiji Kameno Kazuhiro Hada Hiroshi Nagai

INNERMOST REGIONS OF RELATIVISTIC JETS AND THEIR MAGNETIC FIELDS 61 2013年 [査読有り]

A radio core represents the peak of intensity in VLBI images and is located at the base of jets. It appears at different positions depending on frequencies. This is known as "core shift", caused by absorption of the core emission. The position of ...

The VLBI Imaging Survey of the 6.7 GHz Methanol Masers using the JVN/EAVN

K. Sugiyama K. Fujisawa K. Hachisuka Y. Yonekura K. Motogi M. Honma T. Hirota S. Sawada-Satoh K. Niinuma Y. Murata A. Doi H. Ogawa Z. -Q. Shen

NEW TRENDS IN RADIO ASTRONOMY IN THE ALMA ERA: THE 30TH ANNIVERSARY OF NOBEYAMA RADIO OBSERVATORY 476 347-348 2013年 [査読有り]

We present a result of the VLBI (very-long-baseline-interferometer) imaging survey for the 6.7 GHz methanol masers by using the Japanese VLBI Network (JVN) and the East-Asian VLBI Network (EAVN). We conducted VLBI observations for 36 methanol mase...

The VLBI mapping survey of the 6.7 GHz methanol masers with the JVN/EAVN

K. Fujisawa K. Hachisuka K. Sugiyama A. Doi M. Honma Y. Yonekura T. Hirota S. Sawada-Satoh Y. Murata K. Motogi H. Ogawa X. Chen K. T. Kim Z. Q. Shen

Proceedings of the International Astronomical Union 8(287) 288-289 2012年7月 [査読有り]

We present VLBI maps of the 6.7 GHz methanol maser emission in 32 sources obtained using the Japanese VLBI Network (JVN) and the East-Asian VLBI Network (EAVN). All of the observed sources provide new VLBI maps, and the spatial morphologies have b...

Internal Proper Motions of Methanol Masers at 6.7 GHz in Massive Star-Forming Region Onsala 1

Koichiro Sugiyama Kenta Fujisawa Akihiro Doi Mareki Honma Yasuko Isono Hideyuki Kobayashi Nanako Mochizuki Yasuhiro Murata Satoko Sawada-Satoh Kiyoaki Wajima

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 63(1) 53-61 2011年2月

We present the internal proper motions of 6.7 GHz methanol masers in a massive star-forming region, Onsala 1 (ON 1), measured using the Japanese very long baseline interferometry network (JVN) at three epochs spanning 778 days. The methanol masers...

Advanced Space Technologies in Space Science Missions - Space VLBI Mission ASTRO-G Project as an Example -

SAITO Hirobumi SAKAI Shin-ichiro HIGUCHI Ken KISHIMOTO Naoko TAKEUCHI Hiroshi YOSHIHARA Keisuke ASAKI Yoshiharu TSUBOI Masato MURATA Yasuhiro KOBAYASHI Hideyuki

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN 8(27) To_4_33-To_4_41 2010年 [査読有り]

Space VLBI (very long baseline interferometry) mission, ASTRO-G, will be launched in 2013 by Japan Aerospace Exploration Agency (JAXA). ASTRO-G is a follow-on mission of HALCA (VSOP) mission in 1990s, which was the world first space VLBI mission. ...