資料6-JActivity Report of Commission JDecember 2014 to April 2015
April 10, 2015
Kenta Fujisawa (Yamaguchi University)

ALMA projectLatest scientific topics:Feb 26, 2015 ALMA Revealed Surprisingly Mild Environment around a Supermassive
Black HoleA research team led by Shuro Takano at the National Astronomical Observatory of Japan(NAOJ) and Taku Nakajima at Nagoya University observed the spiral galaxy M77, also
known as NGC1068, with the Atacama Large Millimeter/submillimeter Array (ALMA)
and discovered that organic molecules are concentrated in a region surrounding asupermassive black hole at its center. Although these molecules around a black hole arethought to be dissociated by strong X-rays and UV photons, the research results indicatethat some regions are shielded from X-rays and UV photons due to a large amount of dust
and gas. These results, which were made possible by the high sensitivity and wideband
observing capability of ALMA, will be a key to understanding the mysterious environment
around supermassive black holes.

Right is the central part of the galaxy M77,
also known as NGC1068, observed by
ALMA and the NASA/ESA Hubble SpaceTelescope. Yellow: cyanoacetylene (HC3N),
Red: carbon monosulfide (CS), Blue:carbon monoxide (CO), which are observedwith ALMA.
(Credit: ALMA (ESO/NAOJ/NRAO), S.
Takano et al., NASA/ESA Hubble Space
Telescope and A. van der Hoeven)

Activities of meetings
Radio Science Forum Symposium 2014 - Prospects for the radio astronomy of 2020 to2030 –Date: 27-28, December 2014
Venue: Conference Room, National Astronomical Observatory of Japan
The prospects for the radio astronomy of 2020 to 2030 is discussed in this symposium focusing
on the future large projects and developing scientific fields.

資料6-J

The 3rd workshop on Large Aperture mm/submm Telescopes in the ALMA era
Date: March 10 - 11, 2015
Venue: COSMOS Lodge, Conference Room, National Astronomical Observatory of Japan
http://www.ioa.s.u-tokyo.ac.jp/~ytamura/WS/LSTWS2015/
The main topic of this workshop is a large millimeter/sub-millimeter wave telescope in ALMAage. This telescope would have a large diameter single dish, having the wide view and a wide
wavelength coverage which is complementary with ALMA.
The main topics are; a review of outcomes by millimeter/sub-millimeter wave wide field survey
observation, future plans of large projects, scientific requirements for the next-generation
telescope and the observation system and detection technology, collaborating study with otherwavelengths and theoretical studies.

Workshop on our Galaxy 2015
Date: 23-24 March, 2015
Venue: University of Tokyo, Faculty of Science, No.1 Bldg. 1043
http://stella.astron.s.u-tokyo.ac.jp/mw2015/
Many studies have been made actively from theoretical and observational sides on the Milky
Way galaxy. Researchers of the various fields gather at this workshop and discuss on the current
state of the study about the Milky Way galaxy as a common target of the research.

ALMA workshop - the Mass Loss Mechanism and Dust Formation –Date: 26-27, March 2015
Venue: ISAS/JAXA Sagamihara Campus
Evolved stars and their envelope contain rich molecule and dust, and they are one of main
targets of radio astronomical observation. ALMA’s high sensitivity and high-angular resolution
let us study the fine structure and the small amount molecules of circumstellar envelope. Thiswould be used for a study of a mass-loss mechanism and a chemical evolution in the universe.
It's expected that proposals of many researcher will be accepted by the Cycle 3 of ALMA Callfor Proposals through this workshop. The results obtained by ALMA are reviewed and analyzed,
and directionality of stellar study using ALMA is discussed. Ideas of each observation plan arepresented and discussed, and the purpose of each study is clarified. Throughout this workshop,
each researcher can make a draft of observation plans in detail in this way. Main researchsubjects are dust formation in various circumstellar environments, acceleration mechanism ofstellar wind, the relation between the stellar evolution and the dust stellar wind.

資料6-JBusiness Meeting
General Meeting of Radio Astronomy Forum of Japan
Date 19 March, 2015
Venue: Osaka University
Topics:1. Activity report
2. Report on Radio Astronomy Forum Symposium 2014
3. Revision of the regulations
4. Others
NRO User’s Meeting
URSI activity
Radio Frequency Committee
SKAURSI Japan Commission J Meeting
Date 19 March, 2015
Venue: Osaka University
Topics:
1. Election of Chairman of Commission J
2. Others