資料8-J

Activity Report of Commission J
August 2014 to December 2014
December 24, 2014
Kenta Fujisawa (Yamaguchi University)

ALMA projectLatest scientific topics:
November 5, 2014 Revolutionary ALMA Image Reveals Planetary Genesis
A new image from ALMA, the Atacama Large Millimeter/submillimeter Array,reveals extraordinarily fine detail that has never been seen before in the planet-forming
disc around a young star. ALMA’s new high-resolution capabilities were achieved byspacing the antennas up to 15 kilometers apart. This new result represents an enormous
step forward in the understanding of howprotoplanetary discs develop and how planets
form.
ALMA has obtained its mostdetailed image yet showing the structure of
the disc around HL Tau, a million-year-oldSun-like star located approximately 450
light-years from Earth in the constellation ofTaurus. The image exceeds all expectations
and reveals a series of concentric and brightrings, separated by gaps (from ALMAwebsite).

Activities of meetings
Workshop on the formation of high-mass stars: from the Galaxy to the nearby galaxies inthe ALMA era
Date: 18-19 September, 2014
Place: Ibaraki University
High-mass star forming region is the place which forms the matter and structure of our galaxy.
However studies on this regions have been limited relative to that of low and mid-mass starformation due to the low resolution of present observation systems. It is important tounderstand the high-mass star formation to understand the star formation in nearby galaxies.
However the discussion on the connection between the star formation in the Galaxy and nearby
galaxies has been missed. Now it became possible to observe such regions at high resolution
using ALMA in recent years. The combination with VLBI observations will let us discuss thedynamics of gas in the circumference of young stars in detail. The high-mass star formation

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region in relatively distant place could be observed now at high resolution. And the connecting
study of high-mass star formation in our Galaxy and nearby galaxy became possible.
Since a workshop "high-mass star formation and ALMA" held in 2009, high-mass starformation has not been considered actively in Japan. We would like to grasp the status of recent
study of high-mass star formation and star formation in nearby galaxy by this workshop andalso pay attention to the ALMA data which becomes open in particular.
JCMT Science workshop
Date: 1-2 September, 2014
Place: National Astronomical Observatory of Japan
James Clerk Maxwell Telescope (JCMT) is a sub-millimeter wave telescope of 15 meter
diameter. It has made observations on the top of MAUNAKEA in Hawaii since 1987. JCMT
has been managed by UK and Canada up to now, but it is decided to suspend practical use inSeptember, 2014. After that the telescope will be gifted to Hawaii University. JCMT is an
excellent equipment, so Hawaii University would like to continue using JCMT. The East Asia
core observatory association (EACOA) by which Japan, China, Korea and Taiwan cooperated isgoing to take practical use of JCMT. We would like to discuss what kind of study to do using
JCMT at this workshop.

Mizusawa VLBI Observatory User’s Meeting
Date: 24-15 September, 2014
Place: National Astronomical Observatory of JapanVERA project is promoted by Mizusawa VLBI observatory. Maser sources are observed byVERA with phase-referencing technique to determine the precise location so that to makethree-dimensional map of the Galaxy and to study the Galactic dynamics. Common use of
combined VLBI observation network KaVA of Japan and the Korea has started from year 2013.
A users meeting is held for the purpose of getting maximum excellent results in VERA. We
would like to discuss the current state of the observation system, the former observation
outcome and the present problem. We also welcome the proposal and discussions on the futureof VLBI astronomy.

Japan SKA science conference 2014 “Cosmic Magnetic Field”
Date: 13-14 November, 2014
Place: National Astronomical Observatory of Japan
Preparations of Square Kilometre Array (SKA) which is the only international large project atmeter-wave and centimeter-wave is getting into full swing increasingly. It is expected by thisequipment that origin and evolution of magnetic fields in the Sun, interstellar matter, galaxy,cluster of galaxies and cosmology. So in this workshop, we would like to call researchers who
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various study fields, we aim to overlook the future magnetic field study. Possibilities of joint
research and equipment development will be considered by discussions from various viewpointon SKA.
ALMA workshop for high-z and nearby galaxies
Date: 20-21 October, 2014
Place: National Astronomical Observatory of Japan
About 3 years have passed after scientific observation of ALMA was begun. Data release ofCycle 2 also started, and it is expected from now on that results come out one after another. Itwas becoming clear that at the millimeter/sub-millimeter wave which are observation bands in
ALMA, and at other observing bands, high resolution data of distribution and velocity structureof stars, gas and dust of nearby galaxy has been available. Moreover one can see the internal
structure of distant galaxies. However, understanding on relation with the distribution of form
evolution, chemical evolution and star formation, or physical interpretation of these objects arestill poor. The next call for proposal (Cycle 3) of ALMA is scheduled for spring in 2015. Basedon the situation of Cycle 0-2, at this workshop, the strategy pointed on and after Cycle 3 isdiscussed.

Workshop on Interstellar Matter 2014
Date: 16-18 October, 2014
Place: Hokkaido University
The universe has provided many new problems to the wide field of the science as "laboratory"of the extreme environment. Chemical and physical viewpoints are now recognized to benecessary for study of universe. This workshop is planned for researchers, graduate students
and students who have the interest in space chemistry and materials by the wide meaning as achance to share the respective study results and problem consciousness. We would like to focus
on the development of experimental and theoretical studies on the material level and an atomic
molecular level, and look for the connection with present’s or the future exploration of universe
in particular. Participants of wide fields of astronomy, planetary science, chemistry and physics
are welcomed.

NAOJ will hold 2014 ALMA/ASTE/Mopra Users Meeting.
Date: October, 27 - 29, 2014
Location: National Astronomical Observatory of Japan
In this meeting, we will have presentations and discussions of latest ALMA/ASTE/Mopra
results.

We will introduce the current and anticipated status of ALMA, the observation

procedure, data analysis / reduction processes, and next proposals (Cycle 3 and beyond), andalso discuss the operations of ASTE/Mopra. We will also have a tutorial session to learn about
the usage of CASA with real ALMA data.

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15th Workshop on Submillimeter-Wave Receiver Technologies in Eastern Asia
Date: 15-18 December, 2014
Place: AQUAVILLA ISE-SHIMAThe object of this workshop to discuss the new topics on the technology of high-sensitivity
receivers such as heterodyne receiver for millimeter-tera Hertz region, superconductive photondetector, low-noise amplifier, oscillator and refrigeration machine.
So far, many of receiver related technology discussed in this workshop have been installed into
various telescopes, and a lot of observation outcomes were being obtained. For example theband 10 receiver of ALMA was developed under collaboration of Japan China and Taiwan.
Recently, the observing frequency is reaching to tera Hertz region with the aid of developmentof a device fabrication method and development of new material.
Radio astronomers in East Asia and South Asia of various countries participate in this year'sworkshop. We would like to strengthen the international competitiveness of Asia by this and tospread a basic technology. The next new topics are also treated.
(1) THz detector (SIS, HEB and superconductive photon detector/camera)(2) THz local oscillator(3) Super-low noise IF amplifier(4) Possibility of the multibeam receiver(5) Possibility of the (multi-) octave receiver(6) The current state and the future of large scale and high-speed spectrometer(7) ALMA joint session (the current state, the future and receiver future plan)(8) Radio astronomy in Asian countries, the current state of the related technical development
and the future
We will have two special sessions. Several timely invitation lectures related to a next generation
receiver are also scheduled.