資料8-JActivity Report of Commission JOctober 31, 2016 to March 30
March 30, 2017
Kenta Fujisawa (Yamaguchi University)

ALMA projectLatest scientific topics from ALMA press release (Mar 03, 2017)
An Extraordinary Celestial Spiral with a Twist
An international team of astronomers, led by Hyosun Kim in Academia Sinica Institute ofAstronomy and Astrophysics (ASIAA, Taiwan), has found a way of deriving the orbital
shape of binary stars that have orbital periods too long to be directly measured. This waspossible thanks to an observation toward the old star LL Pegasi (also known as AFGL3068) using the state-of-the-art telescope, the Atacama Large Millimeter/submillimeter
Array (ALMA).
The new ALMA images reveal the detailed features of spiral-shell pattern imprinted in thegas material continuously ejected from LL Pegasi. A comparison of this observation withcomputer simulations led the team, for the first time, to the conclusion that a highly
elliptical orbit is responsible for the morphology of gas distribution surrounding this binarysystem. In particular, the bifurcation of the spiral-shell pattern that is clearly visible in theALMA image, is a unique characteristic of elliptical binaries. This quintessential object
opens a new window on the nature of central binaries through the recurrent patterns thatreside far from the star at distances of a few thousand the stellar radii.

(The composite image of molecular gas around an old star LL Pegasi. Credit: ALMA
(ESO/NAOJ/NRAO), Hyosun Kim et al.)

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Activities of meetings


SKA Workshop “Galaxy Evolution and Distant Universe” 2017
Date: January 7 – 9, 2017
Venue: Arden Hotel Aso, Kumamoto, Japan
Topics: Cosmic Reionization, Cosmology, Galaxy Evolution, and Square Kilometre Array(SKA)

ALMA Band 1 Science Workshop
Date: 16-18 January 2017
Venue: ASIAA, Taipei (Taiwan)

The ALMA Band 1 Science Workshop will take place at the ASIAA (Academia Sinica, Institutefor Astronomy and Astrophysics) in Taipei (Taiwan) from January 16 to 18 2017. It will consist of afew invited talks on the main scientific goals of ALMA Band 1, plus contributed talks. We also plan
to have poster sessions. The ALMA Band 1 Science workshop will provide the first opportunity toshow the exciting new science ALMA Band 1 can deliver and to start preparing for the firstobserving proposals in the ALMA lowest frequency band. The two days after the workshop, 19-20
January, will be dedicated to the discussion and planning of the upcoming Band 1 ScienceVerification phase.
East-Asian ALMA Science Workshop 2016-Taiwan
Date: March 10-12, 2017
Venue: National Tsing Hua University, Hsinchu, Taiwan

In the past few cycles of ALMA scientific operations, we see great success from the EA
community in producing remarkable results. We are also excited by the expansion of the ALMA
community into Korea. To maintain the momentum and to promote regional collaboration, we holdregular science workshops in the three EA-ALMA countries. We are pleased to announce the 2016
East-Asian ALMA Science Workshop, to be held by National Tsing Hua University in Hsinchu,Taiwan, on March 10-12, 2017. Like the previous EA-ALMA Science Workshops, we invite ALMA
users to present their recent results. Furthermore, we would like to enhance the workshop functions
on promoting discussion and regional collaborations, by adjusting the workshop format. We will
split part of the workshop into two parallel sessions on Galactic and extragalactic studies. We will
have special sessions for prospective projects to call for collaborators, for archival science, andscience that require multi-wavelength observations. The workshop will be timely to develop
proposal ideas and form collaborations for the upcoming Cycle-5 deadline for PI programs. On theother hand, we encourage teams that plan to submit large proposals to hold meetings in advance, andpresent their ideas in the EA ALMA Science Workshop.

資料8-J

ALMA/45m/ASTE Users Meeting 2016
Date: December 19-20, 2016
Venue: NAOJ Mitaka, JapanThe users meeting is hosted by the Chile Observatory and Nobeyama Radio Observatory of theNational Astronomical Observatory of Japan (NAOJ).
Japan SKA consortium local meeting for “Development” in Kagoshima
Date: December 17, 2016
Venue: Inamori Hall, Kagoshima University, Kagoshima, Japan
Topics: Technical Development for Square Kilometre Array (SKA)

Japan Radio Science Forum Symposium 2016
Date: February 22 – 23, 2017
Venue: NAOJ, Mitaka, Japan
Topics: Dialogue between Senior and Young Scientists

Workshop: Black Hole Astrophysics with VLBI: Past, Present, and Future
Date: March 27 - 29, 2017
Venue: Mitaka campus of NAOJ, Tokyo, JapanThe workshop "Black Hole Astrophysics with VLBI: Past, Present, and Future", will be held inTokyo next March. We are organizing this workshop on the occasion of Professor Makoto Inoue'sretirement to honor and celebrate his leading and foundational contributions to the field. We aim toshare our fond memories of Professor Inoue's scientific career, and we also intend to encourage theyounger generation to succeed and exceed the future prospects in the advancing field of radio
astronomy. Anybody interested in the workshop is welcome.
ALMA Workshop for Proto-Planetary Disks
Date: January 27, 2017
Venue: Mitaka, NAOJ, Tokyo, Japan
Topics: ALMA proposal Cycle 5, Summary of current works

Workshop: 30m THz telescope in Antarctica
Date: March 2 – 3, 2017
Venue: The National Institute of Polar Research (NIPR), Tachikawa, Japan
Topics: THz astronomy, THz telescope資料8-JALMA Workshop “Nearby galaxy M83 2017”
Date: February 20 – 21, 2017
Venue: Mitaka, NAOJ, Japan
Topics: Observation of fine structure of M83, ISM evolution, Chemical evolution, Starformation

Workshop “Why does the Universe accelerate? -Exhaustive study and Challenge for thefuture”
Dates: 8 - 10 March 2017
Venue: Kobayashi Hall, KEK, Japan

Because gravity is an attractive force, the expansion speed of the Universe should be decreasing.
However, observational data accumulated over the years strongly support that the present Universe
is in the phase of the accelerated expansion and there was also another phase of the accelerated
expansion in the very early Universe. The physical mechanism that makes the Universe undergo theaccelerated expansion is not known yet. Some “repulsive force” is necessary. The purpose of thisinnovative area is to clarify the origin of the accelerated expansion. In order to achieve this goal, it isnecessary to investigate the interplay between the repulsive force causing the accelerated expansion
and the attractive force sourced by dark matter which triggers the formation of the cosmic structures
such as the galaxies and clusters of galaxies. In this innovative area, researchers from different fields
join together and form nine sub-groups: inflation in the early Universe (A01), decelerated expansion
by dark matter (A02), accelerated expansion by dark energy in the present Universe (A03), cosmic
microwave background (B01), galaxy imaging (B02), galaxy spectroscopy (B03), direct
measurement of the cosmic expansion (B04), ultimate data analysis (D01), and ultimate theory of theUniverse (C01). Not only collaborations within each individual sub-group but also collaborations
among the different sub-groups are essential to obtain scientific achievements we desire.
17th “Millimeter/Submillimeter Receiver Workshop” and 3rd “RIKEN and NICT Joint
THz Workshop”
Date: February 27 – 28, 2017
Venue: NICT, Koganei, Japana
Topics: Detection Devices, Optics, Antenna, HEMT, Cooling, Integration, Calibration andScience, Future Projects

ALMA Workshop for Solar System
Date: March 6, 2017
Venue: Mitaka, NAOJ, Japan
Topics: Millimeter and Submillimeter observation and Solar System

資料8-JALMA Workshop on Stars： At the Age of Full Band Availability
Date: March 24 – 25, 2017
Venue: Okayama University of Science, Okayama, Japan
Topics: Evolved Stars, Molecule/Dust, Full-band observation