資料5-JActivity Report of Commission JApril 2015 to July 2015
July 28, 2015
Kenta Fujisawa (Yamaguchi University)

ALMA projectLatest scientific topics from ALMA press release:Jun 09, 2015 ALMA uses 'Natural Telescope' to Image Monstrous Galaxy near the Edge ofthe Universe

For centuries cartographers were fond of depicting monsters along the edges of their maps.
Now, researchers have depicted a monstrous galaxy near the edge of the charted Universe
with unprecedented detail using the Atacama Large Millimeter/submillimeter Array(ALMA) with the assistance of a 'natural telescope' known as a gravitational lens. The
team modeled the lensing effects and corrected for them to reveal the distribution of hugestellar cradles in the monstrous galaxy. As a bonus, the same model indicates, for the firsttime, the existence of a supermassive black hole at the center of the foreground galaxy.

The figure below shows ALMA image of SDP.81 overlaid on a near-infrared image takenby the NASA/ESA Hubble Space Telescope. The inset shows a close up of the ALMA
image (left) and the simulation produced by the model (right). The reader can see that themodel accurately reproduces the observed Einstein ring.
(This press release was issued
by The University of Tokyo on
June 9th, 2015 in Japanese.
English version is translated bytheNational

AstronomicalObservatory of Japan.)Credit:Y.

Tamura(TheUniversity of Tokyo)/ALMA(ESO/NAOJ/NRAO)

Activities of meetings
ALMA Cycle3 Town Meeting in Mitaka Second circularDate: April 8thVenue: Conference Room, National Astronomical Observatory of JapanWe are happy to announce that Atacama Large Millimeter submillimeter Array (ALMA) call for
proposal for Cycle 3 has been released. The deadline is scheduled for 23rd of April, 15:00UT,資料5-J

2015. ALMA proposals are prepared and submitted by using unique software, ALMA
Observing Tool (OT). To encourage users in East Asia to make use of the ALMA facility, we,East Asian ALMA Regional Center (EA ARC), would like to organize Town Meeting tointroduce ALMA Cycle 3 policies and capabilities, and to demonstrate various tools.
“KaVA Science Working Group meeting” and “The 8th East Asia VLBI workshop 2015”
Date: 6 - 10 Jul 2015
Venue: Hokkaido University Conference Hall
A lot of notable progress on VLBI and related activities has been achieved recently in East Asia.
In Japan, VERA has been continuously producing progressive results in astrometry andastrophysics, while the Japanese VLBI Network (JVN) has achieved regular operation ofhigh-sensitivity array including several 30-m class telescopes. In Korea, the Korean VLBI
Network started open-use observations. Furthermore, the joint VLBI array, KVN and VERA
array (KaVA), started open-use observations. Now, VERA, KVN and KaVA are open for all theastronomers in Korea, Japan, China and Taiwan. Large science project with KaVA, in addition,
have also kicked-off for extensive studies in star-formation, AGNs, astrometry and evolvedstars. In China, Tianma 65-m telescope, which will be a key station of Chinese VLBI Network(CVN), has already started scientific observation. In addition to the Greenland telescope project
promoted by ASIAA in Taiwan, the East Asian Core Observatory (EAO) has recently started
operation of the James Clerk Maxwell Submillimetre Telescope (JCMT). These telescopes willplay a key role in future submillimeter VLBI project in East Asia. In this workshop, futurecollaborations in East Asia region to enhance VLBI and related activities including thesecurrent / new telescopes will be discussed, based on latest scientific results and technicalachievements/developments.

14th IVS Technology Development Center Symposium
Date: June 25, 2015
Place: National Institute of Information and Communications Technology, Kashima SpaceTechnology Center
Developments of antenna and observation system based on the VGOS specification of thenext-generation broadband geodetic VLBI system promoted by IVS is advanced in eachcountry now (the U.S., Germany, Spain, Japan, Russia, etc.).
In the last year Geographical Survey Institute, an antenna with new VGOS specification wasinstalled in Ishioka, Ibaraki, and observations have been started.
In NICT, development of the broadband VLBI system (Gala-V) based on VGOS has been made.
The wideband receiving system which can observe 6.4 to 15 GHz was installed in Kashima
34-m radio telescope, and it was succeeded in the VLBI observation with 8GHz bandwidth withIshioka. This bandwidth is the world record now. Another activities such as collaboration ofVERA (Japan) and KVN (Korea), or 230 GHz VLBI test observation are ongoing. The scope of資料5-J

this symposium is from the development of such a new observation system, a new technicaldevelopment concept and a geodetic survey, astronomical researches, GNSS technology, andspace geodesy technical based on VLBI and related techniques.
SNR Workshop 2015
Date: June 18-19
Venue: Nagoya University
Scientific rationale: Supernova remnants (SNRs) are the most energetic objects in the Galactic
disk, and have been observed at various wavelengths from radio to γ rays. One of the mostspectacular features of SNRs is the fast moving expanding shells whose velocity is measured tobe 3000-5000 km s-1. Recent observations of the shells in X rays as well as radio continuum
emission have provided a wealth of information on their physical/kinematical properties. It isalso remarkable that the dense interstellar medium interacting with the shells is likely playing akey role to produce X rays and γ rays as shown by comparisons with HI/CO and dust emission.
Theoretical works on cosmic-ray acceleration/escaping in SNRs are unveiling details of
cosmic-ray acceleration/propagation by magneto-hydro-dynamical numerical simulations which
will be compared with observations. In this 2-day workshop, we invite observers and theorists
in order to stimulate active interaction and exchange of ideas on SNRs.