資料8-JActivity Report of Commission JFebruary 2013 to July 2013
July 16, 2013
Kenta Fujisawa (Yamaguchi University)

ALMA project
Final ACA Antenna Delivered with the new name "Morita Array" (May 07, 2013)
The twelfth 7-m antenna developed by Japan was delivered to the high site in
Chajnantor on April 29, 2013. Now all the 16 antennas of the Atacama Compact
Array (ACA) are installed at the Array Operations Site at the altitude of 5,000 m
and awaiting to unveil secrets of the universe.
ALMA, the Atacama Large Millimeter/submillimeter Array, is an international
partnership of East Asia, Europe and North America in cooperation with theRepublic of Chile, to build a giant radio telescope by connecting 66 high precisionantennas. In this global venture, Japan is responsible for the development of 16antennas (four 12-m antennas and twelve 7-m antennas), ultra-cooled radio
receivers for three frequency bands which are installed in all the 66 antennas, andhigh-speed computer, or the correlator, to combine the signals collected by Japanese
16 antennas. The Atacama Compact Array, a major deliverable from Japan to theALMA project, consists of the 16 antennas and receivers installed therein and theACA correlator. The ACA is able to correct the radio waves emanated from celestial
objects with a large angular size, such as molecular clouds and nearby galaxies, andmake ALMA's radio image fidelity higher.

1Latest scientific topc:
Successful ALMA First Radio Imaging with Band 4 Receiver (June 27, 2013)
ALMA telescope successfully captured its first radio image with Band 4
receiver developed by Japan in an ALMA test observation conducted in January
2013. The target object was IRAS16293-2422, a protostar (baby star) in theconstellation of Ophiuchus. The telescope received radio emission from carbon
sulfide (CS) molecules surrounding the star and imaged their distribution.

Band 4 Receiver (54 cm high) developed by Japan and ALMA Telescope. The
receiver is set in the cabin part of the antenna.

Activities of meetings
From Planets to Distant Galaxies: SPICA's New Window on the Cool Universe
Date : 18-21 June, 2013
Venue: The University of Tokyo, Japan
URL: http://www.ir.isas.jaxa.jp/SPICA/spica2013/
Aims and Scope: The first international conference on the science of SPICA (SpaceInfrared Telescope for Cosmology and Astrophysics) mission will be held on 18-21June, 2013. The conference is open to interested scientists from around the world.
The primary aims of the conference are to introduce the scientific capabilitiesof the SPICA mission to the international community, and to foster interactions in
the IR community on how to optimally utilise this new facility to further explore thephysical processes in formation and evolution of planets, stars and galaxies.

2International Conference on Cosmic Microwave Background
Date: 10-14 June 2013
Place: Okinawa Institute od Science and Technology Graduate University (OIST)
Overview:
Detection of primordial gravitational waves would be one of the mostsignificant scientific discoveries of all time. Such a detection would be a direct
evidence for inflation and shed light on fundamental physics such as quantum
gravity behind inflation. The accurate measurement of CMB polarization is the best
way to discover the primordial gravitational waves. It is thus one of the greatest
challenges in experimental cosmology in the next decade. Thanks to remarkabletechnological development in recent years, the detection is not a mere dream
anymore but becoming factual. The primary objective of the conference is toexchange ideas on how to reach the precision at the level of r=0.001 or even better,
where r is the tensor-to-scalar ratio. Another important goal of the conference is toevaluate scientific values of such a measurement, where relations to otherobservations such as CMB temperature anisotropies are also important. To theseends, the conference will have talks from all the CMB projects in operation, inpreparation or in planning.

ALMA Workshop 2012: EA ALMA Development Workshop 2013
Date: July 8 - 9, 2013
Place: National Astronomical Observatory of Japan, Mitaka, Large Seminar Room
Website:http://alma-intweb.mtk.nao.ac.jp/~diono/meetings/EA_Development_Meeti
ng/Welcome.html
Aims: The Atacama Large Millimeter/submillimeter Array (ALMA) is alreadyproducing a growing number of impressive and scientifically compelling results
during its first year of operation as the most powerful mm/submm interferometer inthe world. In order to maintain ALMA as the state-of-the-art facility over thecourse of its projected life of 30+ years, continuing technical upgrades anddevelopment of new capabilities are essential. The scope of this meeting is topresent the status of ongoing future development studies/projects in the East Asianregion which will be the main development focus for the next 5 - 10 years, and todiscuss the technical requirements and the potential science achievable with alarger scale development which are envisioned in the next 10 - 20 years.
The anticipated new science capabilities are, for example,3

-- Installation of multi-beam receivers for sensitive and large field mapping
observations-- Development of ultra-wide bandwidth receiver for multi-line observations
Other innovative ideas are also welcome and encouraged.
Workshop on the Galactic Center
Date: June 3, 2013
Place: Nagoya University
Aims: The Galactic Center is one of the most complex region in our galaxy.
Intensive observations at various wavelengths have been made to date, and unified
interpretations throughout the results of all wavelengths have been expected. The
aim of this workshop is as follows: theoreticians and observers at various
wavelengths come together in order to exchange the latest results andinterpretations, especially focusing on the strong magnetic field, molecular clouds
around the massive black hole, and simulations.

Technical Development Center Symposium for the International VLBI Service 2013
Date: June 6, 2013
Place: NICT Kashima
Aims: NICT is a member of IVS (International VLBI Service for Geodesy andAstrometry) and has contributed to the development of VLBI technologies. Aspecification called VLBI2010 provide the next generation specification of VLBI
observation. In some countries, new telescopes satisfying the specification areunder construction, and technical developments for VLBI2010 are being made inparallel. In this symposium together with researcher and company, we will discusson the recent development for VLBI2010 and related engineering.

Workshop on the chemistry in the extra galaxies
Date: June 12, 2013
Place: Tokyo University
Aims: Astrochemistry is one of the important fields of astrophysics which revealed
not only the chemical process in the interstellar field but also the physical evolutionof astronomical objects. The aim of this workshop is to exchange the latest results of
the astrochemistory and discuss on the future observation focusing on the ALMAera.

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