National Astronomical Observatory of Japan

Result of the Initial Testing of the Japanese ACA 12-m Antenna to be Delivered to ALMA

| Science


A gigantic radio telescope ALMA (Atacama Large Millimeter/submillimeter Array) is under construction in Chile through collaboration among Japan, North America, and Europe. By using one of the parabolic antennas constructed by Japan for ALMA, an image of the moon was obtained at the radio wavelengths. This is the first radio image from a celestial object in the ALMA project, and it is shown that the ALMA project steadily achieved the milestone of the initial testing to confirm the antenna performance.