description Submillimeter Array Overview
The Submillimeter Array is a radio interferometer located near the summit of Mauna Kea on the island of Hawaii. It consists of eight movable antennas, each six meters in diameter, whose signals are combined to achieve higher angular resolution than a single antenna of comparable size. Operating at submillimeter wavelengths, it is used by astronomers to study cold dust and molecular gas in star-forming regions, circumstellar disks, nearby galaxies, and other objects that emit strongly in this part of the spectrum.
help Submillimeter Array FAQ
Where is the Submillimeter Array located?
The Submillimeter Array is located near the summit of Mauna Kea on Hawaii Island. Its high altitude helps reduce the amount of water vapor that can absorb submillimeter radiation.
How many antennas does the Submillimeter Array have?
The array consists of eight movable antennas. Each antenna is six metres in diameter, and the dishes can be repositioned for different observing configurations.
Why does the Submillimeter Array use multiple antennas?
It combines signals from separate antennas through interferometry, allowing astronomers to achieve finer angular resolution than one dish of similar size. The system is used to study cold dust, molecular clouds, star formation, and distant galaxies.
What wavelengths does the Submillimeter Array observe?
The array observes millimetre and submillimetre radio wavelengths, where cold material emits strongly. These observations can reveal molecules and dust that are difficult to study with visible-light telescopes.
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