Observations with ALMA
Cosmic dust is small solid particles consisted of silicon, carbon, iron and other elements with the size smaller than 1 micrometer.
Some types of radiation seem to be dimly emitted not from a certain object, but from the overall universe. This is called the "cosmic background radiation". The most typical is "3 K Cosmic Microwave Background Radiation," which is supposed to be a remnant of the Big Bang. However, even when many dark celestial bodies emit radiation, the emission may be observed just as "cosmic background" radiation if the sensitivity and resolution of the telescope in use is insufficient. To clear up this misidentification, astronomers need telescopes with better sensitivity and resolution.
・ Bunyo Hatsukade: Post-doctoral fellow, Kyoto University and the Japan Society for the Promotion of Science
・ Kouji Ota: Professor, Kyoto University
・ Akifumi Seko: Graduate student, Kyoto University
・ Kiyoto Yabe: Post-doctral fellow, National Astronomical Observatory of Japan, National Institutes of Natural Sciences
・ Masayuki Akiyama: Associate professor, Tohoku University
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ALMA array from the air
Credit: Clem & Adri Bacri-Normier (wingsforscience.com)/ESO