Galactic cigar

时间:2019-03-03 05:11:10166网络整理admin

A study in Japan has produced evidence that our Galaxy is of the ‘barred’ spiral type, with a cigar-shaped core of matter projecting out of the centre. Naomasa Nakai, of the Nobeyama Radio Observatory, used a 45-metre radio telescope for the study. He compared the distribution of carbon monoxide gas in our Galaxy with the patterns of three known barrel spiral galaxies: Maffei II, NGC2903 and NGC253. Nakai found that carbon monoxide distribution in all four galaxies was identical, with peak densities at the centre and some distance from the centre. Normal spiral galaxies have one peak. He postulates a bar structure at the centre of our galaxy projecting at 90 degrees from the galactic longitude. Carbon monoxide was used because it is the second most commonly observed gas after hydrogen,