Science News

Curated by RSF Research Staff

Cosmic clocks

The rotational velocity of galaxies has long been a study of interest, with its intriguing relationship with distance leading to the hypothesis of dark matter. A new study has now added to the intrigue and shown that the velocity distance relationship is constant and thus no matter what the size of the galaxy, it will always take a billion years for one complete rotation.

In a paper recently published in the Monthly Notices of the Royal Astronomical Society, Gerhardt Meurer and his team present their analysis of disc galaxies that were observed at the 21 cm Hydrogen wavelength – which is the 1420 MHz transition between the two levels at the ground state of hydrogen. Their findings show, that for disc galaxies, their outermost radius displays a nearly-linear radius velocity relationship implying a constant orbital time of approximately 1 Giga year – that is one billion years. This relationship is independent of the size of the galaxy, suggesting an interior density relationship inherent to all galaxies.

These results are not surprising to the field of unified physics in which scalar relationships exist across all scales and all systems. The relationship exhibited by the disc galaxies observed by Meurer and his team may indeed reveal a fundamental relationship that exits in all systems at all scales.



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