Time drift of subtended angles as a new cosmological probe
Hongbao Zhang, Zong-Hong Zhu
TL;DR
This paper proposes using the time drift of subtended angles as a novel method for measuring the universe's expansion rate, leveraging future microarcsecond astrometry capabilities.
Contribution
It introduces a new cosmological probe based on the time drift of subtended angles, enabling direct measurement of the Hubble expansion rate.
Findings
Potential for direct measurement of Hubble rate
Applicability with upcoming microarcsecond astrometry
Novelty in cosmological probing methods
Abstract
We here propose the time drift of subtended angles as a new possible cosmological probe. In particular, with the coming era of microarcsecond astrometry, our proposal can be used to measure the Hubble expansion rate of our universe in a direct way.
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Taxonomy
TopicsElectrical and Electromagnetic Research · Advanced Mathematical Theories and Applications · Geophysics and Sensor Technology