Time drift of subtended angles as a new cosmological probe

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.

JHEP style, 7 pages, 4 figures

References in corpus (1)

• Getting ready for the micro-arcsecond era