5 citations · 14 across the 6 of their papers we have counts for
4 papers · 1 filter
Cosmic cable
Colin MacLaurin
I investigate the relativistic mechanics of an extended "cable" in an arbitrary static, spherically symmetric spacetime. Such hypothetical bodies have been proposed as tests of ene…
Clarifying spatial distance measurement
Colin MacLaurin
We examine length measurement in curved spacetime, based on the 1+3-splitting of a local observer frame. This situates extended objects within spacetime, in terms of a given coordi…
Schwarzschild spacetime under generalised Gullstrand-Painlevé slicing
Colin MacLaurin
We investigate a foliation of Schwarzschild spacetime determined by observers freely falling in the radial direction. This is described using a generalisation of Gullstrand-Painlev…
Expanding space, redshifts, and rigidity: Conceptual issues in cosmology
Colin MacLaurin
I examine the interpretation of photon redshifts in curved spacetime, as being gravitational or Doppler in origin. In Friedmann-Lemaître-Robertson-Walker spacetime, redshifts betwe…