proper_time

Protocols

StandardCosmology.proper_time()

DistanceMeasures.proper_time()

ProperDistanceMeasures.proper_time()

HasProperTime.proper_time()

Reference

cosmo.proper_time(z: InputT, /) → Array

cosmo.proper_time(z1: InputT, z2: InputT, /) → Array

Proper time \(t\) in Gyr.

The proper time is the proper distance divided by c.

Parameters:

zArray, positional-only

z1, z2Array, positional-only

Input redshifts. If one argument z is given, the time \(t(0, z)\) is returned. If two arguments z1, z2 are given, the time \(t(z_1, z_2)\) is returned.

Returns:

Array

The proper time \(t\) in Gyr.