The observed angular diameter of a source depends on the curvature of spacetime (i.e. the cosmology). For a fixed linear diameter Dl:
where z is the redshift, Ho is the Hubble constant, and qo is the deceleration parameter. Typical values are Ho = 70 km/s/Mpc and qo = 0.5.
|
|
|
| [back to the topics page] | [back to astro 201 home page] | [back to Astro 233 FAQ page] |