astro (version 1.2)

angsize: Angular Size Conversion

Description

Converts between angular and physical size

Usage

angsize(z = 1, r = 1, inp = "arcsec", out = "kpc", c = 3E8, H = 70,  M = 0.3, L = 1-M, K = 1-M-L)

Arguments

z

redshift

r

radius

inp

input units

out

output units

c

speed of light (m/s)

H

Hubble constant (km/s/Mpc)

M

Omega M - matter

L

Omega L - energy

K

Omega K - curvature

Value

Converted size in indicated units to the given redshift with the given cosmology.

Details

Units available for conversion are: 'deg', 'rad' or 'arcsec' <==> 'm', 'pc', 'kpc' or 'Mpc'.

References

Hogg D. W., 1999, ArXiv Astrophysics e-prints, arXiv:astro-ph/9905116

See Also

The astronomy package: astro.