Glossary

Glossary#

Glossary terms for units found within the codebase.

arcsec#: Arcsecond, a unit of angular measurement equal to 1/3600 of a degree. Used here to denote coordinates in the lens plane, deflection angles, the core radius, the scale radius, the Einstein radius of the lens, and the softening parameter.
arcsec^2#: Square arcseconds, used to denote the gravitational lensing potential at given coordinates and also used in the calculation of the radius in the lensing potential and convergence formulas.
Msun#: Solar mass, used here to denote the total mass of the lens.
Mpc#: Megaparsec, a unit of distance used in astronomy, used to denote distances related to the angular diameter distance in the cosmology calculations.
Msun/Mpc^2#: Solar masses per square megaparsec, used to denote the surface mass density at given coordinates and the critical surface density.
Msun/Mpc^3#: Solar masses per cubic megaparsec, used here to denote the central mass density in the central convergence calculation.
seconds#: Time unit, used here to denote the gravitational time delay.
radians#: A unit of angular measure used to denote the orientation of the lens on the sky and the position angle of the lens.
arcsec/pixel#: Arcseconds per pixel, used to denote the pixel scale of the source image in the lens plane, indicating the angular size each pixel represents.
flux#: A unit of brightness, used here to denote the intensity values within the pixelated source image and the intensity at the effective radius (Ie) of the Sersic source.
unitless#: Indicates a dimensionless quantity, used here for redshifts, the axis ratio of the lens, the power-law slope parameter of the lens model, shear components, the redshift of the lens, the concentration parameter, and the convergence of the lens.