distance modulus

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distance modulus

(moj -ŭ-lŭs) The difference between the apparent magnitude, m , and the absolute magnitude, M , of a star and therefore a measure of distance (see magnitude):
m M = 5 log(d /10) = 5 logd – 5

where d is the distance in parsecs. Distance modulus is used to determine the distances of stars and stellar clusters. It is corrected for interstellar extinction by an additional term (see magnitude).

Distance Modulus


in astronomy, the difference between the apparent (m) and absolute (M) magnitudes of a celestial body. This quantity is used to describe distances to stars and stellar systems. Whereas M depends only on the intrinsic luminosity of a star, m depends also on the distance r (in parsecs) to the star, that is, m – M = 5 log r — 5.

distance modulus

[′dis·təns ‚mäj·ə·ləs]
References in periodicals archive ?
In order to compute the luminosity distance we use the redshift adjusted distance modulus provided in [2] which is as follows:
The distance modulus [mu] = m - M is the difference between the apparent magnitude m and the absolute magnitude M.
Below is shown the derivation of the redshift adjusted distance modulus.
Planck's law for the energy of the photon leads to a redshift correction to the distance modulus
08 magnitude added to the distance modulus errors to allow for the intrinsic dispersion of the supernova luminosities.

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