Absolute magnitude is the
measurement of the brightness of celestial bodies using inverse
logarithmic calculations in astronomical calculations and expressed
as a mathematical value. This process involves mathematically
expressing their luminosity, as a hypothesis, by placing objects at
an equal distance from the observer (10 parsecs that equals to 32.6
light years).
Detailed Definition:
Absolute magnitude is also
called absolute visual magnitude, which is a hypothesis that predicts
the mathematical calculation of the luminosity of different celestial
bodies, taking into account fixed distances, and comparing the
luminosities of these objects. The mathematical formula used to
calculate this luminosity is as follows;
Mv:
Absolute magnitude
m:
Apparent magnitude
d:
Distance in 10 parsecs
Mv
= m – 2.5 log [d/10]²
The
apparent magnitude here, on an inverse scale, indicates how bright
celestial objects appear to our eyes. Because it's an inverted scale,
high numbers indicate dim objects and low numbers indicate bright
objects. The brightest object known and measured on this scale has a
value of -10, while the star Sirius has a luminosity of 1.4, and our
sun has a luminosity of 4.8.
‘’Colour–magnitude
diagram, in astronomy, graph showing the relation between the
absolute magnitudes (brightnesses) of stars and their colours, which
are closely related to their temperatures and spectral types.’’
(The
Editors of Encyclopaedia Britannica. (1998, July 20).
Colour–magnitude diagram | astronomy. Encyclopedia Britannica.
https://www.britannica.com/science/colour-magnitude-diagram)
Translations of
Terms/Concepts into Partner Languages:
Apparent
and Absolute Magnitudes. (n.d.-b).
https://www.phys.ksu.edu/personal/wysin/astro/magnitudes.html
Michel
van Biezen. (2014, April 9). Astronomy - Measuring Distance, Size,
and Luminosity (18 of 30) Absolute Magnitude [Video]. YouTube.
https://www.youtube.com/watch?v=yfsUhOPCMaM
