Stellar Spectra and Radiation Fields

  • Tomokazu Kogure
  • Kam-Ching Leung
Part of the Astrophysics and Space Science Library book series (ASSL, volume 342)


Apparent magnitude m of a star is defined by the logarithms of energy I received above the Earth’s atmosphere as follows:
$$ m = - 2.5\log I + c, $$
where c is the constant to be determined by comparison with a standard star.


Absorption Line Optical Depth Spectral Type Equivalent Width Local Thermodynamic Equilibrium 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Further reading

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Tomokazu Kogure
    • 1
  • Kam-Ching Leung
    • 2
    • 3
    • 4
  1. 1.Kyoto UniversityYawata, KyotoJapan
  2. 2.Institute of Astronomy and AstrophysicsAcademia SinicaTaiwan, China
  3. 3.Department of Physics & AstronomyUniversity of Nebraska-LincolnLincolnUSA
  4. 4.Brace LaboratoryUSA

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