Apparent Magnitude of Binary Star System

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SUMMARY

The discussion centers on calculating the apparent magnitude of a binary star system when viewed as a single point source. Participants clarify that while brightness is additive, apparent magnitude operates on a logarithmic scale, necessitating a different approach for combining the magnitudes of the two stars. The key takeaway is that one cannot simply add the magnitudes directly; instead, a logarithmic calculation must be employed to determine the combined apparent magnitude accurately.

PREREQUISITES
  • Understanding of apparent magnitude in astronomy
  • Familiarity with logarithmic scales
  • Basic knowledge of binary star systems
  • Concept of brightness and its relation to magnitude
NEXT STEPS
  • Research the formula for combining apparent magnitudes of multiple light sources
  • Study the properties of binary star systems and their light output
  • Explore logarithmic calculations in astronomical contexts
  • Learn about photometric measurements in astronomy
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Astronomy students, astrophysics enthusiasts, and anyone interested in understanding the complexities of measuring light from binary star systems.

Gammage
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I am having trouble understanding this problem. It has several parts describing a binary star system. The last part ask for the apparent magnitude of the combined light from both stars, if they were viewed as a single point. I guess my first thought was to add them, but I'm worried because apparent magnitude is a logarithmic scale. Am I overthinking this one?

Thanks
 
Astronomy news on Phys.org
Hi Gammage! :smile:

Yes, you're right to worry …

brightness is additive, but magnitude isn't. :wink:
 

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