How to Calculate Inclination Angle for Galaxies in the Tully-Fischer Relation

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SUMMARY

The discussion focuses on calculating the inclination angle of galaxies within the context of the Tully-Fischer relation. The user initially struggled with determining the inclination angle using the major and minor axis dimensions of galaxies, assuming they are circular systems and infinitely thin disks. The confusion arose from the output of Excel, which provides angles in radians rather than degrees. Ultimately, the user clarified their understanding and resolved the issue independently.

PREREQUISITES
  • Understanding of the Tully-Fischer relation in astrophysics
  • Familiarity with geometric properties of ellipses
  • Basic proficiency in using Microsoft Excel for calculations
  • Knowledge of inclination angles in astronomical contexts
NEXT STEPS
  • Research the mathematical derivation of the Tully-Fischer relation
  • Learn how to convert radians to degrees in Excel
  • Explore the implications of assuming galaxies as infinitely thin disks
  • Study the effects of inclination angle on galaxy observations and measurements
USEFUL FOR

Astronomers, astrophysics students, and researchers involved in galaxy measurements and the Tully-Fischer relation will benefit from this discussion.

Snowdeity
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I've got a lab. And the deal is, you're measuring certain things on various galaxies and eventually calculating the Tully-Fischer relation. Anyways, part of it is calculating an inclination angle to all of the galaxies measured. And I'm stuck with this. I have the major and minor axis dimensions to each galaxy but not really much else. Have the magnitude of the flux through each of them, but don't think that would help. I'm somewhat bad at geometrical relations, can anyone help clue me in on getting inclination angles with just the dimensions of the galaxy and assuming that they're intrinsically circular systems and infinitely thin disks?
 
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Nevermind, had it right beforehand. Excel just spits out angles in radians, got confused, hehe.
 

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