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11 - Projected Dynamics

from Part III - Collisionless Systems

Published online by Cambridge University Press:  28 May 2021

Luca Ciotti
Affiliation:
Università degli Studi, Bologna, Italy
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Summary

When observed as astronomical objects, stellar systems appear projected on the plane of the sky. As a consequence, it is important to set the framework for a correct understanding of the relation between intrinsic dynamics and projected properties. Unfortunately, while it is always possible (at least in principle) to project a model and then compare the results with observational data, the operation of inversion (i.e., the recovery of three-dimensional information starting from projected properties) is generally impossible due to obvious geometric degeneracies. Spherical and ellipsoidal geometries are among the few exceptional cases that will be discussed in some depth in Chapter 13. Here, instead, the reader is provided with some of the general concepts and tools needed for projecting the most important properties of stellar systems on a projection plane.

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Publisher: Cambridge University Press
Print publication year: 2021

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  • Projected Dynamics
  • Luca Ciotti, Università degli Studi, Bologna, Italy
  • Book: Introduction to Stellar Dynamics
  • Online publication: 28 May 2021
  • Chapter DOI: https://doi.org/10.1017/9780511736117.015
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  • Projected Dynamics
  • Luca Ciotti, Università degli Studi, Bologna, Italy
  • Book: Introduction to Stellar Dynamics
  • Online publication: 28 May 2021
  • Chapter DOI: https://doi.org/10.1017/9780511736117.015
Available formats
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Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Projected Dynamics
  • Luca Ciotti, Università degli Studi, Bologna, Italy
  • Book: Introduction to Stellar Dynamics
  • Online publication: 28 May 2021
  • Chapter DOI: https://doi.org/10.1017/9780511736117.015
Available formats
×