Multi-resolution imaging and spectra of extended sources

Lawrence Rudnick

Research output: Contribution to journalShort surveypeer-review

Abstract

I introduce a straightforward technique for the filtering of extended astronomical images into components of different spatial scales. For a positive original image, each component is positive definite, and the sum of all components equals the original image. In this way, the components are each individually suitable for flux measurements and broadband spectra calculations. I present an illustration of this technique on the radio galaxy Cygnus A.

Original languageEnglish (US)
Pages (from-to)101-103
Number of pages3
JournalNew Astronomy Reviews
Volume46
Issue number2-7
DOIs
StatePublished - 2002

Bibliographical note

Funding Information:
This work is supported by NSF grant AST 96-16964 and AST AST 96-19438 at the University of Minnesota. I am grateful to John Dickey, Andrew Young, Barron Koralesky and Deb Katz-Stone for many useful ideas and feedback.

Keywords

  • Galaxies: Active
  • Galaxies: Individual (Cygnus A)
  • Radiation mechanisms: Non-thermal
  • Radio continuum: Galaxies
  • Techniques: Image processing

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