Doppler Tomography in Cataclysmic Variables: an historical perspective

TL;DR

This paper reviews the development of Doppler tomography in cataclysmic variables over fifty years, highlighting its historical evolution from basic spectral analysis to advanced 3D imaging techniques.

Contribution

It provides a comprehensive historical perspective on Doppler tomography in cataclysmic variables, emphasizing technological advancements and methodological progress.

Findings

Evolution from 1D spectral analysis to 3D imaging.

Development of Roche Tomography and time modulation techniques.

Enhanced understanding of accretion disc velocity profiles.

Abstract

To mark the half-century anniversary of this newly-born field of Cataclysmic Variables, a special emphasis is made in this review, on the Doppler Effect as a tool in astrophysics. The Doppler Effect was in fact, discovered almost 170 years ago, and has been since, one of the most important tools which helped to develop modern astrophysics. We describe and discuss here, its use in Cataclysmic Variables which, combined with another important tool, the tomography, first devised for medical purposes 70 years ago, helped to devise the astronomical Doppler Tomography, developed only two decades ago. A discussion is made since the first trailed spectra provided a one dimensional analysis of these binaries; on the establishment of a 2D velocity profiling of the accretion discs; and unto modern techniques, which include Roche Tomography, time modulation and 3D imaging.