Visualization-Directed Interactive Model-Fitting to Spectral Data Cubes

TL;DR

This paper introduces an interactive visualization method for spectral data cubes that combines model fitting with visualization tools, enhancing understanding of complex 3D velocity structures in astronomical data.

Contribution

It presents a novel approach using S2PLOT for interactive model-data comparison and employs 3D shapelets for quantitative analysis of spectral data cubes.

Findings

Enhanced visualization of velocity structures in spectral data cubes.

Improved model-data comparison through interactive tools.

Quantitative analysis enabled by 3D shapelets.

Abstract

Spectral datasets obtained at radio frequencies and optical/IR wavelengths are increasing in complexity as new facilities and instruments come online, resulting in an increased need to visualize and quantitatively analyze the velocity structures. As the visible structure in spectral data cubes is not purely spatial, additional insight is required to relate structures in 2D space plus line-of-sight velocity to their true three-dimensional (3D) structures. This can be achieved through the use of models that are converted to velocity-space representations. We have used the S2PLOT programming library to enable intuitive, interactive comparison between 3D models and spectral data, with potential for improved understanding of the spatial configurations. We also report on the use of 3D Cartesian shapelets to support quantitative analysis.