The Messenger Telescopes and Instrumentation

Modelling Data in CASA

Authors
  • Möller, Thomas [University of Cologne, Germany]
  • Schilke, Peter [University of Cologne, Germany]
  • Hogerheijde, Michiel [Leiden University, the Netherlands; Allegro ALMA Regional Centre (ARC) Node, Leiden, the Netherlands; University of Amsterdam, the Netherlands]
  • Stewart, Ian [Leiden University, the Netherlands; Allegro ALMA Regional Centre (ARC) Node, Leiden, the Netherlands]
  • Schaaf, Reinhold [Bonn University, Germany; German ARC Node, Argelander Institute for Astronomy, Bonn University, Germany]
  • Harsono, Daniel [Leiden University, the Netherlands; Allegro ALMA Regional Centre (ARC) Node, Leiden, the Netherlands]

Section
Telescopes and Instrumentation
Abstract

The Common Astronomy Software Applications (CASA) package provides a powerful tool for post-processing Atacama Large Millimeter/submillimeter Array (ALMA) and Karl G. Jansky Very Large Array (VLA) observations, but contains only rudimentary functions for modelling the data. In order to derive physical parameters as well as information on the location and the kinematics of the emitting gas, modelling of the observed data is inescapable. Such modelling can take the form of inference — where physical parameters are inferred from the data — or forward modelling — where model calculations are used to produce synthetic observations for comparison with data. We present two interfaces that allow the use of modelling tools for both flavours from within CASA: the eXtended CASA Line Analysis Sofware Suite (XCLASS); and Adaptable Radiative Transfer Innovations for Submillimeter Telescopes (ARTIST).


Dates
Created: 2018-12-01/2018-12-31
Length
4 pages

Cite this article:

T. Möller, P. Schilke, M. Hogerheijde, I. Stewart, R. Schaaf, D. Harsono; Modelling Data in CASA. The Messenger 174 (December 2018): 14–17. https://doi.org/10.18727/0722-6691/5107