3D-Barolo: a new 3D algorithm to derive rotation curves of galaxies

Enrico Di Teodoro, Filippo Fraternali

5/28/2015

astro-ph.GA

Official code: editeodoro/Bbarolo (40 stars, GPL-2.0, last commit 2026-10-08).

Abstract

We present 3D-Barolo, a new code that derives rotation curves of galaxies from emission-line observations. This software fits 3D tilted-ring models to spectroscopic data-cubes and can be used with a variety of observations: from HI and molecular lines to optical/IR recombination lines. We describe the structure of the main algorithm and show that it performs much better than the standard 2D approach on velocity fields. A number of successful applications, from high to very low spatial resolution data are presented and discussed. 3D-Barolo can recover the true rotation curve and estimate the intrinsic velocity dispersion even in barely resolved galaxies (about 2 resolution elements) provided that the signal to noise of the data is larger that 2-3. It can also be run automatically thanks to its source-detection and first-estimate modules, which make it suitable for the analysis of large 3D datasets. These features make 3D-Barolo a uniquely useful tool to derive reliable kinematics for both local and high-redshift galaxies from a variety of different instruments including the new-generation IFUs, ALMA and the SKA pathfinders.

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Code Implementations(1)

editeodoro/BbaroloOfficial100%

GPL-2.0

Bbarolo is a 3D fitting tool to derive the kinematics of galaxies from emission-line observations.

4011M4, C++May 25, 20151 weeks agoGPL-2.0

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Cite this paper

@article{teodoro2015dbarolo,
  title  = {3D-Barolo: a new 3D algorithm to derive rotation curves of galaxies},
  author = {Enrico Di Teodoro and Filippo Fraternali},
  year   = {2015},
  eprint = {1505.07834},
  archivePrefix = {arXiv},
  url    = {https://arxiv.org/abs/1505.07834}
}

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