Reconstructing orbits of galaxies in extreme regions ( roger v2.0 ): an extension to intermediate mass systems

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ID: 331631
2026
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Abstract
Abstract In this paper, we present an updated version of the roger code, called roger v2.0, developed to perform the orbital classification of galaxies residing in and around galaxy groups and clusters. In addition to the projected phase-space coordinates, the new version incorporates the host halo mass as an additional input parameter. Although the inclusion of the halo mass leads to only modest changes in the classification, it contributes to improving the overall robustness of the method. We also extend the range of host halo masses over which roger can be applied, enabling the analysis of systems with masses down to 1013.5h−1M⊙. We further provide a Python implementation of the new code, which will be made publicly available. This implementation enables users to efficiently and robustly classify arbitrary galaxy samples using either version of the method. Moreover, it allows users to train a customized classifier on an alternative training set, providing the flexibility to adapt the method to different datasets and scientific applications.
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openalex_W7220869396 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Martín de los Rios, Héctor J. Martínez, Andrés N. Ruiz, Selene Levis, Valeria Coenda, H. Muriel
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Journal monthly notices of the royal astronomical society
Year 2026
DOI
10.1093/mnras/stag1906
URL
https://doi.org/10.1093/mnras/stag1906
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