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Peer-reviewedCC BY 4.0Monthly Notices of the Royal Astronomical Society

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

  • Martín de los Rios1
  • Héctor J Martínez1,2
  • Andrés N Ruiz1,2
  • Selene Levis1,3
  • Valeria Coenda1,2
  • Hernán Muriel1,2
  1. 1Instituto de Astronomía Teórica y Experimental, CONICET-UNC , Laprida 854, X5000BGR Córdoba ,
  2. 2Observatorio Astronómico, Universidad Nacional de Córdoba , Laprida 854, X5000BGR Córdoba ,
  3. 3Facultad de Matemática, Astronomía, Física y Computación, Universidad Nacional de Córdoba , Av. Medina Allende s/n, X5000HUA Córdoba ,
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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 1013.5 h−1 M⊙ . 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 data sets and scientific applications.

Versions

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Cite

BibTeXRIS
BibTeX
@article{rios2026reconstructing,
  title = {{Reconstructing orbits of galaxies in extreme regions ( roger v2.0 ): an extension to intermediate-mass systems}},
  author = {Martín de los Rios and Héctor J Martínez and Andrés N Ruiz and Selene Levis and Valeria Coenda and Hernán Muriel},
  journal = {Monthly Notices of the Royal Astronomical Society},
  year = {2026},
  month = oct,
  doi = {10.1093/mnras/stag1906},
  url = {https://academic.oup.com/mnras/article/doi/10.1093/mnras/stag1906/8876082},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Reconstructing orbits of galaxies in extreme regions ( roger v2.0 ): an extension to intermediate-mass systems
AU  - Martín de los Rios
AU  - Héctor J Martínez
AU  - Andrés N Ruiz
AU  - Selene Levis
AU  - Valeria Coenda
AU  - Hernán Muriel
PY  - 2026
DA  - 2026/10/07
JO  - Monthly Notices of the Royal Astronomical Society
DO  - 10.1093/mnras/stag1906
UR  - https://academic.oup.com/mnras/article/doi/10.1093/mnras/stag1906/8876082
AB  - 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 10^13.5 h^−1 M_⊙ . 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 data sets and scientific applications.
SN  - 0035-8711
SN  - 1365-2966
ER  -