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Running Hubble Constant with the Redshift as a Marker of Evolutionary Dark Energy

  • Nakia Carlevaro
  • Giovanni Montani
  • Maria Giovanna Dainotti
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Abstract

We discuss the interpretation of an observed running Hubble constant with the redshift, in terms of the possible underlying physical scenario. Assuming, like in the ΛCDM model, that the matter and dark energy components do not directly interact, we arrive at the conclusion that the physical content of the cosmological dynamics can always be represented with an evolutionary dark energy paradigm. We discuss both the case of the power-law running Hubble constant, and that of an optimized fitting model, both studied with the binned Pantheon Sample of the Type Ia Supernovae data. These two cases turn out to be associated with a phantom-like evolutionary dark energy.

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Cite

BibTeXRIS
BibTeX
@misc{carlevaro2026running,
  title = {{Running Hubble Constant with the Redshift as a Marker of Evolutionary Dark Energy}},
  author = {Nakia Carlevaro and Giovanni Montani and Maria Giovanna Dainotti},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.17393},
  eprint = {2609.17393},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.17393},
}
RIS
TY  - UNPB
TI  - Running Hubble Constant with the Redshift as a Marker of Evolutionary Dark Energy
AU  - Nakia Carlevaro
AU  - Giovanni Montani
AU  - Maria Giovanna Dainotti
PY  - 2026
DA  - 2026/09/15
PB  - arXiv
DO  - 10.48550/arxiv.2609.17393
UR  - https://arxiv.org/abs/2609.17393
AB  - We discuss the interpretation of an observed running Hubble constant with the redshift, in terms of the possible underlying physical scenario. Assuming, like in the ΛCDM model, that the matter and dark energy components do not directly interact, we arrive at the conclusion that the physical content of the cosmological dynamics can always be represented with an evolutionary dark energy paradigm. We discuss both the case of the power-law running Hubble constant, and that of an optimized fitting model, both studied with the binned Pantheon Sample of the Type Ia Supernovae data. These two cases turn out to be associated with a phantom-like evolutionary dark energy.
ER  -