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Is It Possible to Know Cosmological Fine-tuning?
Stockholms universitet, Naturvetenskapliga fakulteten, Matematiska institutionen.ORCID-id: 0000-0003-2767-8818
Antal upphovsmän: 32024 (Engelska)Ingår i: Astrophysical Journal Supplement Series, ISSN 0067-0049, E-ISSN 1538-4365, Vol. 271, nr 2, artikel-id 56Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Fine-tuning studies whether some physical parameters, or relevant ratios between them, are located within so-called life-permitting intervals of small probability outside of which carbon-based life would not be possible. Recent developments have found estimates of these probabilities that circumvent previous concerns of measurability and selection bias. However, the question remains whether fine-tuning can indeed be known. Using a mathematization of the concepts of learning and knowledge acquisition, we argue that most examples that have been touted as fine-tuned cannot be formally assessed as such. Nevertheless, fine-tuning can be known when the physical parameter is seen as a random variable and it is supported in the nonnegative real line, provided the size of the life-permitting interval is small in relation to the observed value of the parameter.

Ort, förlag, år, upplaga, sidor
2024. Vol. 271, nr 2, artikel-id 56
Nyckelord [en]
Anthropic principle, Bayesian statistics, Analytical mathematics, Cosmological constant, Cosmological parameters
Nationell ämneskategori
Astronomi, astrofysik och kosmologi
Identifikatorer
URN: urn:nbn:se:su:diva-228713DOI: 10.3847/1538-4365/ad2c88ISI: 001197225000001Scopus ID: 2-s2.0-85189897895OAI: oai:DiVA.org:su-228713DiVA, id: diva2:1854471
Tillgänglig från: 2024-04-25 Skapad: 2024-04-25 Senast uppdaterad: 2024-04-25Bibliografiskt granskad

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Hössjer, Ola

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