Determination of Hubble constant from Megamaser Cosmology Project using profile likelihood.
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| Title: | Determination of Hubble constant from Megamaser Cosmology Project using profile likelihood. |
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| Authors: | Barua, Shubham1 (AUTHOR) ph24resch01006@iith.ac.in, Ramakrishnan, Vyaas1 (AUTHOR) vyaas3305@gmail.com, Desai, Shantanu1 (AUTHOR) shntn05@gmail.com |
| Source: | Astrophysics & Space Science. Jun2025, Vol. 370 Issue 6, p1-7. 7p. |
| Subjects: | Frequentist statistics, Bayesian analysis, Bayesian field theory, Physical cosmology, Proof of concept, Hubble constant |
| Abstract: | The Megamaser Cosmology Project inferred a value for the Hubble constant given by H 0 = 73.9 ± 3.0 km/sec/Mpc. This value was obtained using Bayesian inference by marginalizing over six nuisance parameters, corresponding to the velocities of the megamaser galaxy systems. We obtain an independent estimate of the Hubble constant with the same data using frequentist inference. For this purpose, we use profile likelihood to dispense with the aforementioned nuisance parameters. The frequentist estimate of the Hubble constant is given by H 0 = 73.5 − 2.9 + 3.0 km/sec/Mpc and agrees with the Bayesian estimate to within 0.2 σ , and both approaches also produce consistent confidence/credible intervals. Therefore, this analysis provides a proof-of-principle application of profile likelihood in dealing with nuisance parameters in cosmology, which is complementary to Bayesian analysis. [ABSTRACT FROM AUTHOR] |
| Copyright of Astrophysics & Space Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 186711442 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Determination of Hubble constant from Megamaser Cosmology Project using profile likelihood. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Barua%2C+Shubham%22">Barua, Shubham</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ph24resch01006@iith.ac.in</i><br /><searchLink fieldCode="AR" term="%22Ramakrishnan%2C+Vyaas%22">Ramakrishnan, Vyaas</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> vyaas3305@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Desai%2C+Shantanu%22">Desai, Shantanu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> shntn05@gmail.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Astrophysics+%26+Space+Science%22">Astrophysics & Space Science</searchLink>. Jun2025, Vol. 370 Issue 6, p1-7. 7p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Frequentist+statistics%22">Frequentist statistics</searchLink><br /><searchLink fieldCode="DE" term="%22Bayesian+analysis%22">Bayesian analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Bayesian+field+theory%22">Bayesian field theory</searchLink><br /><searchLink fieldCode="DE" term="%22Physical+cosmology%22">Physical cosmology</searchLink><br /><searchLink fieldCode="DE" term="%22Proof+of+concept%22">Proof of concept</searchLink><br /><searchLink fieldCode="DE" term="%22Hubble+constant%22">Hubble constant</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The Megamaser Cosmology Project inferred a value for the Hubble constant given by H 0 = 73.9 ± 3.0 km/sec/Mpc. This value was obtained using Bayesian inference by marginalizing over six nuisance parameters, corresponding to the velocities of the megamaser galaxy systems. We obtain an independent estimate of the Hubble constant with the same data using frequentist inference. For this purpose, we use profile likelihood to dispense with the aforementioned nuisance parameters. The frequentist estimate of the Hubble constant is given by H 0 = 73.5 − 2.9 + 3.0 km/sec/Mpc and agrees with the Bayesian estimate to within 0.2 σ , and both approaches also produce consistent confidence/credible intervals. Therefore, this analysis provides a proof-of-principle application of profile likelihood in dealing with nuisance parameters in cosmology, which is complementary to Bayesian analysis. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Astrophysics & Space Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=186711442 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s10509-025-04454-3 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: 1 Subjects: – SubjectFull: Frequentist statistics Type: general – SubjectFull: Bayesian analysis Type: general – SubjectFull: Bayesian field theory Type: general – SubjectFull: Physical cosmology Type: general – SubjectFull: Proof of concept Type: general – SubjectFull: Hubble constant Type: general Titles: – TitleFull: Determination of Hubble constant from Megamaser Cosmology Project using profile likelihood. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Barua, Shubham – PersonEntity: Name: NameFull: Ramakrishnan, Vyaas – PersonEntity: Name: NameFull: Desai, Shantanu IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 0004640X Numbering: – Type: volume Value: 370 – Type: issue Value: 6 Titles: – TitleFull: Astrophysics & Space Science Type: main |
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