View in EDS HTML Full Text PDF Full Text

On modelling the surfaces of celestial bodies in quantum gravity.

Saved in:
Bibliographic Details
Title: On modelling the surfaces of celestial bodies in quantum gravity.
Authors: Calmet, Xavier1 (AUTHOR) x.calmet@sussex.ac.uk, Sebastianutti, Marco1 (AUTHOR) m.sebastianutti@sussex.ac.uk
Source: European Physical Journal C -- Particles & Fields. May2026, Vol. 86 Issue 5, p1-8. 8p.
Subjects: Quantum gravity, Stellar structure, Stellar mass, Density of stars, General relativity (Physics), Quantum perturbations
Abstract: We discuss how to model the surface of celestial bodies (such as stars) in quantum gravity to ensure the regularity of quantum corrections to classical solutions of general relativity at the surface of such bodies. Specifically, we use the Vilkovisky–DeWitt unique effective action to calculate universal quantum corrections to the exterior metric for a class of stellar models. Previous descriptions, obtained via a Heaviside density profile, are "pathological" at the surface of the star due to the divergence of the metric functions and associated curvature invariants. Introducing a modified version of the Tolman VII density profile, we determine the minimal degree of differentiability required for this function to generate regular quantum corrections at the star's surface. [ABSTRACT FROM AUTHOR]
Copyright of European Physical Journal C -- Particles & Fields 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
Full text is not displayed to guests.
FullText Links:
  – Type: pdflink
Text:
  Availability: 1
Header DbId: egs
DbLabel: Engineering Source
An: 194633874
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: On modelling the surfaces of celestial bodies in quantum gravity.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Calmet%2C+Xavier%22">Calmet, Xavier</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> x.calmet@sussex.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Sebastianutti%2C+Marco%22">Sebastianutti, Marco</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> m.sebastianutti@sussex.ac.uk</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22European+Physical+Journal+C+--+Particles+%26+Fields%22">European Physical Journal C -- Particles & Fields</searchLink>. May2026, Vol. 86 Issue 5, p1-8. 8p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Quantum+gravity%22">Quantum gravity</searchLink><br /><searchLink fieldCode="DE" term="%22Stellar+structure%22">Stellar structure</searchLink><br /><searchLink fieldCode="DE" term="%22Stellar+mass%22">Stellar mass</searchLink><br /><searchLink fieldCode="DE" term="%22Density+of+stars%22">Density of stars</searchLink><br /><searchLink fieldCode="DE" term="%22General+relativity+%28Physics%29%22">General relativity (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+perturbations%22">Quantum perturbations</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: We discuss how to model the surface of celestial bodies (such as stars) in quantum gravity to ensure the regularity of quantum corrections to classical solutions of general relativity at the surface of such bodies. Specifically, we use the Vilkovisky–DeWitt unique effective action to calculate universal quantum corrections to the exterior metric for a class of stellar models. Previous descriptions, obtained via a Heaviside density profile, are "pathological" at the surface of the star due to the divergence of the metric functions and associated curvature invariants. Introducing a modified version of the Tolman VII density profile, we determine the minimal degree of differentiability required for this function to generate regular quantum corrections at the star's surface. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of European Physical Journal C -- Particles & Fields 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=194633874
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1140/epjc/s10052-026-15691-3
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 8
        StartPage: 1
    Subjects:
      – SubjectFull: Quantum gravity
        Type: general
      – SubjectFull: Stellar structure
        Type: general
      – SubjectFull: Stellar mass
        Type: general
      – SubjectFull: Density of stars
        Type: general
      – SubjectFull: General relativity (Physics)
        Type: general
      – SubjectFull: Quantum perturbations
        Type: general
    Titles:
      – TitleFull: On modelling the surfaces of celestial bodies in quantum gravity.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Calmet, Xavier
      – PersonEntity:
          Name:
            NameFull: Sebastianutti, Marco
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 14346044
          Numbering:
            – Type: volume
              Value: 86
            – Type: issue
              Value: 5
          Titles:
            – TitleFull: European Physical Journal C -- Particles & Fields
              Type: main
ResultId 1