Effect of peak absolute magnitude of Type Ia supernovae and sound horizon values on the Hubble constant using DESI Data Release 1 results
Abstract We apply data-motivated priors on the peak absolute magnitude of Type Ia supernovae (M) and the sound horizon at the drag epoch ( $$r_d$$ r d ), to study how the $$ M-r_d$$ M - r d degeneracy affects low redshift measurements of the Hubble constant, and then compare these estimates to the P...
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SpringerOpen
2025-04-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-14219-5 |
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| author | Shubham Barua Shantanu Desai |
| author_facet | Shubham Barua Shantanu Desai |
| author_sort | Shubham Barua |
| collection | DOAJ |
| description | Abstract We apply data-motivated priors on the peak absolute magnitude of Type Ia supernovae (M) and the sound horizon at the drag epoch ( $$r_d$$ r d ), to study how the $$ M-r_d$$ M - r d degeneracy affects low redshift measurements of the Hubble constant, and then compare these estimates to the Planck estimated value of the Hubble constant. We use the data from Pantheon $$+$$ + , Cosmic Chronometers, and the Dark Energy Spectroscopic Instrument Data Release 1 (DESI DR1) Baryon Acoustic Oscillations (BAO) results for this purpose. We reaffirm the fact that there is a degeneracy between M and $$r_d$$ r d , and modifying the $$r_d$$ r d values to reconcile the discrepancy in Hubble constant values also requires a change in the peak absolute magnitude M. For certain M and $$r_d$$ r d priors, the discrepancy is found to reduce to be as low as (1.2–2) $$\sigma $$ σ when considering the spatially flat $$\Lambda $$ Λ CDM model. We also notice that for our datasets considered, the Gaussian prior combination of $$M \in \mathcal {N} (-\,19.253,0.027)$$ M ∈ N ( - 19.253 , 0.027 ) (obtained from SH0ES) and $$r_d \in \mathcal {N} (147.05,0.3)$$ r d ∈ N ( 147.05 , 0.3 ) Mpc (determined from Planck CMB measurements) is least favored as compared to other prior combinations for the $$\Lambda $$ Λ CDM model. |
| format | Article |
| id | doaj-art-0b37d2100bf24013b402d4621cd4becd |
| institution | OA Journals |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | SpringerOpen |
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| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-0b37d2100bf24013b402d4621cd4becd2025-08-20T01:47:29ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-04-0185411210.1140/epjc/s10052-025-14219-5Effect of peak absolute magnitude of Type Ia supernovae and sound horizon values on the Hubble constant using DESI Data Release 1 resultsShubham Barua0Shantanu Desai1Department of Physics, IITDepartment of Physics, IITAbstract We apply data-motivated priors on the peak absolute magnitude of Type Ia supernovae (M) and the sound horizon at the drag epoch ( $$r_d$$ r d ), to study how the $$ M-r_d$$ M - r d degeneracy affects low redshift measurements of the Hubble constant, and then compare these estimates to the Planck estimated value of the Hubble constant. We use the data from Pantheon $$+$$ + , Cosmic Chronometers, and the Dark Energy Spectroscopic Instrument Data Release 1 (DESI DR1) Baryon Acoustic Oscillations (BAO) results for this purpose. We reaffirm the fact that there is a degeneracy between M and $$r_d$$ r d , and modifying the $$r_d$$ r d values to reconcile the discrepancy in Hubble constant values also requires a change in the peak absolute magnitude M. For certain M and $$r_d$$ r d priors, the discrepancy is found to reduce to be as low as (1.2–2) $$\sigma $$ σ when considering the spatially flat $$\Lambda $$ Λ CDM model. We also notice that for our datasets considered, the Gaussian prior combination of $$M \in \mathcal {N} (-\,19.253,0.027)$$ M ∈ N ( - 19.253 , 0.027 ) (obtained from SH0ES) and $$r_d \in \mathcal {N} (147.05,0.3)$$ r d ∈ N ( 147.05 , 0.3 ) Mpc (determined from Planck CMB measurements) is least favored as compared to other prior combinations for the $$\Lambda $$ Λ CDM model.https://doi.org/10.1140/epjc/s10052-025-14219-5 |
| spellingShingle | Shubham Barua Shantanu Desai Effect of peak absolute magnitude of Type Ia supernovae and sound horizon values on the Hubble constant using DESI Data Release 1 results European Physical Journal C: Particles and Fields |
| title | Effect of peak absolute magnitude of Type Ia supernovae and sound horizon values on the Hubble constant using DESI Data Release 1 results |
| title_full | Effect of peak absolute magnitude of Type Ia supernovae and sound horizon values on the Hubble constant using DESI Data Release 1 results |
| title_fullStr | Effect of peak absolute magnitude of Type Ia supernovae and sound horizon values on the Hubble constant using DESI Data Release 1 results |
| title_full_unstemmed | Effect of peak absolute magnitude of Type Ia supernovae and sound horizon values on the Hubble constant using DESI Data Release 1 results |
| title_short | Effect of peak absolute magnitude of Type Ia supernovae and sound horizon values on the Hubble constant using DESI Data Release 1 results |
| title_sort | effect of peak absolute magnitude of type ia supernovae and sound horizon values on the hubble constant using desi data release 1 results |
| url | https://doi.org/10.1140/epjc/s10052-025-14219-5 |
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