A Hubble Constant Determination Through Quasar Time Delays and Type Ia Supernovae
Fuente:
arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866917953207795712 |
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| author | Colaço, L. R. |
| author_facet | Colaço, L. R. |
| contents | This paper presents a new model-independent constraint on the Hubble constant ($H_0$) by anchoring relative distances from Type Ia supernovae (SNe Ia) observations to absolute distance measurements from time-delay strong Gravitational Lensing (SGL) systems. The approach only uses the validity of the cosmic distance duality relation (CDDR) to derive constraints on $H_0$. By using Gaussian Process (GP) regression to reconstruct the unanchored luminosity distance from the Pantheon$+$ compilation to match the time-delay angular diameter distance at the redshift of the lenses, one yields a value of $H_0 = 75.57 \pm 4.415$ km/s/Mpc at a 68\% confidence level. The result aligns well with the local estimate from Cepheid variables within the $1σ$ confidence region, indicating consistency with late-universe probes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_06189 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A Hubble Constant Determination Through Quasar Time Delays and Type Ia Supernovae Colaço, L. R. Cosmology and Nongalactic Astrophysics This paper presents a new model-independent constraint on the Hubble constant ($H_0$) by anchoring relative distances from Type Ia supernovae (SNe Ia) observations to absolute distance measurements from time-delay strong Gravitational Lensing (SGL) systems. The approach only uses the validity of the cosmic distance duality relation (CDDR) to derive constraints on $H_0$. By using Gaussian Process (GP) regression to reconstruct the unanchored luminosity distance from the Pantheon$+$ compilation to match the time-delay angular diameter distance at the redshift of the lenses, one yields a value of $H_0 = 75.57 \pm 4.415$ km/s/Mpc at a 68\% confidence level. The result aligns well with the local estimate from Cepheid variables within the $1σ$ confidence region, indicating consistency with late-universe probes. |
| title | A Hubble Constant Determination Through Quasar Time Delays and Type Ia Supernovae |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2503.06189 |