Summary
The Hubble constant (H0) is a crucial cosmological parameter that represents the universe's expansion rate. Different methods, including gamma-ray bursts (GRBs), observational Hubble data (OHD), and strong gravitational lensing (SGL), can be used to constrain H0. A model-independent analysis using the distance sum rule and Bézier interpolation is employed to determine H0.
Highlights
- The Hubble constant (H0) is a fundamental parameter in cosmology.
- Different methods, including GRBs, OHD, and SGL, can be used to constrain H0.
- A model-independent analysis using the distance sum rule and Bézier interpolation is employed.
- The analysis is performed using three Markov Chain Monte Carlo (MCMC) procedures.
- The results show that the inclusion of SGL data significantly affects the bounds on H0.
- The value of H0 is consistent with the local measurement from type Ia supernovae (SNe Ia).
- The Hubble tension is discussed, and the results are compared with Planck Collaboration findings.
Key Insights
- The Hubble constant (H0) is a crucial parameter in cosmology, and its value has significant implications for our understanding of the universe's expansion history and the properties of dark energy.
- The use of GRBs as high-redshift distance indicators can provide valuable insights into the universe's expansion history, particularly when combined with other data sets, such as OHD and SGL.
- The model-independent analysis using the distance sum rule and Bézier interpolation provides a robust method for constraining H0, as it avoids the need for a specific cosmological model.
- The inclusion of SGL data significantly affects the bounds on H0, highlighting the importance of considering multiple data sets when constraining cosmological parameters.
- The results show that the value of H0 is consistent with the local measurement from SNe Ia, which suggests that the Hubble tension may be due to the need for a more nuanced understanding of the universe's expansion history.
- The Hubble tension is a significant issue in modern cosmology, and resolving it will require a better understanding of the universe's expansion history and the properties of dark energy.
- The use of multiple data sets and model-independent analyses, such as the one employed in this study, will be crucial in resolving the Hubble tension and providing a more accurate understanding of the universe's expansion history.
Mindmap
Citation
Luongo, O., & Muccino, M. (2024). Determining $H_0$ from distance sum rule combining gamma-ray bursts with observational Hubble data and strong gravitational lensing (Version 1). arXiv. https://doi.org/10.48550/ARXIV.2412.18493