A Measurement of Hubble Constant Using Cosmographic Approach from Fast Radio Bursts and SNe Ia

Understand

The Hubble constant ${H}_0$ is a crucial parameter in cosmology.

• However, different cosmic observations have resulted in varying posterior results for ${H}_0$, leading to what is known as the ${H}_0$ tension.
• In order to address this issue, it is beneficial to use other dataset to constrain ${H}_0$.
• In this paper, via the cosmographic approach based on the Friedman-Lemaitre-Robertson-Walker (FLRW) metric to the dispersion measure of the intergalactic medium ${\rm{DM}}_{\rm{IGM}}(z)$ of Fast Radio Bursts (FRBs), we obtain the Taylor expansion of $\langle{\rm{DM}}_{\rm{IGM}}(z)\rangle$ in terms redshift $z$.