\begin{document}$ DM_{\rm MW} $\end{document}) and host galaxy (\begin{document}$ DM_{\rm host} $\end{document}). \begin{document}$ DM_{\rm MW} $\end{document} can be estimated using the Milky Way electron models, such as the NE2001 model and YMW16 model. However, \begin{document}$ DM_{\rm host} $\end{document} is hard to model due to limited information on the local environment of the FRBs. In this study, using 17 well-localized FRBs, we search for possible correlations between \begin{document}$DM_{\rm host} $\end{document} and the properties of the host galaxies, such as the redshift, stellar mass, star-formation rate, age of galaxy, offset of the FRB site from the galactic center, and half-light radius. We find no strong correlation between \begin{document}$ DM_{\rm host} $\end{document} and any of the host properties. Assuming that \begin{document}$DM_{\rm host} $\end{document} is a constant for all host galaxies, we constrain the fraction of the baryon mass in the intergalactic medium today to be \begin{document}$ f_{\rm IGM,0}=0.78_{-0.19}^{+0.15} $\end{document}. If we model \begin{document}$ DM_{\rm host} $\end{document} as a log-normal distribution, however, we obtain a larger value, \begin{document}$ f_{\rm IGM,0}= 0.83_{-0.17}^{+0.12} $\end{document}. Based on the limited number of FRBs, no strong evidence for a redshift evolution of \begin{document}$ f_{\rm IGM} $\end{document} is found."> Search for correlations between host properties and <i>DM</i><sub>host</sub> of fast radio bursts: constraints on the baryon mass fraction in IGM -
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