James Webb Space Telescope Feed Post

Harvard ADS: A distance measurement of galaxies from JWST using star formation rate-stellar mass relation

Paper abstract: We use the star formation rate-stellar mass relation (SFR - {M_ * }) of galaxies to measure their luminosity distances as well as estimate cosmological parameters. We obtain a sample of 341 high-redshift galaxies at 5 < z < 14, and 51 others at 1.8 < z < 3.5 from the JWST observations, which can be used to investigate the correlation between the star formation rate and stellar mass, and determine their cosmological distance. The relation SFR \propto {\kern 1pt} {({M_ * }/{M_ \odot })^\gamma } can be applied to check the nonlinear correlation between the star formation rate and stellar mass {M_ * } of galaxies and give their distance. On the other hand, it also can be used to test if the SFR - {M_ * } relation depends on the absolute UV magnitude {M_{UV}}, and the data suggest that the SFR is positively correlated with stellar mass, the SFR - {M_ * } relation of the high-redshift galaxies has an absolute magnitude dependence. Finally, we apply a combination of galaxies and Type Ia supernova (SNIa) Pantheon to test the property of dark energy concerning whether or not its density deviates from the constant, and give the statistical results.