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We implement a test of MOND and Verlinde's Emergent Gravity using the galaxycluster SMACS J0723-7327, which has been recently imaged using the eROSITAX-ray telescope as well as with JWST. We test MOND using two independentmethods. The first method involves comparing the dynamical MOND mass andbaryonic mass, while the second method entails a comparison of theMOND-estimated temperature with the observed temperature. We then compare theunseen mass predicted by Emergent Gravity with the estimated dark matter mass.We find that MOND is able to explain the mass discrepancy at large radii butnot in the central regions. The observed temperature profile is also in slightdisagreement with that in the MOND paradigm. Likewise the Emergent GravityTheory shows a marginal discrepancy in accurately accounting for the dynamicalmass in the inner regions. Our results are qualitatively consistent with theearlier tests on other clusters.

A test of MOND and Emergent Gravity with SMACS J0723.3-7327 using eROSITA observations