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The idea of possible modification to gravity theory, whether it is in theNewtonian or general relativistic premises, is there for quite sometime. Basedon it, astrophysical and cosmological problems are targeted to solve. But noneof the Newtonian theories of modification has been performed from the firstprinciple. Here, we modify Poisson's equation and propose two possible ways tomodify the law gravitation which, however, reduces to Newton's law far awayfrom the center of source. Based on these modified Newton's laws, we attempt tosolve problems lying with white dwarfs. There are observational evidences forpossible violation of the Chandrasekhar mass-limit significantly: it could besub- as well as super-Chandrasekhar. We show that modified Newton's law, eitherby modifying LHS or RHS of Poisson's equation, can explain them.

Modified Newtonian Gravity: Explaining observations of sub- and super-Chandrasekhar limiting mass white dwarfs