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The discovery of the existence of an upper bound on the mass of a white dwarfstar is considered as one of the finest of twentieth century astrophysics. Onapproaching this limiting mass of $1.4M_\odot$, known as the Chandrasekharmass-limit, a white dwarf is believed to spark of with an explosion called typeIa supernova, which is considered to be a standard candle. But since the lastdecade, observations of several over-luminous, peculiar type Ia supernovaeindicate that the Chandrasekhar-limit be significantly larger. By postulatingnoncommutativity between the components of momentum variables, we show that themass of white dwarfs can be enhanced significantly and arrive at a newsuper-Chandrasekhar mass limit of about $4.68M_\odot$. This can provide aplausible explanation for the origin of over-luminous peculiar type Iasupernovae.

Effect of dynamical noncommutativity on the limiting mass of white dwarfs