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We propose a scenario for the formation of the pulsar with two white dwarfs(WDs) triple system PSR J0337+1715. In our scenario a close binary system istidally and frictionally destroyed inside the envelope of a massive star thatlater goes through an accretion induced collapse (AIC) and forms the neutronstar (NS). The proposed scenario includes a new ingredient of a binary systemthat breaks-up inside a common envelope. We use the binary c software tocalculate the post break-up evolution of the system, and show that both lowmass stars end as helium WDs. One of the two lower mass stars that ends furtherout, the tertiary star, transfers mass to the ONeMg WD remnant of the massivestar, and triggers the AIC. The inner low mass main sequence star evolveslater, induces AIC if the tertiary had not done it already, and spins-up the NSto form a millisecond pulsar. This scenario is not extremely sensitive to manyof the parameters, such as the eccentricity of the tertiary star and theorbital separation of the secondary star after the low mass binary systembreaks loose inside the envelope, and to the initial masses of these stars. Theproposed scenario employs an efficient envelope removal by jets launched by thecompact object immersed in the giant envelope, and the newly proposed grazingenvelope evolution.

A formation scenario for the triple pulsar PSR J0337+1715: breaking a binary system inside a common envelope