Globally visible singularity in an astrophysical setup

ABSTRACT The global visibility of a singularity as an end state the gravitational collapse spherically symmetric pressureless cloud is investigated. We show existence non-zero measured set parameters: total mass and initial mean density collapsing cloud, giving rise to physically strong globally visible for fixed velocity function. such indicates that stable under small perturbation in data causing its existence. This true marginally well non-marginally bound cases. possibility presence suitable parameters astrophysical setup then studied: (1) singularities’ requirements at centre M87 galaxy our (SgrA*) be are discussed terms size forming them, presuming singularities formed due collapse. (2) requirement primordial configuration after getting detached from background universe time matter-dominated era just matter-radiation equality, visible, discussed. (3) scenario neutron star reaching critical mass, which achieved by accreting supernova ejecta expelled binary companion core progenitor, considered. primary aim this paper can form setups appropriate circumstances.