Erratum: “Neutron stars for undergraduates” [Am. J. Phys. 72 (7), 892–905 (2004)]

Neutron stars structure in the context of massive gravity

“…Historically speaking, the first HEE equation for GR was introduced and employed by Tolman, Oppenheimer and Volkoff (TOV) [43][44][45]. After that, a series of studies were dedicated to obtain HEE of neutron star [46][47][48][49][50][51][52][53]. In addition, the compact objects and their TOV equations were investigated in the presence of different modified gravities such as; gravity's rainbow [54], vector-tensor-Horndeski theory of gravity [55], dilaton gravity [56], F (R) and F (G) gravities [57][58][59][60][61] (see [62][63][64][65][66][67][68][69][70][71][72][73][74][75][76][77][78][79][80][81] for more details).…”

Dilatonic equation of hydrostatic equilibrium and neutron star structure

“…Also, the physical characteristics of stars using TOV equation have been investigated in Refs. (Silbar 2004;Narain 2006;Bordbar 2006a;Bordbar 2006b;Li 2012;Yazdizadeh 2013;Oliveira 2014). On the other hand, if one is interested in studying the structure and evolution of stars in different gravities, one should obtain the HEE in those gravity models.…”

The shift in the optical band-gap of cadmium oxide as chemical potential minus optical potential

“…(2) arises from the original expression namely V = 2 2 bn/m where m stands for neutron rest-mass. This last expression corresponds, in reality, to a pseudo-potential energy relative to neutron-nucleus interaction [20][21][22][23][24][25][26][27][28][29], V and n being functions of spatial coordinates; generalizing, m is fermion rest-mass. Since b < 0, then V < 0; let us assume that the integral of V over its spatial domain is finite.…”

“…In this treatment, the concept of optical potential arises. This concept, coming from the many-body problem, is really very significant in several branches of Physics [20][21][22][23][24][25][26][27][28][29] as, for instance, nuclear astrophysics, Bose condensation, superfluidity, and superconductivity, but not much has been done upon it. In particular, the notion of optical potential is manifestly relevant in Condensed Matter Physics (consider, for example, superconductivity in solids).…”