Gravitomagnetism and Angular Momenta of Black-holes

نویسنده

  • Marcelo Samuel Berman
چکیده

Abstract We review the energy contents formulae of Kerr-Newman black-holes, where gravitomagnetic energy term comes to play(Berman, 2006; 2006a; 2004). Then, we obtain the angular momenta formulae, which include the gravitomagnetic effect. Three theorems can be enunciated: (1) No black-hole has its energy confined to its interior; (2) Rotating black-holes do not have confined angular momenta; (3) The energy density of a black-hole is not confined to its interior. The difference between our calculation and previous ones by Virbhadra(1990, 1990a, 1990b), and Aguirregabiria et al.(1996), lies in the fact that we include a term responsible for the selfgravitational energy, while the cited authors discarded such effect, which appears in the static black hole energy calculation. (Spanish) Revisamos las formulas del contenido energetico de los hoyos negros de Kerr-Newman, para los cuales la parte de energia gravitomagnetica entra en escena.(Berman,2006;2006a;2004). Despues, obtenemos las formulas de los momentos angulares, incluyendo el efecto gravitomagnetico. Tres teoremas son establecidos: (1) Ningun hoyo negro tiene su energia confinada en su interior; (2) Hoyos negros en rotacion no poseen su momento angular confinado; (3) La densidad de energia de un hoyo negro no esta confinada interiormente. La diferencia entre nuestros resultados y los previos publicados por Virbhadra(1990, 1990a, 1990b), y Aguirregabiria et al.(1996), se depreenden por la ausencia de energia auto-gravitacional en el calculo efectuado por aquellos autores. Esta ausencia se nota directamente en el calculo de la energia de un hoyo negro estático.

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تاریخ انتشار 2006