Nota de FísicaPublicado
Nonlinear electrodynamics and the surface redshift of pulsars
Herman J. Mosquera Cuesta; J. M. Salim
2003
Dados da publicação
- Autores
- Herman J. Mosquera Cuesta; J. M. Salim
- Tipo
- Nota de Física
- Status
- Publicado
- Data de publicação
- 2003
- Descrição
- Currently is argued that the best method of determining the neutron star (NS) fundamental properties is by measuring the {\it gravitational redshift} ($z$) of spectral lines produced in the star photosphere. Measurement of $z$ at the star surface provides a unique insight on the NS mass-to-radius relation and thus on its equation of state (EoS), which reflects the physics of the strong interaction between particles making up the star. Evidence for such a measurement has been provided quite recently by Cottam, Paerels \& Mendez (2002), and also by Sanwal et {\it al.} (2002). Here we argue that although the quoted observations are undisputed for canonical pulsars, they could be misidentified if the NS is endowed with a super strong $B$ as in the so-called magnetars (Duncan \& Thompson 1992) and strange quark magnetars (Zhang 2002), as in the spectral line discovered by Ibrahim et {\it al.} (2002;2003). The source of this new ``confusion" redshift is related to nonlinear electrodynamics (NLEDs) effects.
- Ano
- 2003
- Número
- CBPF-NF-026/03
- Vínculo com tese
- Não
- Vínculo com bolsa
- Não