Circular geodesics and accretion disks in the Janis-Newman-Winicour and gamma metric spacetimes
Anirban ChowdhuryTata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, IndiaMandar PatilTata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, IndiaDaniele MalafarinaTata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, IndiaPankaj S. JoshiTata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
2012en
ABI
Annotatsiya
We study here circular timelike geodesics in the Janis-Newman-Winicour and Gamma metric spacetimes which contain a strong curvature naked singularity and reduce to the Schwarzschild metric for a specific value of one of the parameters. We show that for both the metrics the range of allowed parameters can be divided into three regimes where structure of the circular geodesics is qualitatively different. It follows that the properties of the accretion disks around such naked singularities can be significantly different from those of disks around black holes. This adds to previous studies showing that if naked singularities exist in nature, their observational signature would be significantly different from that of the black hole.
Identifikatorlar
Iqtiboslar va manbalar
24 ta iqtibos0 ta foydalanilgan manba
Koʻrsatkichlar — AkademScholar · Tez orada