Abstract
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.
| Original language | English |
|---|---|
| Article number | 104031 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 85 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - May 21 2012 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Nuclear and High Energy Physics
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Circular geodesics and accretion disks in the Janis-Newman-Winicour and gamma metric spacetimes. / Chowdhury, Anirban N.; Patil, Mandar; Malafarina, Daniele; Joshi, Pankaj S.
In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 85, No. 10, 104031, 21.05.2012.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Circular geodesics and accretion disks in the Janis-Newman-Winicour and gamma metric spacetimes
AU - Chowdhury, Anirban N.
AU - Patil, Mandar
AU - Malafarina, Daniele
AU - Joshi, Pankaj S.
PY - 2012/5/21
Y1 - 2012/5/21
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84861691272&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84861691272&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.85.104031
DO - 10.1103/PhysRevD.85.104031
M3 - Article
VL - 85
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
SN - 1550-7998
IS - 10
M1 - 104031
ER -