Comparing thin accretion disk properties of naked singularities and black holes

Understand

In the present paper, we study the thermal properties of the geometrically thin accretion disks surrounding the null naked singularity (NNS) and the first type of Joshi-Malafarina-Narayan (JMN1) spacetimes and compare the results with the accretion disk around equally massive Schwarzschild black hole.

• First, we examine the properties of the circular orbits in these spacetimes.
• The emitted flux, radiation spectra, disk efficiency, and temperature distribution on the disk surface are then investigated.
• The efficiency of the conversion of the accreting matter into radiation is found to be substantially higher for naked singularities than that for black holes.