Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 3, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2021/03/063
Keywords
astrophysical fluid dynamics; gravity; accretion
Funding
- DFG
- COST Actions [CA16104, CA15117]
- Emmy Noether Research Group - DFG [DO 1771/1-1]
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The study investigates the unique features of Polish doughnuts in the space-times of rotating boson stars, showing the possibility of static surfaces for retrograde thick tori with the presence of a static ring. This characteristic is not present in Kerr space-times.
We investigate polish doughnuts with a uniform constant specific angular momentum distribution in the space-times of rotating boson stars. In such space-times thick tori can exhibit unique features not present in Kerr space-times. For instance, in the context of retrograde tori, they may possess two centers connected or not by a cusp. Rotating boson stars also feature a static ring, neither present in Kerr space-times. This static ring consists of static orbits, where particles are at rest with respect to a zero angular momentum observer at infinity. Here we show that the presence of a static ring allows for an associated static surface of a retrograde thick torus, where inside the static surface the fluid moves in prograde direction. We classify the retrograde Polish doughnuts and present several specific examples.
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