https://doi.org/10.1140/epjp/s13360-020-00963-y
Regular Article
Cosmic voids and induced hyperbolicity
1
Center for Cosmology and Astrophysics, Alikhanian National Laboratory and Yerevan State University, Yerevan, Armenia
2
School of Physics and Astronomy, Monash University, Clayton, Australia
3
SIA, Sapienza Universita di Roma, Rome, Italy
Received:
2
November
2020
Accepted:
23
November
2020
Published online:
1
December
2020
Cosmic voids—the low density regions in the Universe—as characteristic features of the large-scale matter distribution, are known for their hyperbolic properties. The latter implies the deviation of photon beams due to their underdensity, thus mimicing the negative curvature. We now show that the hyperbolicity can be induced not only by negative curvature or underdensity but also depends on the anisotropy of the photon beams.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021
