arXiv subjects

Y. -S. Song

Publications and source records attributed to Y. -S. Song.

2 recordsLinked to original sources

arXiv2005

Two Windows on Acceleration and Gravitation: Dark Energy or New Gravity?

Small distortions in the observed shapes of distant galaxies, a cosmic shear due to gravitational lensing, can be used to simultaneously determine the distance-redshift relation, r(z), and the density contrast growth factor, g(z). Both of these functions are sensitive probes of the acceleration. Their simultaneous determination allows for a consistency test and provides sensitivity to physics beyond the standard dark energy paradigm.

astro-ph↗

arXiv1994

Hawking Radiation of Dirac Fields in the (2+1)-Dimensional Black Hole space-time

By calculating the response function, we study the Hawking radiation of massless Dirac fields in the (2+1)-dimensional black hole geometry. We find that the response function has Planck distributions, with the temperature that agrees with the previous results obtained for the scalar field cases. We also find the Green's functions in (2+1)-dimensional Einstein static universe and anti de-Sitter space.

hep-th↗