73 citations · 95 across the 3 of their papers we have counts for
3 papers
Relativistic stars in a cubic Galileon Universe
Hiromu Ogawa, Tsutomu Kobayashi, Kazuya Koyama
We study relativistic stars in Hordenski theories that evade the gravitational wave constraints and exhibit the Vainshtein mechanism, focusing on a model based on the cubic Galileo…
Anti-screening of the Galileon force around a disk center hole
Hiromu Ogawa, Takashi Hiramatsu, Tsutomu Kobayashi
The Vainshtein mechanism is known as an efficient way of screening the fifth force around a matter source in modified gravity. This has been verified mainly in highly symmetric mat…
Instability of hairy black holes in shift-symmetric Horndeski theories
Hiromu Ogawa, Tsutomu Kobayashi, Teruaki Suyama
Recently it was pointed out that in shift-symmetric scalar-tensor theories a black hole can have nontrivial scalar hair which depends linearly on time. We develop black hole pertur…