Publications (61)
Analytical perturbations of relativistic images in Kerr space-time
Fabio Aratore, Valerio Bozza
Light rays passing very close to black holes may wind several times before escaping. For any given electromagnetic source around the black hole, a distant observer would thus obser…
Strong deflection of massive particles in spherically symmetric spacetimes
Fabiano Feleppa, Valerio Bozza, Oleg Yu. Tsupko
Near a gravitating compact object, massive particles traveling along timelike geodesics are gravitationally deflected similarly to light. In this paper, we study the deflection ang…
KELT-22Ab: A Massive Hot Jupiter Transiting a Near Solar Twin
Jonathan Labadie-Bartz, Joseph E. Rodriguez, Keivan G. Stassun +58
We present the discovery of KELT-22Ab, a hot Jupiter from the KELT-South survey. KELT-22Ab transits the moderately bright () Sun-like G2V star TYC 7518-468-1. The plane…
OGLE-2013-BLG-0911Lb: A Secondary on the Brown-Dwarf Planet Boundary around an M-dwarf
Shota Miyazaki, Takahiro Sumi, David P. Bennett +92
We present the analysis of the binary-lens microlensing event OGLE-2013-BLG-0911. The best-fit solutions indicate the binary mass ratio of q~0.03 which differs from that reported i…
Spitzer Microlensing parallax reveals two isolated stars in the Galactic bulge
Weicheng Zang, Yossi Shvartzvald, Tianshu Wang +90
We report the mass and distance measurements of two single-lens events from the 2017 Spitzer microlensing campaign. The ground-based observations yield the detection of finite-sour…
O(d,d)-invariant collapse/inflation from colliding superstring waves
Valerio Bozza, Gabriele Veneziano
Generalizing previous work, we study the collision of massless superstring plane waves in D space-time dimensions within an explicitly O(D-2,D-2)-invariant set of field equations.…