10 citations · 22 across the 10 of their papers we have counts for
10 papers
New Universal Relations for Magnetized Neutron Stars
Byon N. Jayawiguna, Siddarth Ajith, Takuya Katagiri +2
Unlike the neutron-star mass--radius relation, which depends sensitively on the internal stellar structure through the equation of state of dense nuclear matter, certain neutron-st…
Higher-Derivative Corrections to Reissner--Nordström Black Holes from Worldline QFT
Siddarth Ajith, Ravisankar Rajagopal, Nur Rifat +2
In this paper we derived the corrections to the Reissner-Nordström black hole when higher-derivative terms (contractions of the Riemann tensor with the Maxwell field strengt…
Spacetime Quasi-normal Mode Oscillations of Anisotropic Neutron Stars
Jihao Yu, Victor Guedes, Shu Yan Lau +2
Neutron star asteroseismology offers a unique opportunity to probe nuclear physics through stellar oscillations. Although the pressure inside of a neutron star is typically assumed…
Gravitational-Wave Constraints on Neutron-Star Pressure Anisotropy via Universal Relations
Victor Guedes, Siddarth Ajith, Shu Yan Lau +1
Neutron stars may exhibit pressure anisotropy arising from various physical mechanisms, such as elasticity, magnetic fields, viscosity, and superfluidity. We compute the tidal defo…
Worldline Formalism, Eikonal Expansion and the Classical Limit of Scattering Amplitudes
Siddarth Ajith, Yuchen Du, Ravisankar Rajagopal +1
We revisit the fundamentals of two different methods for calculating classical observables: the eikonal method, which is a scattering amplitude-based method, and the worldline quan…
Worldline Proof of Eikonal Exponentiation
Yuchen Du, Siddarth Ajith, Ravisankar Rajagopal +1
In this paper, working in the eikonal approximation, we present a proof for the exponentiation of the 2-body eikonal phase to {\it all orders in the eikonal expansion}, for scalar…
Nonradial instabilities in anisotropic neutron stars
Shu Yan Lau, Siddarth Ajith, Victor Guedes +1
Non-radial oscillation modes of a neutron star possess valuable information about its internal structure and nuclear physics. Starting from the quadrupolar order, such modes under…
I-Love-Q in Einstein-aether Theory
Kai Vylet, Siddarth Ajith, Kent Yagi +1
Although Lorentz symmetry is a staple of General Relativity (GR), there are several reasons to believe it may not hold in a more advanced theory of gravity, such as quantum gravity…
I-Love-Q in Hořava-Lifshitz Gravity
Siddarth Ajith, Kent Yagi, Nicolás Yunes
Hořava-Lifshitz gravity is an alternative theory to general relativity which breaks Lorentz invariance in order to achieve an ultraviolet complete and power-counting renormalizable…
Rotating black holes in valid vector-tensor theories after GW170817
Siddarth Ajith, Alexander Saffer, Kent Yagi
Vector-tensor theories beyond General Relativity have widely been studied in the context of ultraviolet completion of gravity, endowing a mass to the graviton and explaining dark e…