Search Results - "Apostolatos, Theocharis A."

Revising the multipole moments of numerical spacetimes and its consequences by Pappas, George, Apostolatos, Theocharis A

“…Identifying the relativistic multipole moments of a spacetime of an astrophysical object that has been constructed numerically is of major interest, both…”
Get full text

How to observe a non-Kerr spacetime using gravitational waves by Apostolatos, Theocharis A, Lukes-Gerakopoulos, Georgios, Contopoulos, George

“…We present a generic criterion which can be used in gravitational-wave data analysis to distinguish an extreme-mass-ratio inspiral into a Kerr background…”
Get full text

Effectively universal behavior of rotating neutron stars in general relativity makes them even simpler than their Newtonian counterparts by Pappas, George, Apostolatos, Theocharis A

“…Recently, it was shown that slowly rotating neutron stars exhibit an interesting correlation between their moment of inertia I, their quadrupole moment Q, and…”
Get full text

An all-purpose metric for the exterior of any kind of rotating neutron star by Pappas, George, Apostolatos, Theocharis A.

“…We have tested the appropriateness of two-soliton analytic metric to describe the exterior of all types of neutron stars, no matter what their equation of…”
Get full text

Why I-Love-Q: Explaining why universality emerges in compact objects by Yagi, Kent, Stein, Leo C., Pappas, George, Yunes, Nicolás, Apostolatos, Theocharis A.

“…Black holes are said to have no hair because all of their multipole moments can be expressed in terms of just their mass, charge and spin angular momentum. We…”
Get full text

Non-linear pulsations in differentially rotating neutron stars: mass-shedding-induced damping and splitting of the fundamental mode by Stergioulas, Nikolaos, Apostolatos, Theocharis A., Font, José A.

“…We study small-amplitude, non-linear pulsations of uniformly and differentially rotating neutron stars employing a two-dimensional evolution code for…”
Get full text

Effective no-hair relations for neutron stars and quark stars: Relativistic results by Yagi, Kent, Kyutoku, Koutarou, Pappas, George, Yunes, Nicolás, Apostolatos, Theocharis A.

“…We here investigate the possible existence of no-hair-like relations among multipole moments for neutron stars and quark stars that are independent of their…”
Get full text

Construction of a template family for the detection of gravitational waves from coalescing binaries by Apostolatos, TA

Get full text

The last three minutes - Issues in gravitational-wave measurements of coalescing compact binaries by Cutler, Curt, Apostolatos, Theocharis A., Bildsten, Lars, Finn, Lee S., Flanagan, Eanna E., Kennefick, Daniel, Markovic, Dragoljub M., Ori, Amos, Poisson, Eric, Sussman, Gerald J.

“…Gravitational-wave interferometers are expected to monitor the last three minutes of inspiral and final coalescence of neutron star and black hole binaries at…”
Get full text

Hodograph: A useful geometrical tool for solving some difficult problems in dynamics by Apostolatos, Theocharis A.

“…The hodograph is very useful for solving complicated problems in dynamics. By simple geometrical arguments students can directly obtain the answer to problems…”
Get full text

Search templates for gravitational waves from precessing, inspiraling binaries by Apostolatos, TA

Get full text

Enhanced plateau effect at resonance in realistic non-integrable EMRIs by Eleni, Areti, Apostolatos, Theocharis A

“…When an EMRI in a perturbed integrable gravitational field, such as a deformed Kerr black hole, undergoes a prolonged resonance, the frequencies that engage in…”
Get full text

Spin-induced orbital precession and its modulation of the gravitational waveforms from merging binaries by Apostolatos, TA, Cutler, C, Sussman, GJ, Thorne, KS

Get full text

Resonant excitation of eccentricity in spherical extreme-mass-ratio inspirals by Eleni, Areti, Destounis, Kyriakos, Apostolatos, Theocharis A, Kokkotas, Kostas D

“…Gravitational radiation reaction, has been one of the fundamental issues in general relativity. Over a span of decades, this process has been analyzed in the…”
Get full text

Tracing the geometry around a massive, axisymmetric body to measure, through gravitational waves, its mass moments and electromagnetic moments by Sotiriou, Thomas P., Apostolatos, Theocharis A.

Get full text

Extended bodies with spin induced quadrupoles on circular equatorial orbits in Kerr spacetime by Timogiannis, Iason, Lukes-Gerakopoulos, Georgios, Apostolatos, Theocharis A

“…Physical Review D 108, 084023 (2023) This work discusses the motion of extended test bodies as described by the Mathisson-Papapetrou-Dixon (MPD) equations in…”
Get full text

Spinning test body orbiting around a Kerr black hole: Comparing Spin Supplementary Conditions for Circular Equatorial Orbits by Timogiannis, Iason, Lukes-Gerakopoulos, Georgios, Apostolatos, Theocharis A

“…The worldline of a spinning test body moving in curved spacetime can be provided by the Mathisson-Papapetrou-Dixon (MPD) equations when its centroid, i.e. its…”
Get full text

A Newtonian analogue of Kerr black hole by Eleni, Areti, Apostolatos, Theocharis A

“…Phys. Rev. D 101, 044056 (2020) A 250-year old Newtonian problem, first studied by Euler, turns out to share a lot of similarities with the most extreme…”
Get full text

Spinning test body orbiting around a Schwarzschild black hole: Comparing Spin Supplementary Conditions for Circular Equatorial Orbits by Timogiannis, Iason, Lukes-Gerakopoulos, Georgios, Apostolatos, Theocharis A

“…Phys. Rev. D 104, 024042 (2021) The Mathisson-Papapetrou-Dixon (MPD) equations describe the motion of an extended test body in general relativity. This system…”
Get full text

Non-linear pulsations in differentially rotating neutron stars: mass-shedding-induced damping and splitting of the fundamental mode by Stergioulas, Nikolaos, Apostolatos, Theocharis A., Font, José A.

Get full text