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13 papers · 2 filters
Probing evolution of binaries influenced by the spin-orbit resonances
Anuradha Gupta, Achamveedu Gopakumar
We evolve isolated comparable mass spinning compact binaries experiencing Schnittman's post-Newtonian spin-orbit resonances in an inertial frame associated with , the initial…
Spacetime Singularities
Pankaj S. Joshi
We present here an overview of our basic understanding and recent developments on spacetime singularities in the Einstein theory of gravity. Several issues related to physical sign…
Application of a Hough search for continuous gravitational waves on data from the 5th LIGO science run
The LIGO Scientific Collaboration, The Virgo Collaboration, J. Aasi +876
We report on an all-sky search for periodic gravitational waves in the frequency range with the first derivative of frequency in the range $-8.9 \times 10^{-1…
Improving the sensitivity of a search for coalescing binary black holes with non-precessing spins in gravitational wave data
Stephen Privitera, Satyanarayan R. P. Mohapatra, Parameswaran Ajith +6
We demonstrate the implementation of a sensitive search pipeline for gravitational waves from coalescing binary black holes whose components have spins aligned with the orbital ang…
Particle acceleration by Majumdar-Papapetrou di-hole
Mandar Patil, Pankaj S. Joshi
We explore the multi-black hole spacetimes from the perspective of the ultra-high energy particle collisions. Such a discussion is limited to the spacetimes containing a single bla…
Time Delay between Relativistic Images as a probe of Cosmic Censorship
Satyabrata Sahu, Mandar Patil, D. Narasimha +1
We study the time delay between successive relativistic images in gravitational lensing as a possible discriminator between various collapse end states and hence as a probe of cosm…
Constraints on cosmic strings from the LIGO-Virgo gravitational-wave detectors
J. Aasi, J. Abadie, B. P. Abbott +873
Cosmic strings can give rise to a large variety of interesting astrophysical phenomena. Among them, powerful bursts of gravitational waves (GWs) produced by cusps are a promising o…
A directed search for continuous Gravitational Waves from the Galactic Center
The LIGO Scientific Collaboration, The Virgo Collaboration, J. Aasi +871
We present the results of a directed search for continuous gravitational waves from unknown, isolated neutron stars in the Galactic Center region, performed on two years of data fr…
Time-domain inspiral templates for spinning compact binaries in quasi-circular orbits described by their orbital angular momenta
Anuradha Gupta, Achamveedu Gopakumar
We present a prescription to compute the time-domain gravitational wave (GW) polarization states associated with spinning compact binaries inspiraling along quasi-circular orbits.…
Testing the validity of the single-spin approximation in inspiral-merger-ringdown waveforms
Michael Pürrer, Mark Hannam, P. Ajith +1
Gravitational-wave signals from black-hole binaries with non-precessing spins are described by four parameters -- each black hole's mass and spin. It has been shown that the domina…
Distinguishing black holes from naked singularities through their accretion disk properties
Pankaj S. Joshi, Daniele Malafarina, Ramesh Narayan
We show that, in principle, a slowly evolving gravitationally collapsing perfect fluid cloud can asymptotically settle to a static spherically symmetric equilibrium configuration w…
Prospects for Observing and Localizing Gravitational-Wave Transients with Advanced LIGO, Advanced Virgo and KAGRA
The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1319
We present our current best estimate of the plausible observing scenarios for the Advanced LIGO, Advanced Virgo and KAGRA gravitational-wave detectors over the next several years,…
Ultra-high energy collision with neither black hole nor naked singularity
Ken-ichi Nakao, Masashi Kimura, Mandar Patil +1
We explore the collision between two concentric spherical thin shells. The inner shell is charged, whereas the outer one is either neutral or charged. In the situation we consider,…