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Impact of star formation inhomogeneities on merger rates and interpretation of LIGO results
R. O'Shaughnessy, R. Kopparapu, K. Belczynski
Within the next decade, ground based gravitational wave detectors are in principle capable of determining the compact object merger rate per unit volume of the local universe to be…
Search for Gravitational Wave Bursts from Soft Gamma Repeaters
LIGO Scientific Collaboration, S. Barthelmy, N. Gehrels +2
We present the results of a LIGO search for short-duration gravitational waves (GWs) associated with Soft Gamma Repeater (SGR) bursts. This is the first search sensitive to neutron…
Beating the spin-down limit on gravitational wave emission from the Crab pulsar
The LIGO Scientific Collaboration, B. Abbott, R. Abbott +440
We present direct upper limits on gravitational wave emission from the Crab pulsar using data from the first nine months of the fifth science run of the Laser Interferometer Gravit…
The Total Merger Rate of Compact Object Binaries In The Local Universe
Aleksander Sadowski, Krzysztof Belczynski, Tomasz Bulik +3
Using a population synthesis approach, we compute the total merger rate in the local Universe for double neutron stars, double black holes, and black hole -- neutron star binaries.…
Short Gamma-Ray Bursts and Binary Mergers in Spiral and Elliptical Galaxies: Redshift Distribution and Hosts
R. O'Shaughnessy, V. Kalogera, K. Belczynski
To test whether the short GRB rates, redshift distribution and host galaxies are consistent with current theoretical predictions, we use avery large database of population synthesi…
Host Galaxies Catalog Used in LIGO Searches for Compact Binary Coalescence Events
Ravi Kumar Kopparapu, Chad R. Hanna, Vicky Kalogera +4
An up-to-date catalog of nearby galaxies considered as hosts of binary compact objects is provided with complete information about sky position, distance, extinction-corrected blue…
Dynamical Interactions and the Black Hole Merger Rate of the Universe
Ryan O'Leary, Richard O'Shaughnessy, Frederic Rasio
Binary black holes can form efficiently in dense young stellar clusters, such as the progenitors of globular clusters, via a combination of gravitational segregation and cluster ev…
Formation of Double Compact Objects
V. Kalogera, K. Belczynski, C. Kim +2
Current observations of double neutron stars provide us with a wealth of information that we can use to investigate their evolutionary history and the physical conditions of neutro…
Constraining population synthesis models via empirical binary compact object merger and supernovae rates
R. O'Shaughnessy, C. Kim, V. Kalogera +1
The observed samples of supernovae (SN) and double compact objects (DCOs) provide several critical constraints on population-synthesis models: the parameters of these models must b…
Mapping population synthesis event rates on model parameters II: Convergence and accuracy of multidimensional fits
R. O'Shaughnessy, V. Kalogera, K. Belczynski
Binary population synthesis calculations and associated predictions, especially event rates, are known to depend on a significant number of input model parameters with different de…
Binary Mergers and Growth of Black Holes in Dense Star Clusters
Ryan M. O'Leary, Frederic A. Rasio, John M. Fregeau +2
We model the dynamical evolution of primordial black holes (BHs) in dense star clusters using a simplified treatment of stellar dynamics in which the BHs are assumed to remain conc…
Upper Limits on a Stochastic Background of Gravitational Waves
LIGO Scientific Collaboration, B. Abbott
The Laser Interferometer Gravitational Wave Observatory (LIGO) has performed a third science run with much improved sensitivities of all three interferometers. We present an analys…
Constraining population synthesis models via the binary neutron star population
R. O'Shaughnessy, C. Kim, T. Frakgos +2
The observed sample of double neutron-star (NS-NS) binaries presents a challenge to population-synthesis models of compact object formation: the parameters entering into these mode…
Bounds on Expected Black Hole Spins in Inspiraling Binaries
R. O'Shaughnessy, J. Kaplan, V. Kalogera +1
As a first step towards understanding the angular momentum evolution history of black holes in merging black-hole/neutron-star binaries, we perform population synthesis calculation…
Mapping inspiral rates on population synthesis parameters
R. O'Shaughnessy, V. Kalogera, K. Belczynski
Formation rates of compact-object binaries are often derived from population synthesis calculations. However, such calculations depend sensitively on a relatively large number of m…