Results 51 to 60 of about 50,454 (258)

Gauge-Invariant Perturbation Theory on the Schwarzschild Background Spacetime Part II: Even-Mode Perturbations

Universe
This is the Part II paper of our series of papers on a gauge-invariant perturbation theory on the Schwarzschild background spacetime. After reviewing our general framework of the gauge-invariant perturbation theory and the proposal of gauge-invariant ...
Kouji Nakamura
doaj   +1 more source

A gravitational wave detector operating beyond the quantum shot-noise limit: Squeezed light in application

EPJ Web of Conferences, 2013
This contribution reviews our recent progress on the generation of squeezed light [1], and also the recent squeezed-light enhancement of the gravitational wave detector GEO 600 [2].
Schnabel Roman
doaj   +1 more source

The Advanced LIGO Photon Calibrators [PDF]

, 2016
The two interferometers of the Laser Interferometry Gravitaional-wave Observatory (LIGO) recently detected gravitational waves from the mergers of binary black hole systems.
A. J. Weinstein, A. Sottile, Abbott B. P., B. P. Abbott, C. Cahillane, C. Conley, D. Tuyenbayev, E. Goetz, E. H. Anders, G. Mendell, H. P. Daveloza, J. Berliner, J. Betzwieser, J. R. Gleason, J. S. Kissel, K. Izumi, L. Canete, M. Rodruck, M. Wade, M. West, N. De Lillo, P. B. Schwinberg, R. L. Savage, S. Kandhasamy, S. Karki, S. Sachdev, T. D. Abbott, T. Sadecki, Tuyenbayev D., V. Quetschke   +29 more
core   +4 more sources

Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events

Astronomische Nachrichten, EarlyView.
ABSTRACT Extragalactic nuclear transients that exhibit repeating outbursts can be modeled as the repeated dynamical interaction between bound stars and supermassive black holes (SMBHs). A subset of these transients, with recurrence timescales of months‐to‐years, have been explained as accretion flares from the repeated tidal stripping of a star by an ...
Ananya Bandopadhyay, Eric R. Coughlin, Julia Fancher, C. J. Nixon, Dheeraj R. Pasham   +4 more
wiley   +1 more source

Coalescence of Kerr Black Holes—Binary Systems from GW150914 to GW170814

Entropy, 2019
We investigate the energy of the gravitational wave from a binary black hole merger by the coalescence of two Kerr black holes with an orbital angular momentum.
Bogeun Gwak
doaj   +1 more source

Prospects for determination of thermal history after inflation with future gravitational wave detectors [PDF]

, 2011
Thermal history of the Universe between inflation and big-bang nucleosynthesis has not yet been revealed observationally. It will be probed by the detection of primordial gravitational waves generated during inflation, which contain information on the ...
Kuroyanagi, Sachiko, Nakayama, Kazunori, Saito, Shun   +2 more
core   +3 more sources

Linear Toroidal‐Inertial Waves on A Differentially Rotating Sphere with Application to Helioseismology: Modeling, Forward and Inverse Problems

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT This paper develops a mathematical framework for interpreting observations of solar inertial waves in an idealized setting. Under the assumption of purely toroidal linear waves on the sphere, the stream function of the flow satisfies a fourth‐order scalar equation.
Tram Thi Ngoc Nguyen, Damien Fournier, Laurent Gizon, Thorsten Hohage   +3 more
wiley   +1 more source

The NANOGrav 15 yr Data Set: Evidence for a Gravitational-wave Background

The Astrophysical Journal Letters, 2023
We report multiple lines of evidence for a stochastic signal that is correlated among 67 pulsars from the 15 yr pulsar timing data set collected by the North American Nanohertz Observatory for Gravitational Waves.
Gabriella Agazie, Akash Anumarlapudi, Anne M. Archibald, Zaven Arzoumanian, Paul T. Baker, Bence Bécsy, Laura Blecha, Adam Brazier, Paul R. Brook, Sarah Burke-Spolaor, Rand Burnette, Robin Case, Maria Charisi, Shami Chatterjee, Katerina Chatziioannou, Belinda D. Cheeseboro, Siyuan Chen, Tyler Cohen, James M. Cordes, Neil J. Cornish, Fronefield Crawford, H. Thankful Cromartie, Kathryn Crowter, Curt J. Cutler, Megan E. DeCesar, Dallas DeGan, Paul B. Demorest, Heling Deng, Timothy Dolch, Brendan Drachler, Justin A. Ellis, Elizabeth C. Ferrara, William Fiore, Emmanuel Fonseca, Gabriel E. Freedman, Nate Garver-Daniels, Peter A. Gentile, Kyle A. Gersbach, Joseph Glaser, Deborah C. Good, Kayhan Gültekin, Jeffrey S. Hazboun, Sophie Hourihane, Kristina Islo, Ross J. Jennings, Aaron D. Johnson, Megan L. Jones, Andrew R. Kaiser, David L. Kaplan, Luke Zoltan Kelley, Matthew Kerr, Joey S. Key, Tonia C. Klein, Nima Laal, Michael T. Lam, William G. Lamb, T. Joseph W. Lazio, Natalia Lewandowska, Tyson B. Littenberg, Tingting Liu, Andrea Lommen, Duncan R. Lorimer, Jing Luo, Ryan S. Lynch, Chung-Pei Ma, Dustin R. Madison, Margaret A. Mattson, Alexander McEwen, James W. McKee, Maura A. McLaughlin, Natasha McMann, Bradley W. Meyers, Patrick M. Meyers, Chiara M. F. Mingarelli, Andrea Mitridate, Priyamvada Natarajan, Cherry Ng, David J. Nice, Stella Koch Ocker, Ken D. Olum, Timothy T. Pennucci, Benetge B. P. Perera, Polina Petrov, Nihan S. Pol, Henri A. Radovan, Scott M. Ransom, Paul S. Ray, Joseph D. Romano, Shashwat C. Sardesai, Ann Schmiedekamp, Carl Schmiedekamp, Kai Schmitz, Levi Schult, Brent J. Shapiro-Albert, Xavier Siemens, Joseph Simon, Magdalena S. Siwek, Ingrid H. Stairs, Daniel R. Stinebring, Kevin Stovall, Jerry P. Sun, Abhimanyu Susobhanan, Joseph K. Swiggum, Jacob Taylor, Stephen R. Taylor, Jacob E. Turner, Caner Unal, Michele Vallisneri, Rutger van Haasteren, Sarah J. Vigeland, Haley M. Wahl, Qiaohong Wang, Caitlin A. Witt, Olivia Young, The NANOGrav Collaboration   +114 more
doaj   +1 more source

Can the Gravitational Wave Background from Inflation be Detected Locally?

, 1993
The Cosmic Background Explorer (COBE) detection of microwave background anisotropies may contain a component due to gravitational waves generated by inflation.
A. D. Linde, A. D. Linde, A. D. Linde, A. D. Linde, A. H. Guth, A. R. Liddle, A. R. Liddle, A. R. Liddle, Andrew R. Liddle, B. Allen, D. La, D. S. Salopek, D. S. Salopek, E. W. Kolb, F. Lucchin, F. Lucchin, G. F. Smoot, J. D. Barrow, J. E. Lidsey, J. E. Lidsey, K. Freese, K. S. Thorne, L. F. Abbott, L. M. Krauss, L. P. Grishchuk, M. S. Turner, M. White, N. Christensen, R. Crittenden, R. L. Davis, R. L. Davis, T. Souradeep, V. Sahni   +32 more
core   +2 more sources

On detection of the stochastic gravitational-wave background using the Parkes pulsar timing array [PDF]

, 2011
We search for the signature of an isotropic stochastic gravitational-wave background in pulsar timing observations using a frequency-domain correlation technique.
A. W. Hotan, Anholm, Bailes, Blandford, Champion, Coles, Cox, D. J. Champion, D. R. B. Yardley, Damour, Detweiler, Edwards, F. A. Jenet, Folkner, G. B. Hobbs, Hellings, Hellings, Hobbs, Hobbs, Hobbs, Hobbs, Hotan, J. E. Reynolds, J. M. Sarkissian, J. P. W. Verbiest, Jaffe, Jenet, Jenet, Kaspi, Lee, Lommen, Lorimer, M. Bailes, Maggiore, N. D. R. Bhat, Petit, Petit, R. N. Manchester, Romani, S. Burke-Spolaor, S. Oslowski, Sazhin, Scargle, Sesana, Sesana, Shannon, Standish, Taylor, Taylor, Thorsett, van Haasteren, van Haasteren, van Straten, van Straten, Verbiest, Verbiest, Verbiest, W. A. Coles, W. van Straten, Wyithe, Yardley, You, Zechmeister   +62 more
core   +3 more sources