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1.
The second data release from the European Pulsar Timing Array - IV. Implications for massive black holes, dark matter, and the early Universe / EPTA Collaboration
The European Pulsar Timing Array (EPTA) and Indian Pulsar Timing Array (InPTA) collaborations have measured a low-frequency common signal in the combination of their second and first data releases respectively, with the correlation properties of a gravitational wave background (GWB). Such signal may have its origin in a number of physical processes including a cosmic population of inspiralling supermassive black hole binaries (SMBHBs); inflation, phase transitions, cosmic strings and tensor mode generation by non-linear evolution of scalar perturbations in the early Universe; oscillations of the Galactic potential in the presence of ultra-light dark matter (ULDM). [...]
arXiv:2306.16227.- 2024-05-01 - 30 p. - Published in : Astron. Astrophys. 685 (2024) A94 Fulltext: document - PDF; 2306.16227 - PDF;
2.
Tests of General Relativity with GWTC-3 / LIGO Scientific Collaboration
The ever-increasing number of detections of gravitational waves (GWs) from compact binaries by the Advanced LIGO and Advanced Virgo detectors allows us to perform ever-more sensitive tests of general relativity (GR) in the dynamical and strong-field regime of gravity. [...]
arXiv:2112.06861 ; LIGO-P2100275.
- 41 p.
Fulltext
3.
Search for Subsolar-Mass Binaries in the First Half of Advanced LIGO’s and Advanced Virgo’s Third Observing Run / LIGO Scientific Collaboration
We report on a search for compact binary coalescences where at least one binary component has a mass between 0.2 $M_\odot$ and 1.0 $M_\odot$ in Advanced LIGO and Advanced Virgo data collected between 1 April 2019 1500 UTC and 1 October 2019 1500 UTC. We extend previous analyses in two main ways: we include data from the Virgo detector and we allow for more unequal mass systems, with mass ratio $q \geq 0.1$. [...]
arXiv:2109.12197; LIGO-P2100163-v8.- 2022-08-05 - 16 p. - Published in : Phys. Rev. Lett. 129 (2022) 061104 Fulltext: PDF;
4.
First joint observation by the underground gravitational-wave detector KAGRA with GEO 600 / KAGRA Collaboration
We report the results of the first joint observation of the KAGRA detector with GEO600. KAGRA is a cryogenic and underground gravitational-wave detector consisting of a laser interferometer with three-kilometer arms, and located in Kamioka, Gifu, Japan. [...]
arXiv:2203.01270; LIGO-P2100286.- 2022-06-14 - 37 p. - Published in : PTEP 2022 (2022) 063F01 Fulltext: 2203.01270 - PDF; document - PDF;
5.
The International Pulsar Timing Array second data release: Search for an isotropic Gravitational Wave Background / Antoniadis, J. (FORTH, Heraklion ; Bonn, Max Planck Inst., Radioastron. ; Argelander Inst. Astron.) ; Arzoumanian, Z. (NASA, Goddard) ; Babak, S. (APC, Paris) ; Bailes, M. (Swinburne U. Tech., Hawthorn ; ARC, CoEPP, Australia) ; Nielsen, A.-S. Bak (Bonn, Max Planck Inst., Radioastron. ; Bielefeld U.) ; Baker, P.T. (Widener U.) ; Bassa, C.G. (ASTRON, Dwingeloo) ; Becsy, B. (Montana State U.) ; Berthereau, A. (LPC2E, Orleans ; Station Radioastronomy, Nancay) ; Bonetti, M. (Milan Bicocca U. ; INFN, Milan Bicocca) et al.
We searched for an isotropic stochastic gravitational wave background in the second data release of the International Pulsar Timing Array, a global collaboration synthesizing decadal-length pulsar-timing campaigns in North America, Europe, and Australia. In our reference search for a power law strain spectrum of the form $h_c = A(f/1\,\mathrm{yr}^{-1})^{\alpha}$, we found strong evidence for a spectrally-similar low-frequency stochastic process of amplitude $A = 3.8^{+6.3}_{-2.5}\times10^{-15}$ and spectral index $\alpha = -0.5 \pm 0.5$, where the uncertainties represent 95% credible regions, using information from the auto- and cross-correlation terms between the pulsars in the array. [...]
arXiv:2201.03980.- 2022-01-27 - 15 p. - Published in : Mon. Not. R. Astron. Soc. 510 (2022) 4873 Fulltext: PDF;
6.
Event rate estimates for LISA extreme mass ratio capture sources / Gair, J R (Caltech) ; Barack, L (Texas U., Brownsville, CGWA) ; Creighton, T (LIGO Lab., Caltech) ; Cutler, C (Hannover, Max Planck Inst. Grav.) ; Larson, S L (Caltech, SRL) ; Phinney, E S (Caltech) ; Vallisneri, M (Caltech, JPL)
One of the most exciting prospects for the LISA gravitational wave observatory is the detection of gravitational radiation from the inspiral of a compact object into a supermassive black hole. The large inspiral parameter space and low amplitude of the signal makes detection of these sources computationally challenging. [...]
gr-qc/0405137.- 2004 - 11 p. - Published in : Class. Quantum Gravity 21 (2004) S1595-S1606 Access to fulltext document: PDF; External link: gr-qc/0405137 PDF
In : 8th Gravitational Wave Data Analysis Workshop, Milwaukee, MI, USA, 17 - 20 Dec 2003, pp.S1595-S1606

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