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LISA Definition Study Report
/ Colpi, Monica (INFN, Milan Bicocca) ; Danzmann, Karsten (Hannover, Max Planck Inst. Grav.) ; Hewitson, Martin (Hannover, Max Planck Inst. Grav.) ; Jetzer, Philippe (U. Zurich (main)) ; Nelemans, Gijs (Nijmegen U., IMAPP) ; Petiteau, Antoine (IRFU, Saclay) ; Shoemaker, David (MIT, MKI) ; Sopuerta, Carlos (ICE, Bellaterra) ; Stebbins, Robin (Colorado U.) ; Tanvir, Nial (Leicester U.) et al.
The Laser Interferometer Space Antenna (LISA) is the first scientific endeavour to detect and study gravitational waves from space. [...]
arXiv:2402.07571.
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155.
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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;
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Stochastic gravitational wave background from stellar origin binary black holes in LISA
/ Babak, Stanislav (APC, Paris) ; Caprini, Chiara (Geneva U., Dept. Theor. Phys. ; CERN) ; Figueroa, Daniel G. (Valencia U., IFIC) ; Karnesis, Nikolaos (Aristotle U., Thessaloniki) ; Marcoccia, Paolo (Stavanger U.) ; Nardini, Germano (Stavanger U.) ; Pieroni, Mauro (CERN) ; Ricciardone, Angelo (Pisa U. ; Padua U.) ; Sesana, Alberto (Milan Bicocca U. ; INFN, Milan Bicocca ; Brera Observ.) ; Torrado, Jesús (Padua U. ; INFN, Padua)
We use the latest constraints on the population of stellar origin binary black holes (SOBBH) from LIGO/Virgo/KAGRA (LVK) observations, to estimate the stochastic gravitational wave background (SGWB) they generate in the frequency band of LISA. We account for the faint and distant binaries, which contribute the most to the SGWB, by extending the merger rate at high redshift assuming it tracks the star formation rate. [...]
arXiv:2304.06368.-
2023-08-14 - 39 p.
- Published in : JCAP 2308 (2023) 034
Fulltext: 2304.06368 - PDF; document - PDF;
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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.
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41 p.
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Observing GW190521-like binary black holes and their environment with LISA
/ Sberna, Laura (Potsdam, Max Planck Inst.) ; Babak, Stanislav (APC, Paris) ; Marsat, Sylvain (L2IT, Toulouse) ; Caputo, Andrea (Tel Aviv U. ; Weizmann Inst.) ; Cusin, Giulia (Geneva U. ; Paris, Inst. Astrophys.) ; Toubiana, Alexandre (Potsdam, Max Planck Inst.) ; Barausse, Enrico (SISSA, Trieste ; INFN, Trieste ; INFM, Trieste ; IFPU, Trieste) ; Caprini, Chiara (Geneva U. ; CERN) ; Dal Canton, Tito (IJCLab, Orsay) ; Sesana, Alberto (Milan Bicocca U. ; INFN, Milan Bicocca) et al.
Binaries of relatively massive black holes like GW190521 have been proposed to form in dense gas environments, such as the disks of Active Galactic Nuclei (AGNs), and they might be associated with transient electromagnetic counterparts. The interactions of this putative environment with the binary could leave a significant imprint at the low gravitational wave frequencies observable with the Laser Interferometer Space Antenna (LISA). [...]
arXiv:2205.08550.-
2022-09-15 - 17 p.
- Published in : Phys. Rev. D 106 (2022) 064056
Fulltext: 2205.08550 - PDF; PhysRevD.106.064056 - PDF;
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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
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Laser Interferometer Space Antenna
/ LISA Collaboration
Following the selection of The Gravitational Universe by ESA, and the successful flight of LISA Pathfinder, the LISA Consortium now proposes a 4 year mission in response to ESA's call for missions for L3. [...]
arXiv:1702.00786.
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2017. - 41 p.
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