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Science with the space-based interferometer LISA. IV: Probing inflation with gravitational waves
/ Bartolo, Nicola (Padua U. ; INFN, Padua ; Padua Observ.) ; Caprini, Chiara (APC, Paris) ; Domcke, Valerie (APC, Paris) ; Figueroa, Daniel G. (CERN) ; Garcia-Bellido, Juan (Madrid, IFT) ; Guzzetti, Maria Chiara (Padua U. ; INFN, Padua) ; Liguori, Michele (Padua U. ; INFN, Padua ; Padua Observ.) ; Matarrese, Sabino (Padua U. ; INFN, Padua ; Padua Observ. ; GSSI, Aquila) ; Peloso, Marco (Minnesota U.) ; Petiteau, Antoine (APC, Paris) et al.
We investigate the potential for the LISA space-based interferometer to detect the stochastic gravitational wave background produced from different mechanisms during inflation. Focusing on well-motivated scenarios, we study the resulting contributions from particle production during inflation, inflationary spectator fields with varying speed of sound, effective field theories of inflation with specific patterns of symmetry breaking and models leading to the formation of primordial black holes. [...]
arXiv:1610.06481; ACFI-T16-19; UMN-TH-3608-16; CERN-TH-2016-222; KCL-PH-TH-2016-58; IFT-UAM-CSIC-16-104.-
2016-12-14 - 63 p.
- Published in : JCAP 12 (2016) 026
Fulltext: PDF; External link: Preprint
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Gravitational Wave Anisotropies from Primordial Black Holes
/ Bartolo, N. (INFN, Padua ; Padua U.) ; Bertacca, D. (INFN, Padua ; Padua U., Astron. Dept.) ; De Luca, V. (Geneva U., CAP) ; Franciolini, G. (Geneva U., CAP) ; Matarrese, S. (GSSI, Aquila ; INFN, Padua ; Padua U.) ; Peloso, M. (INFN, Padua ; U. Padua, Dept. Phys. Astron.) ; Ricciardone, A. (INFN, Padua ; Stavanger U.) ; Riotto, A. (CERN ; Geneva U., CAP) ; Tasinato, G. (Swansea U.)
An observable stochastic background of gravitational waves is generated whenever primordial black holes are created in the early universe thanks to a small-scale enhancement of the curvature perturbation. We calculate the anisotropies and non-Gaussianity of such stochastic gravitational waves background which receive two contributions, the first at formation time and the second due to propagation effects. [...]
arXiv:1909.12619.-
2020-02-26 - 21 p.
- Published in : JCAP 2002 (2020) 028
Fulltext: PDF;
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From Primordial Black Holes Abundance to Primordial Curvature Power Spectrum (and back)
/ Kalaja, Alba (Padua U., Astron. Dept. ; ICC, Barcelona U. ; U. Groningen, VSI) ; Bellomo, Nicola (ICC, Barcelona U. ; U. Barcelona (main)) ; Bartolo, Nicola (Padua U., Astron. Dept. ; INFN, Padua ; Padua Observ.) ; Bertacca, Daniele (Padua U., Astron. Dept. ; INFN, Padua) ; Matarrese, Sabino (Padua U., Astron. Dept. ; INFN, Padua ; Padua Observ. ; GSSI, Aquila) ; Musco, Ilia (ICC, Barcelona U.) ; Raccanelli, Alvise (ICC, Barcelona U. ; CERN) ; Verde, Licia (ICC, Barcelona U. ; ICREA, Barcelona)
In the model where Primordial Black Holes (PBHs) form from large primordial curvature (C) perturbations, i.e., CPBHs, constraints on PBH abundance provide in principle constraints on the primordial curvature power spectrum. This connection however depends necessarily on the details of PBH formation mechanism. [...]
arXiv:1908.03596.-
2019-10-11 - 52 p.
- Published in : JCAP 1910 (2019) 031
Fulltext: PDF;
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Gravitational wave background from primordial black holes in globular clusters
/ Vanzan, Eleonora (Padua U. ; INFN, Padua) ; Libanore, Sarah (Padua U. ; Ben Gurion U. of Negev) ; Valbusa Dall'Armi, Lorenzo (Padua U. ; INFN, Padua) ; Bellomo, Nicola (Padua U. ; INFN, Padua ; U. Texas, Austin (main) ; Texas U.) ; Raccanelli, Alvise (Padua U. ; INFN, Padua ; Padua Observ. ; CERN)
Primordial black holes still represent a viable candidate for a significant fraction, if not for the totality, of dark matter. If these compact objects have masses of order tens of solar masses, their coalescence can be observed by current and future ground-based gravitational wave detectors. [...]
arXiv:2405.13871.-
2024-10-03 - 44 p.
Fulltext: document - PDF; 2405.13871 - PDF;
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Anisotropies and non-Gaussianity of the Cosmological Gravitational Wave Background
/ Bartolo, N. (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua U. ; Padua Observ.) ; Bertacca, D. (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua U., Astron. Dept.) ; Matarrese, S. (U. Padua, Dept. Phys. Astron. ; GSSI, Aquila ; INFN, Padua ; Padua U.) ; Peloso, M. (INFN, Padua ; U. Padua, Dept. Phys. Astron.) ; Ricciardone, A. (INFN, Padua) ; Riotto, A. (CERN ; Geneva U., CAP) ; Tasinato, G. (Swansea U.)
The Stochastic Gravitational Wave Background (SGWB) is expected to be a key observable for Gravitational Wave (GW) interferometry. Its detection will open a new window on early universe cosmology and on the astrophysics of compact objects. [...]
arXiv:1908.00527.-
2019-12-04 - 7 p.
- Published in : Phys. Rev. D 100 (2019) 121501
Fulltext: PDF; Fulltext from Publisher: PDF;
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The effect of outflows on CMB bounds from Primordial Black Hole accretion
/ Piga, Lorenzo (Parma U. ; INFN, Parma) ; Lucca, Matteo (Brussels U.) ; Bellomo, Nicola (Texas U., TCC) ; Bosch-Ramon, Valentì (ICC, Barcelona U.) ; Matarrese, Sabino (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua Observ. ; GSSI, Aquila) ; Raccanelli, Alvise (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua Observ. ; CERN) ; Verde, Licia (ICC, Barcelona U. ; ICREA, Barcelona)
Should Primordial Black Holes (PBHs) exist in nature, they would inevitably accrete baryonic matter in their vicinity. In turn, the consequent emission of high-energy radiation could affect the thermal history of the universe to an extent that can be probed with a number of cosmological observables such as the Cosmic Microwave Background (CMB) anisotropies. [...]
arXiv:2210.14934; ULB-TH/22-14; UTWI-11-2022.-
2022-12-12 - 36 p.
- Published in : JCAP 2212 (2022) 016
Fulltext: PDF;
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Probing non-Gaussian Stochastic Gravitational Wave Backgrounds with LISA
/ Bartolo, Nicola (Padua U. ; INFN, Padua ; Padua Observ.) ; Domcke, Valerie (DESY) ; Figueroa, Daniel G. (EPFL, Lausanne, LPPC) ; García-Bellido, Juan (CERN ; Madrid, IFT) ; Peloso, Marco (Padua U. ; Minnesota U.) ; Pieroni, Mauro (Madrid, IFT) ; Ricciardone, Angelo (Stavanger U.) ; Sakellariadou, Mairi (King's Coll. London) ; Sorbo, Lorenzo (Massachusetts U., Amherst) ; Tasinato, Gianmassimo (Swansea U.)
The stochastic gravitational wave background (SGWB) contains a wealth of information on astrophysical and cosmological processes. A major challenge of upcoming years will be to extract the information contained in this background and to disentangle the contributions of different sources. [...]
arXiv:1806.02819; UMN-TH/3720-18; CERN-TH-2018-130; IFT-UAM/CSIC-18-58; DESY 18-086; KCL-PH-TH/2018-22; ACFI-T18-08; UMN-TH-3720-18; IFT-UAM-CSIC-18-58; DESY-18-086; KCL-PH-TH-2018-22.-
2018-11-21 - 33 p.
- Published in : JCAP 11 (2018) 034
Fulltext: PDF;
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CLASS_GWB: robust modeling of the astrophysical gravitational wave background anisotropies
/ Bellomo, Nicola (Texas U. ; U. Barcelona (main)) ; Bertacca, Daniele (U. Padua (main) ; INFN, Padua ; Padua Observ.) ; Jenkins, Alexander C. (King's Coll. London) ; Matarrese, Sabino (U. Padua (main) ; INFN, Padua ; Padua Observ. ; GSSI, Aquila) ; Raccanelli, Alvise (U. Padua (main) ; INFN, Padua ; CERN) ; Regimbau, Tania (Annecy, LAPP) ; Ricciardone, Angelo (U. Padua (main) ; INFN, Padua) ; Sakellariadou, Mairi (King's Coll. London)
Gravitational radiation offers a unique possibility to study the large-scale structure of the Universe, gravitational wave sources and propagation in a completely novel way. Given that gravitational wave maps contain a wealth of astrophysical and cosmological information, interpreting this signal requires a non-trivial multidisciplinary approach. [...]
arXiv:2110.15059; KCL-PH-TH-2021-70.-
2022-06-27 - 58 p.
- Published in : JCAP 2206 (2022) 030
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Signatures of Primordial non-Gaussianities in the Matter Power-Spectrum and Bispectrum: the Time-RG Approach
/ Bartolo, Nicola (Padua U. ; INFN, Padua) ; Almeida, Juan P.Beltrán (Sao Paulo, IFT) ; Matarrese, Sabino (Padua U. ; INFN, Padua) ; Pietroni, Massimo (INFN, Padua) ; Riotto, Antonio (INFN, Padua ; CERN)
We apply the time-renormalization group approach to study the effect of primordial non-Gaussianities in the non-linear evolution of cosmological dark matter density perturbations. This method improves the standard perturbation approach by solving renormalization group-like equations governing the dynamics of gravitational instability. [...]
CERN-PH-TH-2009-260; arXiv:0912.4276; CERN-PH-TH-2009-260.-
2010 - 26 p.
- Published in : JCAP 03 (2010) 011
Preprint: PDF; External link: Preprint
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10.
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Science with the Einstein Telescope: a comparison of different designs
/ Branchesi, Marica (GSSI, Aquila ; Gran Sasso) ; Maggiore, Michele (Geneva U., Dept. Theor. Phys. ; Geneva U.) ; Alonso, David (Oxford U.) ; Badger, Charles (King's Coll. London) ; Banerjee, Biswajit (GSSI, Aquila ; Gran Sasso) ; Beirnaert, Freija (Gent U.) ; Belgacem, Enis (Geneva U.) ; Bhagwat, Swetha (Rome U. ; Birmingham U.) ; Boileau, Guillaume (U. Antwerp (main) ; ARTEMIS, Nice) ; Borhanian, Ssohrab (Jena U., TPI) et al.
The Einstein Telescope (ET), the European project for a third-generation gravitational-wave detector, has a reference configuration based on a triangular shape consisting of three nested detectors with 10 km arms, where in each arm there is a `xylophone' configuration made of an interferometer tuned toward high frequencies, and an interferometer tuned toward low frequencies and working at cryogenic temperature. Here, we examine the scientific perspectives under possible variations of this reference design. [...]
arXiv:2303.15923; ET-0084A-23.-
2023-07-28 - 197 p.
- Published in : JCAP 2307 (2023) 068
Fulltext: document - PDF; 2303.15923 - PDF;
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