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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
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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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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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4.
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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
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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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6.
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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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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
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Characterizing the Cosmological Gravitational Wave Background Anisotropies and non-Gaussianity
/ Bartolo, Nicola (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua Observ.) ; Bertacca, Daniele (U. Padua, Dept. Phys. Astron. ; INFN, Padua) ; Matarrese, Sabino (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua Observ. ; GSSI, Aquila) ; Peloso, Marco (Padua U., Dept. Pure Appl. Math. ; INFN, Padua) ; Ricciardone, Angelo (INFN, Padua) ; Riotto, Antonio (Geneva U., CAP ; CERN ; Geneva U., Dept. Theor. Phys.) ; Tasinato, Gianmassimo (Swansea U.)
A future detection of the Stochastic Gravitational Wave Background (SGWB) with GW experiments is expected to open a new window on early universe cosmology and on the astrophysics of compact objects. In this paper we study SGWB anisotropies, that can offer new tools to discriminate between different sources of GWs. [...]
arXiv:1912.09433.-
2020-07-17 - 22 p.
- Published in : Phys. Rev. D 102 (2020) 023527
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Constraining extended cosmologies with GW×LSS cross-correlations
/ Bosi, M. (Padua U.) ; Bellomo, N. (U. Texas, Austin (main)) ; Raccanelli, A. (Padua U. ; INFN, Padua ; Padua Observ. ; CERN)
The rapid development of gravitational wave astronomy provides the unique opportunity of exploring the dynamics of the Universe using clustering properties of coalescing binary black hole mergers. Gravitational wave data, along with information coming from future galaxy surveys, have the potential of shedding light about many open questions in Cosmology, including those regarding the nature of dark matter and dark energy. [...]
arXiv:2306.03031; UTWI-20-2023.-
2023-11-24 - 12 p.
- Published in : JCAP 2311 (2023) 086
Fulltext: Publication - PDF; 2306.03031 - PDF;
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10.
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The Ineludible non-Gaussianity of the Primordial Black Hole Abundance
/ De Luca, V. (Geneva U., CAP) ; Franciolini, G. (Geneva U., CAP) ; Kehagias, A. (Natl. Tech. U., Athens) ; Peloso, M. (U. Padua, Dept. Phys. Astron. ; INFN, Padua) ; Riotto, A. (Geneva U., CAP ; CERN) ; Ünal, C. (Rez, Nucl. Phys. Inst.)
We study the formation of primordial black holes when they are generated by the collapse of large overdensities in the early universe. Since the density contrast is related to the comoving curvature perturbation by a nonlinear relation, the overdensity statistics is unavoidably non-Gaussian. [...]
arXiv:1904.00970.-
2019-07-31 - 26 p.
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