GW190521 as a Merger of Proca Stars: A Potential New Vector Boson of 
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Bustillo, J. Calderón; Sanchis-Gual, N.; Torres-Forné, A.; Font, José A.; Vajpeyi, A.; Smith, R. J. E.; Herdeiro, Carlos; Radu, Eugen; Leong, Samson H. W.

doi:10.1103/physrevlett.126.081101

Cited by 194 publications

(95 citation statements)

References 54 publications

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“…The detection of this event, together with its candidate optical counterpart ZTF19abanrhr [3], indicates the potential existence of BHs in the mass gap predicted by (pulsational) pair-instability supernova theory [2,4,5]. A few studies also suggest that this system could admit an extremely eccentric [2,6], hyperbolic [7], or a head-on [2,8] merger interpretation, placing possible constraints on the binary's formation channel [6,7,9]. For such an event, most of the GW detected by the Advanced LIGO [10], VIRGO [11], and KAGRA [12,13] network is dominated by the merger and ringdown portions.…”

Section: Introductionmentioning

confidence: 94%

Universal features of gravitational waves emitted by superkick binary black hole systems

Giesler²,

Varma³

et al. 2021

Phys. Rev. D

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We use numerical relativity to study the merger and ringdown stages of "superkick" binary black hole systems (those with equal mass and antiparallel spins). We find a universal way to describe the mass and current quadrupole gravitational waves emitted by these systems during the merger and ringdown stage: (i) The time evolutions of these waves are insensitive to the progenitor's parameters (spins) after being normalized by their own peak values. (ii) The peak values, which encode all the spin information of the progenitor, can be consistently fitted to formulas inspired by post-Newtonian theory. We find that the universal evolution of the mass quadrupole wave can be accurately modeled by the so-called Backwards One-Body (BOB) model. However, the BOB model, in its present form, leads to a lower waveform match and a significant parameter-estimation bias for the current quadrupole wave. We also decompose the ringdown signal into seven overtones, and study the dependence of mode amplitudes on the progenitor's parameters. Such dependence is found to be insensitive to the overtone index (up to a scaling factor). Finally, we use the Fisher matrix technique to investigate how the ringdown waveform can be at least as important for parameter estimation as the inspiral stage. Assuming the Cosmic Explorer, we find the contribution of ringdown portion dominates as the total mass exceeds ∼250 M ⊙ . For massive binary black hole (BBH) systems, the accuracy of parameter measurement is improved by incorporating the information of ringdown-the ringdown sector gives rise to a different parameter correlation from inspiral stage; hence, the overall parameter correlation is reduced in full signal.

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Section: Introductionmentioning

confidence: 94%

Universal features of gravitational waves emitted by superkick binary black hole systems

Giesler²,

Varma³

et al. 2021

Phys. Rev. D

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“…Using the GWTC-2 events of LIGO and Virgo, the authors in [248] find that the existence of scalar bosons in the mass range between 1.3 × 10 −13 eV and 2.7 × 10 −13 eV is strongly disfavoured. An attempt to look for DM candidates using CBC events has been done in [249], where the GW190521 event could have been produced not by the standard merger of a pair of black holes, but could be due to the merger of two head-on collisions proca stars i.e., bosons stars constituted by ultra-light vector boson particles with masses of 8.72 +0. 73 −0.82 × 10 −13 eV.…”

Section: Dark Mattermentioning

confidence: 99%

Advanced Virgo: Status of the Detector, Latest Results and Future Prospects

et al. 2021

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The Virgo detector, based at the EGO (European Gravitational Observatory) and located in Cascina (Pisa), played a significant role in the development of the gravitational-wave astronomy. From its first scientific run in 2007, the Virgo detector has constantly been upgraded over the years; since 2017, with the Advanced Virgo project, the detector reached a high sensitivity that allowed the detection of several classes of sources and to investigate new physics. This work reports the main hardware upgrades of the detector and the main astrophysical results from the latest five years; future prospects for the Virgo detector are also presented.

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“…As the calculations indicate, in the absence of the charges/currents in the right-hand sides of Eqs. (10) and (11), regular solutions exist only for α = 1. This corresponds to the fact that in this case the masses of the Proca fields {f, h} and {w, k} are not equal to each other.…”

Section: E P-ball With a Nonzero Total Angular Momentummentioning

confidence: 99%

“…Interest in studying Proca fields in various aspects has increased considerably in recent years because of the possibility of obtaining new solutions suitable for the description of various physical objects and processes. In particular, these can be compact, strongly gravitating starlike configurations [5][6][7][8][9][10], black holes [11],…”

Section: Introductionmentioning

confidence: 99%

Proca balls with angular momentum or flux of electric field

Dzhunushaliev,

Folomeev

2021

Preprint

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Within SU(2) Higgs-Proca theory, we obtain a family of nontopological static solutions describing localized, finite-energy configurations (Proca balls). The gauge symmetry of the theory is explicitly broken by introducing a vector Proca field whose components have different masses. Such solutions describe particlelike systems, the crucial feature of which is that they either possess a nonzero total angular momentum or have a flux of electric field through the plane of symmetry of such objects. It is shown that the angular momentum is provided by static crossed electric and magnetic fields. The existence of the solutions is caused by the fact that we circumvent the conditions of the no-go theorem, according to which there are no stationary and axially symmetric spinning excitations for the 't Hooft-Polyakov monopoles, Julia-Zee dyons, sphalerons, and also vortices. The dependence of some integral physical quantities on the ratio of the Proca-field masses is studied. It is demonstrated that the inclusion of external sources (charges) enables one to obtain solutions with equal Procafield masses. We also discuss the possibilities of using quarks as sources of the Proca field under investigation and for treating the Proca balls as glueballs in SU(2) Higgs-Proca theory.

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GW190521 as a Merger of Proca Stars: A Potential New Vector Boson of 8.7×10−13 eV

Cited by 194 publications

References 54 publications

Universal features of gravitational waves emitted by superkick binary black hole systems

Universal features of gravitational waves emitted by superkick binary black hole systems

Advanced Virgo: Status of the Detector, Latest Results and Future Prospects

Proca balls with angular momentum or flux of electric field

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