Search for intermediate mass black hole binaries in the first observing run of Advanced LIGO

Abbott, B. P.; Jawahar, S.; Lockerbie, N. A.; Tokmakov, K. V.

doi:10.1103/physrevd.96.022001

Cited by 89 publications

(96 citation statements)

References 94 publications

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“…For the widest orbits the merger time may be reduced by an order of magnitude, but integrated over the entire population of binaries, the increase in the merger rate today is an O(10%) effect. This effect is comparable in size to uncertainties in the detectors' amplitude calibration, which introduces an uncertainty of about 18% in the upper limit on the merger rate [44]. This work therefore increases the robustness of LIGO limits on the PBH fraction (such as those of Refs.…”

Section: Discussionmentioning

confidence: 71%

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Merger rate of a subdominant population of primordial black holes

2018

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The formation of astrophysical and primordial black holes influences the distribution of dark matter surrounding them. Black holes are thus expected to carry a dark matter 'dress' whose properties depend on their formation mechanism and on the properties of the environment. Here we carry out a numerical and analytical study of the merger of dressed black holes, and show that the distribution of dark matter around them dramatically affects the dynamical evolution of the binaries. Although the final impact on the merger rate of primordial black holes is rather small with respect to the case of 'naked' black holes, we argue that our analysis places the calculation of this rate on more solid ground, with LIGO-Virgo observations ruling out a dark matter fraction of 10 −3 for primordial black holes of 100 solar masses, and it paves the way to more detailed analyses of environmental effects induced by dark matter on the gravitational wave emission of binary black holes.

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Section: Discussionmentioning

confidence: 71%

“…1 of Ref. [44]). 8 As in the previous section, we calculate R LIGO by Monte Carlo sampling, in this case weighting each sample by the sensitivity S(z).…”

Section: B Ligo/virgo Upper Limitmentioning

confidence: 88%

Merger rate of a subdominant population of primordial black holes

2018

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“…ET is expected to observe GW events up to z ≈ 2, for which our results predict a detection rate of ≈ 2 Gpc −3 yr −1 . Advanced LIGO, VIRGO, and KAGRA will be able to observe the lowend of the IMBH population ( 10 3 M ) up to z ≈ 1.0 (Abbott et al 2017). Our models predict a rate of 0.1 − 0.5 Gpc −3 yr −1 for 0.6 z 1 for 300 M IMBH 1000 M .…”

Section: Tidal Disruption Eventsmentioning

confidence: 67%

Tidal Disruption Events and Gravitational Waves from Intermediate-mass Black Holes in Evolving Globular Clusters across Space and Time

Fragione

Leigh

Ginsburg

et al. 2018

ApJ

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We present a semi-analytic model for self-consistently evolving a population of globular clusters (GCs) in a given host galaxy across cosmic time. We compute the fraction of GCs still hosting intermediate-mass black holes (IMBHs) at a given redshift in early and late type galaxies of different masses and sizes, and the corresponding rate of tidal disruption events (TDEs), both main-sequence (MS) and white dwarf (WD) stars. We find that the integrated TDE rate for the entire GC population can exceed the corresponding rate in a given galactic nucleus and that ∼ 90% of the TDEs reside in GCs within a maximum radius of ∼ 2 − 15 kpc from the host galaxy's center. This suggests that observational efforts designed to identify TDEs should not confine themselves to galactic nuclei alone, but should also consider the outer galactic halo where massive old GCs hosting IMBHs would reside. Indeed, such off-centre TDEs as predicted here may already have been observed. MS TDE rates are more common than WD TDE rates by a factor 30 (100) at z ≤ 0.5 (z = 2). We also calculate the rate of IMBH-SBH mergers across cosmic time, finding that the typical IMRI rate at low redshift is of the order of ∼ 0.5 − 3 Gpc −3 yr −1 , which becomes as high as ∼ 100 Gpc −3 yr −1 near the peak of GC formation. Advanced LIGO combined with VIRGO, KAGRA, ET and LISA will be able to observe the bottom-end and top-end of the IMBH population, respectively.

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“…However, as shown in [43] and consistently with the first estimates in [44], the currently observed binary merger rate of PBHs should actually be dominated (by orders of magnitude) by binaries formed in the early Universe, before matter-radiation equality. The estimated rates from the reported LIGO/Virgo detections range from approximately 1 to 100 events per year and cubic Gpc [45][46][47], which limits the PBH contribution to DM in the stellar mass range to sub-percent level. Taken at face value, this bound is the strongest one so far on the PBH abundance for masses O(10)M .This conclusion is robust as long as the orbital parameters of the PBH binaries formed in the 1 Only the most recent and constraining analyses of each kind known to us are reported in this list.…”

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confidence: 99%

On the merger rate of primordial black holes: effects of nearest neighbours distribution and clustering

Ballesteros

Serpico

Taoso

2018

J. Cosmol. Astropart. Phys.

115

113

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One of the seemingly strongest constraints on the fraction of dark matter in the form of primordial black holes (PBH) of O(10) M relies on the merger rate inferred from the binary BH merger events detected by LIGO/Virgo. The robustness of these bounds depends however on the accuracy with which the formation of PBH binaries in the early Universe can be described. We revisit the standard estimate of the merger rate, focusing on a couple of key ingredients: the spatial distribution of nearest neighbours and the initial clustering of PBHs associated to a given primordial power spectrum. Overall, we confirm the robustness of the results presented in the literature in the case of a narrow mass function (which constrain the PBH fraction of dark matter to be f PBH 0.001 − 0.01). The initial clustering of PBHs might have an effect tightening the current constraint, but only for very broad mass functions, corresponding to wide bumps in the primordial power spectra extending at least over a couple of decades in k-space.The recent LIGO/Virgo discoveries of binary black hole (BH) and neutron star (NS) mergers have ushered us in the era of gravitational wave (GW) astronomy [1][2][3][4], leading in a short time to interesting implications on several branches of physics. In particular, even though only a single NS-NS merger has been detected so far [4], its multi-messenger observation [5] has permitted to draw a number of inferences, ranging from constraints on the nuclear equation of state [6,7] and some alternative models of gravity at large scales [8-11] (a possibility anticipated in [12]) to the identification of an engine of short gamma-ray bursts [13] and r-process (and thus the nucleosynthesis of heavy elements) [14].On the other hand, the origin of the progenitors of the few observed binary BH mergers has yet to be determined. The high value of some of their mean component masses (above 30 M ) are suggestive of progenitor formation in low-metallicity environments; see e.g. [15]. Besides, classical isolated binary evolution via mass transfer including a common envelope phase has been shown to be capable of reproducing the first detected events with a single channel [16]. Yet, many uncertainties remain in the assumptions and parameters of astrophysical models of BH (and binary BH) formation; for a compact review, see [17]. For instance, a dynamical origin of the binaries, notably in young massive and open stellar clusters, is a viable (albeit uncertain) possibility, see e.g. [18,19]. Furthermore, a multi-channel origin, in particular the idea that some or all of the mergers could be primordial -a proposal dating back to [20]; see [21] for a recent review-cannot be disregarded at the moment [17].Soon after the first merger was detected, some authors [22,23] went as far as conjecturing that the population of BHs responsible for these mergers is, in fact, not only primordial, but also accounts for the still unidentified dark matter (DM) which constitutes about one quarter of the energy density of the Universe [24]. The plausi...

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Search for intermediate mass black hole binaries in the first observing run of Advanced LIGO

Cited by 89 publications

References 94 publications

Merger rate of a subdominant population of primordial black holes

Merger rate of a subdominant population of primordial black holes

Tidal Disruption Events and Gravitational Waves from Intermediate-mass Black Holes in Evolving Globular Clusters across Space and Time

On the merger rate of primordial black holes: effects of nearest neighbours distribution and clustering

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