Could supermassive black holes be quintessential primordial black holes?

Bean, Rachel; Magueijo, João

doi:10.1103/physrevd.66.063505

Cited by 247 publications

(245 citation statements)

References 35 publications

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“…1) c) PBHs growing substantially by accreting quintessence fields [10] are fine-tuned in Newtonian gravity [11], and vanish entirely in a fully relativistic treatment [12].…”

Section: Hawking Emission and Accretion Of Pbhs: Some New Resultsmentioning

confidence: 99%

Some results on the evolution of primordial black holes

Horvath¹,

Custódio²

2005

Braz. J. Phys.

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We briefly review some recent results related to thermodynamics of semiclassical black holes applied to their primordial formation. Issues on the existence of an influx of ambient particles onto the PBHs, which may help grow them, are addressed. We revisit the integrated flux from evaporated PBHs contributing to the present backgrounds and show that there probe mass scales which are otherwise poorly constrained. Finally the Generalized Second Law of Thermodynamics and the Holographic Principle are combined to show that if some form of the latter holds, strong upper bounds to the mass density of PBHs formed in the early universe may be obtained, especially for inflationary cosmological models. This method is completely independent from those based on the background fluxes and applies to potentially important epochs of PBH formation, resulting in quite strong constraints to Ω pbh .

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“…1) c) PBHs growing substantially by accreting quintessence fields [10] are fine-tuned in Newtonian gravity [11], and vanish entirely in a fully relativistic treatment [12].…”

Section: Hawking Emission and Accretion Of Pbhs: Some New Resultsmentioning

confidence: 99%

Some results on the evolution of primordial black holes

Horvath¹,

Custódio²

2005

Braz. J. Phys.

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“…If dark energy influences the perturbations on small scales as proposed by Arbey et al (2001), Bean & Magueijo (2002), Padmanabhan & Choudhury (2002), or Bagla et al (2002), the collapse of structures itself will be affected. In our simulations, we also ignore any possibility of dark energy clustering and influencing the cluster formation.…”

Section: Simulation Modelsmentioning

confidence: 99%

Cluster scaling relations from cosmological hydrodynamic simulations in a dark-energy dominated universe

Aghanim¹,

Silva²,

Nunes³

2009

A&A

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Context. Clusters are potentially powerful tools for cosmology provided their observed properties, such as the Sunyaev-Zel'dovich (SZ) or X-ray signals, can be translated into physical quantities like mass and temperature. Scaling relations are the appropriate means to perform this translation. It is, therefore, important to understand their evolution and their modifications with respect to the physics and to the underlying cosmology. Aims. In this spirit, we investigate the effect of dark energy on the X-ray and SZ scaling relations. The study is based on the first hydrosimulations of cluster formation for diferent models of dark energy. We present results for four dark-energy models which differ from each other by their equations-of-state parameter, w. Namely, we use a cosmological constant model w = −1 (as a reference), a perfect fluid with constant equation of state parameter w = −0.8 and one with w = −1.2 and a scalar field model (or quintessence) with varying w. Methods. We generate N-body/hydrodynamic simulations that include radiative cooling with the public version of the Hydra code, modified to consider an arbitrary dark-energy component. We produce cluster catalogues for the four models and derive the associated X-ray and SZ scaling relations. Results. We find that dark energy has little effect on scaling laws, making it safe to use the standard ΛCDM scalings for conversion of observed quantities into cluster temperatures and masses.

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“…The question of whether or not SMBHs can be grown from the merging of stellarmass black holes has also been discussed in recent work (see Li et al [2007] and references therein). While in each scenario a case may be made for the ability of these seeds to result in the SMBHs we observe as quasars, sometimes requiring the invocation of self-interacting dark matter (Ostriker 2000;Hu et al 2006) or the accretion of scalar fields ( Bean & Magueijo 2002), there is as yet no consensus on the matter. We suggest that PBHs may be viable SMBH seed candidates because of their ability to build up large dark matter halos that may assist in further growth through baryon accretion later on.…”

Section: Pbhs As Smbh Seedsmentioning

confidence: 99%

Growth of Structure Seeded by Primordial Black Holes

Mack

Ostriker

Ricotti

2007

ApJ

157

187

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We discuss the possibilities for the growth of primordial black holes (PBHs) via the accretion of dark matter. In agreement with previous works, we find that accretion during the radiation-dominated era does not lead to a significant mass increase. However, during matter domination, PBHs may grow by up to 2 orders of magnitude in mass through the acquisition of large dark matter halos. We discuss the possibility of PBHs being an important component in dark matter halos of galaxies, as well as their potential to explain the ultraluminous X-ray sources (ULXs) observed in nearby galactic disks. We point out that although PBHs are ruled out as the dominant component of dark matter, there is still a great deal of parameter space that is open to their playing a role in the modern-day universe. For example, a primordial halo population of PBHs each at 10 2.5 M , making up 0.1% of the dark matter, grows to 10 4.5 M via the accumulation of dark matter halos and accounts for $10% of the dark matter mass by a redshift of z % 30. These intermediate-mass black holes may then ''light up'' when passing through molecular clouds, becoming visible as ULXs at the present day, or they may form the seeds for supermassive black holes at the centers of galaxies.

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Could supermassive black holes be quintessential primordial black holes?

Cited by 247 publications

References 35 publications

Some results on the evolution of primordial black holes

Some results on the evolution of primordial black holes

Cluster scaling relations from cosmological hydrodynamic simulations in a dark-energy dominated universe

Growth of Structure Seeded by Primordial Black Holes

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