Constraints on Braneworld Gravity Models from a Kinematic Limit on the Age of the Black Hole XTE<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">J</mml:mi><mml:mn>1118</mml:mn><mml:mo>+</mml:mo><mml:mn>480</mml:mn></mml:math>

Psaltis, Dimitrios

doi:10.1103/physrevlett.98.181101

Cited by 28 publications

(30 citation statements)

References 23 publications

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“…As noticed recently by Dimitrios Psaltis [22], "in braneworld gravity models with a finite AdS curvature in the extra dimension, the AdS/CFT correspondence leads to a prediction for the lifetime of astrophysical black holes that is significantly smaller than the Hubble time, for asymptotic curvatures that are consistent with current experiments." Psaltis used the recent measurement of the velocity of the black hole XTE J1118+480 to calculate a lower limit 11 × 10 9 years on the time needed for this black hole to move from the Galaxy plane, where it was born, to its present position in the Galaxy.…”

supporting

confidence: 62%

Editorial note to: Brandon Carter, Black hole equilibrium states Part II. General theory of stationary black hole states

Abramowicz

2010

Gen Relativ Gravit

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supporting

confidence: 62%

Editorial note to: Brandon Carter, Black hole equilibrium states Part II. General theory of stationary black hole states

Abramowicz

2010

Gen Relativ Gravit

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“…Casares & Jonker 2014) (Garcia et al 2001, although see Fender, Gallo & Jonker 2003), constraints on the equation of state of neutron ⋆ E-mail: dave.russell@nyu.edu stars (e.g. Heinke et al 2003;Guillot et al 2013) and even constraints on braneworld gravity models and the size of extra dimensions (Psaltis 2007;Johannsen 2009;González Hernández, Rebolo & Casares 2014). Evidence for accretion onto the compact object at these lowest luminosities implies these sources never truly switch off.…”

Section: Introductionmentioning

confidence: 99%

Polarized synchrotron emission in quiescent black hole X-ray transients

Russell¹,

Shahbaz²,

Lewis³

et al. 2016

Mon. Not. R. Astron. Soc.

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We present near-infrared polarimetric observations of the black hole X-ray binaries Swift J1357.2-0933 and A0620-00. In both sources, recent studies have demonstrated the presence of variable infrared synchrotron emission in quiescence, most likely from weak compact jets. For Swift J1357.2-0933 we find that the synchrotron emission is polarized at a level of 8.0 ± 2.5 per cent (a 3.2 σ detection of intrinsic polarization). The mean magnitude and rms variability of the flux (fractional rms of 19-24 per cent in K S -band) agree with previous observations. These properties imply a continuously launched (stable on long timescales), highly variable (on short timescales) jet in the Swift J1357.2-0933 system in quiescence, which has a moderately tangled magnetic field close to the base of the jet. We find that for A0620-00, there are likely to be three components to the optical-infrared polarization; interstellar dust along the line of sight, scattering within the system, and an additional source that changes the polarization position angle in the reddest (H and K S ) wave-bands. We interpret this as a stronger contribution of synchrotron emission, and by subtracting the line-of-sight polarization, we measure an excess of ∼ 1.25±0.28 per cent polarization and a position angle of the magnetic field vector that is consistent with being parallel with the axis of the resolved radio jet. These results imply that weak jets in low luminosity accreting systems have magnetic fields which possess similarly tangled fields compared to the more luminous, hard state jets in X-ray binaries.

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“…Therefore, astrophysical black holes can radiate away most of their mass at cosmologically relevant timescales. This property has been used to constrain L from a kinematic limit on the age of the black hole XTE J1118+480 (Psaltis 2007), yielding L < 80 μm, as well as to give a possible explanation of the unusual observed black hole mass function (Postnov & Cherepashchuk 2003).…”

Section: Introductionmentioning

confidence: 99%

Constraints on the Size of Extra Dimensions From the Orbital Evolution of Black-Hole X-Ray Binaries

Johannsen

Psaltis

McClintock

2009

ApJ

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One of the plausible unification schemes in physics considers the observable universe to be a four-dimensional surface (the "brane") embedded in a higher dimensional curved spacetime (the "bulk"). In such braneworld gravity models with infinitely large extra dimensions, black holes evaporate fast through the emission of the additional gravitational degrees of freedom, resulting in lifetimes of stellar-mass black holes that are significantly smaller than the Hubble time. We show that the predicted evaporation rate leads to a change in the orbital period of X-ray binaries harboring black holes that is observable with current instruments. We obtain an upper limit on the rate of change of the orbital period of the binary A0620−00 and use it to constrain the asymptotic curvature radius of the extra dimension to a value comparable to the one obtained by table-top experiments. Furthermore, we argue that any measurement of a period increase for low-mass X-ray binaries with a high mass ratio is evidence for new physics beyond general relativity and the standard model.

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Constraints on Braneworld Gravity Models from a Kinematic Limit on the Age of the Black Hole XTEJ1118+480

Cited by 28 publications

References 23 publications

Editorial note to: Brandon Carter, Black hole equilibrium states Part II. General theory of stationary black hole states

Editorial note to: Brandon Carter, Black hole equilibrium states Part II. General theory of stationary black hole states

Polarized synchrotron emission in quiescent black hole X-ray transients

Constraints on the Size of Extra Dimensions From the Orbital Evolution of Black-Hole X-Ray Binaries

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