Signatures of Einstein-Maxwell dilaton-axion gravity from the observed jet power and the radiative efficiency

Abstract

The Einstein-Maxwell dilaton-axion (EMDA) gravity arises in the low energy effective action of the heterotic string theory and provides a simple framework to explore the signatures of the same. The dilaton and the axion fields inherited in the action from string compactifications have interesting consequences in inflationary cosmology and in explaining the present accelerated expansion of the universe. It is therefore worthwhile to search for the footprints of these fields in the available astrophysical observations. Since Einstein gravity is expected to receive quantum corrections in the high curvature domain, the near horizon regime of black holes seems to be the ideal astrophysical laboratory to test these deviations from general relativity. Exact, stationary and axisymmetric black hole solution in EMDA gravity corresponds to the Kerr-Sen spacetime which carries dilaton charge, while the angular momentum is sourced by the axion field. The ballistic jets and the peak emission of the continuum spectrum from the accretion disk are believed to be launched very close to the event horizon and hence should bear the imprints of the background spacetime. We compute the jet power and the radiative efficiency derived from the continuum spectrum in the Kerr-Sen background and compare them with the corresponding observations of microquasars. Our analysis reveals that Kerr black holes are more favored compared to Kerr-Sen black holes with dilaton charges.

arXiv commentMatches published version

References in corpus (111)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Observation of Gravitational Waves from a Binary Black Hole Merger
• A Large Mass Hierarchy from a Small Extra Dimension
• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• The Confrontation between General Relativity and Experiment
• GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence
• GW170104: Observation of a 50-Solar-Mass Binary Black Hole Coalescence at Redshift 0.2
• Modified gravity with negative and positive powers of the curvature: unification of the inflation and of the cosmic acceleration
• Heterotic and Type I String Dynamics from Eleven Dimensions
• Tests of general relativity with GW150914
• First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
• Eleven-Dimensional Supergravity on a Manifold with Boundary
• The Confrontation between General Relativity and Experiment
• First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole
• Testing General Relativity with Present and Future Astrophysical Observations
• First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring
• The Einstein Equations on the 3-Brane World
• Towards a unified model for black hole X-ray binary jets
• Binary Black Hole Mergers in the first Advanced LIGO Observing Run
• First M87 Event Horizon Telescope Results. II. Array and Instrumentation
• Modified f(R) gravity consistent with realistic cosmology: from matter dominated epoch to dark energy universe
• Sources of Relativistic Jets in the Galaxy
• First M87 Event Horizon Telescope Results. III. Data Processing and Calibration
• Quantum Nature of the Big Bang
• Cosmological viability of f(R)-gravity as an ideal fluid and its compatibility with a matter dominated phase
• Exploring the String Axiverse with Precision Black Hole Physics
• Black Hole Entropy from Loop Quantum Gravity
• Going with the flow: can the base of jets subsume the role of compact accretion disk coronae?
• The Spin of the Near-Extreme Kerr Black Hole GRS 1915+105
• Black holes on the brane
• Black Hole Spin and the Radio Loud/Quiet Dichotomy of Active Galactic Nuclei
• Black hole hair in generalized scalar-tensor gravity
• Rotating Charged Black Hole Solution in Heterotic String Theory
• GRS 1915+105 and the Disc-Jet Coupling in Accreting Black Hole Systems
• Estimating the Spin of Stellar-Mass Black Holes via Spectral Fitting of the X-ray Continuum
• A new method for shadow calculations: application to parameterised axisymmetric black holes
• Gravitational wave searches for ultralight bosons with LIGO and LISA
• Black Hole Spin via Continuum Fitting and the Role of Spin in Powering Transient Jets
• Optical Observations of GRO J1655-40 in Quiescence I: A Precise Mass for the Black Hole Primary
• Black Hole Superradiance Signatures of Ultralight Vectors
• The Current Ability to Test Theories of Gravity with Black Hole Shadows
• Precise mass and spin measurements for a stellar-mass black hole through X-ray timing: the case of GRO J1655-40
• Black Hole Solutions in Heterotic String Theory on a Torus
• A Parallax Distance to the Microquasar GRS 1915+105 and a Revised Estimate of its Black Hole Mass
• Lanczos-Lovelock models of gravity
• Constraining the mass of dark photons and axion-like particles through black-hole superradiance
• Dynamical Evidence for a Black Hole in the Microquasar XTE J1550-564
• Stochastic and resolvable gravitational waves from ultralight bosons
• Optical and Infrared Photometry of the Micro-Quasar GRO J1655-40 in Quiescence
• Observational Evidence for a Correlation Between Jet Power and Black Hole Spin
• Lower Bound on the Propagation Speed of Gravity from Gravitational Cherenkov Radiation
• The Spin of the Black Hole Microquasar XTE J1550-564 via the Continuum-Fitting and Fe-Line Methods
• An Improved Dynamical Model for the Microquasar XTE J1550-564
• Jets from X-ray binaries
• Hidden symmetries, null geodesics, and photon capture in the Sen black hole
• The Distance, Inclination, and Spin of the Black Hole Microquasar H1743-322
• Black holes and stars in Horndeski theory
• The Inclination of the Soft X-ray Transient A0620--00 and the Mass of its Black Hole
• Kerr Black Holes are Not Unique to General Relativity
• Jet Power and Black Hole Spin: Testing an Empirical Relationship and Using it to Predict the Spins of Six Black Holes
• Identification of the donor in the X-ray binary GRS 1915+105
• Measuring Supermassive Black Hole Spins in Active Galactic Nuclei
• Kerr-Sen dilaton-axion black hole lensing in the strong deflection limit
• The Spin of the Black Hole in the Soft X-ray Transient A0620--00
• Vacuum solutions of the gravitational field equations in the brane world model
• Charge Quantization of Axion-Dilaton Black Holes
• Testing the Kerr-nature of stellar-mass black hole candidates by combining the continuum-fitting method and the power estimate of transient ballistic jets
• Was Einstein Right? Testing Relativity at the Centenary
• Does a Randall-Sundrum scenario create the illusion of a torsion-free universe?
• Spherically symmetric brane spacetime with bulk $f(\mathcal{R})$ gravity
• Following the 2008 outburst decay of the black hole candidate H1743-322 in X-ray and radio
• The inflationary universe in F(R) gravity with antisymmetric tensor fields and their suppression during the universe evolution
• Constraining some Horndeski gravity theories
• Minimal Length and Small Scale Structure of Spacetime
• Higher Order Terms of Kerr Parameter for Blandford-Znajek Monopole Solution
• Physical Properties of Four Dimensional Superstring Gravity Black Hole Solutions
• Logarithmic-corrected $R^2$ Gravity Inflation in the Presence of Kalb-Ramond Fields
• Hidden and Generalized Conformal Symmetry of Kerr-Sen Spacetimes
• The Mass of the Black Hole in the X-ray Binary Nova Muscae 1991
• Effective field equation on m-brane embedded in n-dimensional bulk of Einstein and f(R) gravity
• Multiple ejections during the 1975 outburst of A0620-00
• Recurrent Acceleration in Dilaton-Axion Cosmology
• Null Geodesics and Observables around Kerr-Sen Black Hole
• A new model for QPOs in accreting black holes: application to the microquasar GRS 1915+105
• The low or retrograde spin of the first extragalactic microquasar: implications for Blandford-Znajek powering of jets
• Blandford-Znajek mechanism in black holes in alternative theories of gravity
• Observational signature of a near-extremal Kerr-Sen black hole in the heterotic string theory
• Stationary Charged Scalar Clouds around Black Holes in String Theory
• The Spin of The Black Hole in the X-ray Binary Nova Muscae 1991
• Kerr-Sen Black Hole as Accelerator for Spinning Particles
• Decoding signatures of extra dimensions and estimating spin of quasars from the continuum spectrum
• Scalar clouds around Kerr-Sen black holes
• Effective gravitational equations for f(R) braneworld models
• Constraining Relativistic Generalizations of Modified Newtonian Dynamics with Gravitational Waves
• On Lovelock galileons and black holes
• Implications of Einstein-Maxwell dilaton-axion gravity from the black hole continuum spectrum
• Massive vector fields in Kerr--Newman and Kerr--Sen black hole spacetimes
• Why has spacetime torsion such negligible effect on our universe?
• Low energy effective gravitational equations on a Gauss-Bonnet brane
• What is the closest black hole to the Sun?
• Axion-Dilaton Cosmology and Dark Energy
• Thermodynamic Products for Sen Black Hole
• Bulk torsion fields in theories with large extra dimensions
• Positivity of Energy in Einstein-Maxwell Axion-dilaton gravity
• Invisibility of antisymmetric tensor fields in the light of $F(R)$ gravity
• Exact static solutions in four dimensional Einstein-Maxwell-Dilaton gravity
• Dynamical suppression of spacetime torsion
• Test of Kerr-Sen metric with black hole observations
• Infrared study of H1743-322 in outburst: a radio-quiet and NIR-dim microquasar
• Penrose process in charged axion-dilaton coupled black hole

Cited by in corpus (12)

• Probing spacetime and accretion model for the Galactic Center: Comparison of Kerr and dilaton black hole shadows
• Thin accretion disk and shadow of Kerr-Sen black hole in Einstein-Maxwell-dilaton-axion gravity
• Blandford-Znajek Process in Quadratic Gravity
• Blandford-Znajek jets in MOdified Gravity
• Deep learning inference with the Event Horizon Telescope I. Calibration improvements and a comprehensive synthetic data library
• Signatures of Einstein-Maxwell dilaton-axion gravity from the observed quasi-periodic oscillations in black holes
• Constraining the rotating Simpson-Visser spacetime from the observed quasi-periodic oscillations in black holes
• Observed jet power and radiative efficiency of black hole candidates in Kerr + PFDM model
• Noncommutative Reissner-Nordström black hole from noncommutative charged scalar field
• Neutral particle collisions near Gibbons-Maeda-Garfinkle-Horowitz-Strominger black holes after shadow observations
• Deciphering signatures of Kerr-Sen black holes in presence of plasma from the Event Horizon Telescope data
• Universality of the Blandford-Znajek emission in stationary and axisymmetric spacetimes