Primordial black hole detection through diffractive microlensing

  title={Primordial black hole detection through diffractive microlensing},
  author={Tayebe Naderi and Ahmad Mehrabi and Sohrab Rahvar},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
Recent observations of the gravitational wave by LIGO motivates investigations for the existence of Primordial Black Holes (PBHs) as a candidate for the dark matter. We propose quasar gravitational microlensing observations in Infrared to the sub-millimeter wavelengths by sub-lunar PBHs as lenses. The advantage of observations in the longer wavelengths is that the Schwarzschild radius of the lens is of the order of the wavelength (i.e. $R_{\rm sch}\simeq \lambda$), so the wave optics features… 
3 Citations

Figures and Tables from this paper

On the wave optics effect on primordial black hole constraints from optical microlensing search
Microlensing of stars, e.g. in the Galactic bulge and Andromeda galaxy (M31), is among the most robust, powerful method to constrain primordial black holes (PBHs) that are a viable candidate of
Sublunar-mass primordial black holes from closed axion domain walls
  • S. Ge
  • Physics
    Physics of the Dark Universe
  • 2020
Light deflection by squashed Kaluza-Klein black holes in a plasma medium
We study motions of photons in an unmagnetized cold homogeneous plasma medium in the five-dimensional charged static squashed Kaluza-Klein black hole spacetime. In this case, a photon behaves as a


Diffractive microlensing – II. Substellar disc and halo objects
Microlensing is generally studied in the geometric optics limit. However, diffraction may be important when nearby substellar objects' lens occult distant stars. In particular the effects of
Limits on the Mass and Abundance of Primordial Black Holes from Quasar Gravitational Microlensing
The idea that dark matter can be made of intermediate-mass primordial black holes (PBHs) in the 10 M ⊙ M 200 M ⊙ range has recently been reconsidered, particularly in the light of the detection of
Studying wave optics in the light curves of exoplanet microlensing
We study the wave optics features of gravitational microlensing by a binary lens composed of a planet and a parent star. In this system, the source star near the caustic line produces a pair of
Gravitational Microlensing I: A Unique Astrophysical Tool
In this article we review the astrophysical application of gravitational microlensing. After introducing the history of gravitational lensing, we present the key equations and concept of
Applications of Microlensing to Stellar Astrophysics
Over the past decade, microlensing has developed into a powerful tool to study stellar astrophysics, especially stellar atmospheres, stellar masses, and binarity. I review this progress. Stellar
Geometrical optics provides an excellent description for quasar images crossing caustics which are formed by gravitational microlensing of objects like Q2237+0305. Within this approximation the
Transient Weak-Lensing by Cosmological Dark Matter Microhaloes
We study the time variation of the apparent flux of cosmological point sources due to the transient weak lensing by dark matter microhaloes. Assuming a transverse motion of microhaloes with respect
Effect of Primordial Black Holes on the Cosmic Microwave Background and Cosmological Parameter Estimates
We investigate the effect of nonevaporating primordial black holes (PBHs) on the ionization and thermal history of the universe. X-rays emitted by gas accretion onto PBHs modify the cosmic
Probing the atmosphere of a solar-like star by galactic microlensing at high magnification
We report a measurement of limb darkening of a solar-like star in the very high magnification microlensing event MOA 2002–BLG–33. A 15 hour deviation from the light curve profile expected for a
Diffractive Microlensing III: Astrometric Signatures
Gravitational lensing is generally treated in the geometric optics limit; however, when the wavelength of the radiation approaches or exceeds the Schwarzschild radius of the lens, diffraction becomes