417 citations · 5.2k across the 148 of their papers we have counts for
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Gravitational Wave Diffractive Images Reveal the Structure of Astrophysical Objects
Han Gil Choi, Sunghoon Jung, Volodymyr Takhistov
Scattering patterns encode the structure of extended objects, as demonstrated by charged particle scattering on atomic nuclei. Gravitational wave (GW) diffraction offers an analogo…
Universal Suppression of Gravitational Waves from Black Hole Evaporation Dynamics
Xin-Chen He, Xiao-Han Ma, Misao Sasaki +1
Evaporating black holes can leave distinct imprints on gravitational wave (GW) backgrounds. We show that black hole populations with finite width mass distributions exhibit a unive…
Multimessenger Constraints on Supermassive Dark Stars and Their Black Hole Remnants
Marco Manno, Thomas Schwemberger, Volodymyr Takhistov
Dark matter (DM) annihilation can power the first generation of stars as long lived dark stars (DSs) that grow to supermassive scales and event…
Primordial Black Hole Formation from Power Spectrum with Finite-width
Shi Pi, Misao Sasaki, Volodymyr Takhistov +1
Primordial black holes (PBHs) can form from gravitational collapse of large overdensities in the early Universe, giving rise to rich phenomena in astrophysics and cosmology. We dev…
Primordial Black Hole Mergers as Probes of Dark Matter in Galactic Center
Qianhang Ding, Minxi He, Volodymyr Takhistov
Primordial black holes (PBHs) from the early Universe that can contribute to dark matter (DM) abundance have been linked to gravitational wave observations. Super-massive black hol…
Dual Gravitational Wave Signatures of Instant Preheating
Wei-Yu Hu, Kazunori Nakayama, Volodymyr Takhistov +1
In the instant preheating scenario efficient particle production occurs immediately following the period of inflationary expansion in the early Universe. We demonstrate that instan…
New Light on Dark Extended Lenses with the Roman Space Telescope
William DeRocco, Nolan Smyth, Volodymyr Takhistov
The Roman Space Telescope's Galactic Bulge Time Domain Survey will constitute the most sensitive microlensing survey of the Galactic Bulge to date, opening up new opportunities to…
Coexistence Test of Primordial Black Holes and Particle Dark Matter from Diffractive Lensing
Han Gil Choi, Sunghoon Jung, Philip Lu +1
If dark matter (DM) consists of primordial black holes (PBHs) and particles simultaneously, PBHs are generically embedded within particle DM halos. Such ``dressed PBHs'' (dPBHs) ar…
Axion-like Universal Gravitational Wave Interpretation of Pulsar Timing Array Data
Kaloian D. Lozanov, Shi Pi, Misao Sasaki +2
Formation of cosmological solitons is generically accompanied by production of gravitational waves (GWs), with a universal GW background expected at frequency scales below that of…
Universal Gravitational Waves from Interacting and Clustered Solitons
Kaloian D. Lozanov, Misao Sasaki, Volodymyr Takhistov
Causal soliton formation (e.g. oscillons, Q-balls) in the primordial Universe is expected to give rise to a universal gravitational wave (GW) background, at frequencies smaller tha…
Primordial Black Hole Neutrinogenesis of Sterile Neutrino Dark Matter
Muping Chen, Graciela B. Gelmini, Philip Lu +1
Sterile neutrinos are well-motivated and actively searched for new particles that would mix with the active neutrinos. We study their phenomenology when they are produced in the ev…
Universal Gravitational Wave Signatures of Cosmological Solitons
Kaloian D. Lozanov, Misao Sasaki, Volodymyr Takhistov
Cosmological solitonic objects such as monopoles, cosmic strings, domain walls, oscillons and Q-balls often appear in theories of the early Universe. We demonstrate that such scena…
Signatures of a High Temperature QCD Transition in the Early Universe
Philip Lu, Volodymyr Takhistov, George M. Fuller
Beyond Standard Model extensions of QCD could result in quark and gluon confinement occurring well above a temperature of GeV. These models can also alter the order of the QC…
Revealing Dark Matter Dress of Primordial Black Holes by Cosmological Lensing
Masamune Oguri, Volodymyr Takhistov, Kazunori Kohri
Stellar-mass primordial black holes (PBHs) from the early Universe can directly contribute to the gravitational wave (GW) events observed by LIGO, but can only comprise a subdomina…
Enhanced Gravitational Waves from Inflaton Oscillons
Kaloian D. Lozanov, Volodymyr Takhistov
In broad classes of inflationary models the period of accelerated expansion is followed by fragmentation of the inflaton scalar field into localized, long-lived and massive oscillo…
Establishing the Non-Primordial Origin of Black Hole-Neutron Star Mergers
Misao Sasaki, Volodymyr Takhistov, Valeri Vardanyan +1
Primordial black holes (PBHs) from the early Universe constitute an attractive dark matter candidate. First detections of black hole-neutron star (BH-NS) candidate gravitational wa…
Exploring Evaporating Primordial Black Holes with Gravitational Waves
Guillem Domènech, Volodymyr Takhistov, Misao Sasaki
Primordial black holes (PBHs) from the early Universe have been connected with the nature of dark matter and can significantly affect cosmological history. We show that coincidence…
Testing Stochastic Gravitational Wave Signals from Primordial Black Holes with Optical Telescopes
Sunao Sugiyama, Volodymyr Takhistov, Edoardo Vitagliano +3
Primordial black holes (PBHs) can constitute the predominant fraction of dark matter (DM) if PBHs reside in the currently unconstrained "sublunar" mass range. PBHs originating from…
Gas Heating from Spinning and Non-Spinning Evaporating Primordial Black Holes
Ranjan Laha, Philip Lu, Volodymyr Takhistov
Primordial black holes (PBHs) from the early Universe constitute a viable dark matter (DM) candidate and can span many orders of magnitude in mass. Light PBHs with masses around $1…
Constraining Primordial Black Holes with Dwarf Galaxy Heating
Philip Lu, Volodymyr Takhistov, Graciela B. Gelmini +3
Black holes formed in the early universe, prior to the formation of stars, can exist as dark matter and also contribute to the black hole merger events observed in gravitational wa…
Exploring Primordial Black Holes from the Multiverse with Optical Telescopes
Alexander Kusenko, Misao Sasaki, Sunao Sugiyama +3
Primordial black holes (PBHs) are a viable candidate for dark matter if the PBH masses are in the currently unconstrained "sublunar" mass range. We revisit the possibility that PBH…
New Venues in Formation and Detection for Primordial Black Hole Dark Matter
Volodymyr Takhistov
Primordial black holes (PBHs) are not as exotic as once thought and constitute a compelling non-particle dark matter (DM) candidate. We present a novel general PBH formation mechan…
Analytic Description of Primordial Black Hole Formation from Scalar Field Fragmentation
Eric Cotner, Alexander Kusenko, Misao Sasaki +1
Primordial black hole (PBH) formation is a more generic phenomenon than was once thought. The dynamics of a scalar field in inflationary universe can produce PBHs under mild assump…
Gravitational wave probes of dark matter: challenges and opportunities
Gianfranco Bertone, Djuna Croon, Mustafa A. Amin +9
In this white paper, we discuss the prospects for characterizing and identifying dark matter using gravitational waves, covering a wide range of dark matter candidate types and sig…