99 citations · 285 across the 21 of their papers we have counts for
22 papers
Microscopic primordial black holes as macroscopic dark matter from large extra dimensions
Giuseppe Filiberto Vitale, Gaetano Lambiase, Tanmay Kumar Poddar +1
We study the coupled cosmological evolution of primordial black holes (PBHs) and radiation in the Arkani-Hamed-Dimopoulos-Dvali (ADD) framework with large extra dimensions and…
Gamma-Ray Bursts as an Independent High-Redshift Probe of Dark Energy
Maria Giovanna Dainotti, Aleksander Łukasz Lenart, Biagio De Simone +6
Testing the CDM model requires cosmological probes spanning the wide redshift interval between Type Ia Supernovae (SNe Ia, ) and the Cosmic Microwave Background (C…
Ultralight time-oscillating scalars from magnetized compact stars: electrophilic radiation and photon propagation effects
Tanmay kumar Poddar, Gaetano Lambiase
Ultralight scalars with electrophilic couplings to the time-dependent Goldreich-Julian charge density of magnetized compact stars can be radiated from their magnetospheres, contrib…
Exorcising ghosts with gravitational waves: cases of ghostful and ghost-free fourth-order gravity
Gaetano Lambiase, Shinji Mukohyama, Tanmay Kumar Poddar +1
General Relativity (GR) is an effective field theory valid in the infrared regime. Quadratic curvature extensions intended to probe ultraviolet physics generically propagate a mass…
Gravitational Signatures of Axion Dark Matter via Parity-Violating Interactions
Marco Figliolia, Francesco Grippa, Gaetano Lambiase +1
We investigate axion-like particles coupled to gravity through a parity-violating Chern-Simons (CS) interaction. In this framework, axion dark matter (DM) can decay into pairs of c…
Impact of the cosmic neutrino background on black hole superradiance
Gaetano Lambiase, Tanmay Kumar Poddar, Luca Visinelli
We assess the effect of the Cosmic Neutrino Background (CB) on superradiant instabilities caused by an ultralight scalar field around spinning black holes (BHs). When the scalar…
Primordial gravitational waves from spontaneous Lorentz symmetry breaking
Mohsen Khodadi, Gaetano Lambiase, Leonardo Mastrototaro +1
We study the effect of Spontaneous Lorentz Symmetry Breaking (SLSB) on Primordial Gravitational Waves (PGWs) generated during inflation. The SLSB is induced by a time-like Bumblebe…
Limits on dark matter, ultralight scalars, and cosmic neutrinos with gyroscope spin and precision clocks
Sara Rufrano Aliberti, Gaetano Lambiase, Tanmay Kumar Poddar
Dark matter (DM) within the solar system induces deviations in the geodetic drift of gyroscope spin due to its gravitational interaction. Assuming a constant DM density as a minima…
Pulsar Kick: Status and Perspective
Gaetano Lambiase, Tanmay Kumar Poddar
The high speeds seen in rapidly rotating pulsars after supernova explosions present a longstanding puzzle in astrophysics. Numerous theories have been suggested over the years to e…
Searching for New Physics in Ultradense Environment: a Review on Dark Matter Admixed Neutron Stars
Francesco Grippa, Gaetano Lambiase, Tanmay Kumar Poddar
Neutron Stars (NSs), among the densest objects in the Universe, are exceptional laboratories for investigating Dark Matter (DM) properties. Recent theoretical and observational dev…
Scalar and vector dark matter admixed neutron stars with linear and quadratic couplings
Francesco Grippa, Gaetano Lambiase, Tanmay Kumar Poddar
We investigate the effects of dark scalar- and vector-mediated interactions on dark matter admixed neutron stars, employing the two-fluid formalism. We adopt three different nuclea…
Constraints on electrophilic scalar coupling from rotating magnetized stars and effects of cosmic neutrino background
Gaetano Lambiase, Tanmay Kumar Poddar
An ultralight electrophilic scalar field can produce a long-range Yukawa-like spatial profile around a rotating, magnetized star when coupled to the constant number density of elec…
Constraints on Tsallis Cosmology from Big Bang Nucleosynthesis and the Relic Abundance of Cold Dark Matter Particles
Petr Jizba, Gaetano Lambiase
By employing Tsallis' extensive but non-additive -entropy, we formulate the first two laws of thermodynamics for gravitating systems. By invoking Carathéodory's principle, we pa…
Pulsar kicks in ultralight dark matter background induced by neutrino oscillation
Gaetano Lambiase, Tanmay Kumar Poddar
The interaction of neutrinos with ultralight scalar and vector dark matter backgrounds induce a modification of the neutrino dispersion relation. The effects of this modification a…
Proceedings to the 25th International Workshop "What Comes Beyond the Standard Models", July 4 -- July 10, 2022, Bled, Slovenia
R. Bernabei, P. Belli, A. Bussolotti +51
Proceedings for our meeting ``What comes beyond the Standard Models'', which covered a broad series of subjects.
Listening to dark sirens from gravitational waves:\it{Combined effects of fifth force, ultralight particle radiation, and eccentricity}
Tanmay Kumar Poddar, Anish Ghoshal, Gaetano Lambiase
We derive in detail the orbital period loss of a compact binary system in presence of a fifth force and radiation of ultralight particles for a general eccentric Keplerian orbit. W…
Near-inflection point inflation and production of dark matter during reheating
Anish Ghoshal, Gaetano Lambiase, Supratik Pal +2
We study slow roll single field inflationary scenario and the production of non-thermal fermionic dark matter, together with standard model Higgs, during reheating. For the inflati…
Tsallis cosmology and its applications in dark matter physics with focus on IceCube high-energy neutrino data
Petr Jizba, Gaetano Lambiase
In this paper we employ a recent proposal of C. Tsallis and formulate the first law of thermodynamics for gravitating systems in terms of the extensive but non-additive entropy. We…
Inflection-point Inflation and Dark Matter Redux
Anish Ghoshal, Gaetano Lambiase, Supratik Pal +2
We investigate for viable models of inflation that can successfully produce dark matter (DM) from inflaton decay process, satisfying all the constraints from Cosmic Microwave Backg…
Constraints on Tsallis Cosmology from Big Bang Nucleosynthesis and Dark Matter Freeze-out
Anish Ghoshal, Gaetano Lambiase
We consider Tsallis cosmology as an approach to thermodynamic gravity and derive the bound on the Tsallis parameter to be by using the constraints derived from the formation…
Primordial Gravitational Wave Signals in Modified Cosmologies
Nicolás Bernal, Anish Ghoshal, Fazlollah Hajkarim +1
Modified expansion rates in the early Universe prior to big bang nucleosynthesis are common in modified gravity theories, and can have a significant impact on the generation of dar…
Constraining f(T) teleparallel gravity by Big Bang Nucleosynthesis
S. Capozziello, G. Lambiase, E. N. Saridakis
We use BBN observational data on primordial abundance of to constrain f(T) gravity. The three most studied viable models, namely the power law, the exponential and…