Results 11 to 20 of about 688,478 (251)
Elevated Rates of Tidal Disruption Events in Active Galactic Nuclei [PDF]
The Astrophysical JournalAdvances in time domain astronomy have produced a growing population of flares from galactic nuclei, including both tidal disruption events (TDEs) and flares in active galactic nuclei (AGN).
Karamveer Kaur, Nicholas C. Stone
doaj +2 more sources
Quasinormal modes and late time tails of perturbation fields on a Schwarzschild-like black hole with a global monopole in the Einstein-bumblebee theory [PDF]
Science China Physics Mechanics and Astronomy, 2023 In this paper we complete a systematic study on quasinormal modes (QNMs) and late time tails for scalar, Dirac and Maxwell fields on a spherically symmetric Schwarzschild-like black hole with a global monopole in the Einstein-bumblebee theory.
Xiaolin Zhang +2 more
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Relativistic Perturbation Theory for Black-Hole Boson Clouds. [PDF]
Physical Review Letters, 2023 We develop a relativistic perturbation theory for scalar clouds around rotating black holes. We first introduce a relativistic product and corresponding orthogonality relation between modes, extending a recent result for gravitational perturbations.
Enrico Cannizzaro +3 more
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The cosmic web from perturbation theory [PDF]
Astronomy & Astrophysics, 2023 Analysing the large-scale structure (LSS) in the Universe with galaxy surveys demands accurate structure formation models. Such models should ideally be fast and have a clear theoretical framework in order to rapidly scan a variety of cosmological ...
Fumiya Kitaura +3 more
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Cold dark matter protohalo structure around collapse: Lagrangian cosmological perturbation theory versus Vlasov simulations [PDF]
Astronomy & Astrophysics, 2021 We explore the structure around shell-crossing time of cold dark matter protohaloes seeded by two or three crossed sine waves of various relative initial amplitudes, by comparing Lagrangian perturbation theory (LPT) up to 10th order to high-resolution ...
S. Saga, A. Taruya, S. Colombi
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Grid-based calculations of redshift-space matter fluctuations from perturbation theory: UV sensitivity and convergence at the field level [PDF]
Physical Review D, 2021 Atsushi Taruya, 2 Takahiro Nishimichi, 2 and Donghui Jeong 4 Center for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan Kavli Institute for the Physics and Mathematics of the Universe, Todai ...
A. Taruya, T. Nishimichi, D. Jeong
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Closed-form perturbation theory in the restricted three-body problem without relegation [PDF]
Celestial mechanics & dynamical astronomy, 2021 We propose a closed-form normalization method suitable for the study of the secular dynamics of small bodies in heliocentric orbits perturbed by the tidal potential of a planet with orbit external to the orbit of the small body.
I. Cavallari, C. Efthymiopoulos
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Deformed Schwarzschild horizons in second-order perturbation theory: Mass, geometry, and teleology [PDF]
Physical Review D, 2021 Riccardo Bonetto, Adam Pound, and Zeyd Sam 3 Bernoulli Institute for Mathematics, Computer Science and Artificial Intelligence, University of Groningen, Nijenborgh 9, 9747AG, Groningen, The Netherlands School of Mathematical Sciences and STAG Research ...
Riccardo Bonetto, A. Pound, Zeyd Sam
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Open Astronomy, 2022 In this work, we consider small-scale sectorial perturbation modes in a disk-like model of a radially nonstationary spiral galaxy in order to study the gravitational instabilities of these modes.
Jakhongirbek Ganiev, S. Nuritdinov
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Frontiers in Astronomy and Space Sciences, 2021 Vibrational spectroscopy represents an active frontier for the identification and characterization of molecular species in the context of astrochemistry and astrobiology. As new missions will provide more data over broader ranges and at higher resolution,
Qin Yang +3 more
semanticscholar +1 more source