A Nonrepeating Fast Radio Burst in a Dwarf Host Galaxy [PDF]
The Astrophysical Journal, 2023 We present the discovery of an as yet nonrepeating fast radio burst (FRB), FRB 20210117A, with the Australian Square Kilometre Array Pathfinder (ASKAP), as a part of the Commensal Real-time ASKAP Fast Transients Survey.
Shivani Bhandari +16 more
doaj +2 more sources
Proton Acceleration with Relativistic Electromagnetic Shock. [PDF]
Adv Sci (Weinh)New Ion Acceleration Mechanism! A novel cosmic‐ray proton acceleration mechanism is proposed, where relativistic electromagnetic shocks accelerate protons transversely. Hamiltonian analysis yields a scaling law linking the proton energy to the minimum longitudinal thickness of the shock.
Xiao T +5 more
europepmc +2 more sources
Searching for nearby diffuse dwarf galaxies in the COSMOS field [PDF]
Frontiers in Astronomy and Space SciencesIt remains challenging to systematically survey nearby diffuse dwarf galaxies and address the formation mechanism of this population distinguishing from regular ones.
Dong Dong Shi +7 more
doaj +2 more sources
Dehnen halo effect on a black hole in an ultra-faint dwarf galaxy [PDF]
Journal of Cosmology and Astroparticle Physics, 2022 There had been recent advancement toward the detection of ultra-faint dwarf galaxies, which may serve as a useful laboratory for dark matter exploration since some of them contains almost 99% of pure dark matter. The majority of these galaxies contain no
R. C. Pantig, A. Övgün
semanticscholar +1 more source
Resolved Dwarf Galaxy Searches within ∼5 Mpc with the Vera Rubin Observatory and Subaru Hyper Suprime-Cam [PDF]
Astrophysical Journal, 2021 We present a preview of the faint dwarf galaxy discoveries that will be possible with the Vera C. Rubin Observatory and Subaru Hyper Suprime-Cam in the next decade.
B. Mutlu-Pakdİl +9 more
semanticscholar +1 more source
An extended halo around an ancient dwarf galaxy [PDF]
Nature Astronomy, 2020 The Milky Way is surrounded by dozens of ultrafaint (107 M☉, consistent with a generalized Navarro–Frenk–White density profile. The extended nature of Tucana II suggests that it may have undergone strong bursty feedback or been the product of an early ...
A. Chiti +9 more
semanticscholar +1 more source
Formation of Transitional cE/UCD Galaxies through Massive/Dwarf Disc Galaxy Mergers
Galaxies, 2023 The dynamics of the merger of a dwarf disc galaxy with a massive spiral galaxy of the Milky Way type were studied in detail. The remnant of such interaction after numerous crossings of the satellite through the disc of the main galaxy was a compact ...
Alexander V. Khoperskov +2 more
doaj +1 more source
Constraining Primordial Black Holes with Dwarf Galaxy Heating [PDF]
, 2020 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 waves.
P. Lu +5 more
semanticscholar +1 more source
Dependence of stellar substructures in M31 type galaxy on satellite morphology in galaxy mergers [PDF]
Serbian Astronomical Journal, 2022 Stellar streams and shells are observed in halos of spiral galaxies. In this paper, we investigated the formation of these structures due to mergers between the host spiral galaxy and its dwarf satellite galaxies.
Milošević S.
doaj +1 more source
The Local Group on FIRE: dwarf galaxy populations across a suite of hydrodynamic simulations [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We present a new set of high-resolution hydrodynamic cosmological zoom-in simulations that apply the Feedback In Realistic Environments physics to both Local Group (LG)-like and isolated Milky Way (MW)-like volumes (10 host systems in total with a ...
S. Garrison-Kimmel +10 more
semanticscholar +1 more source