Results 21 to 30 of about 355,593 (244)
The Interstellar Medium of Dwarf Galaxies
Galaxies, 2022 Dwarf galaxies are by far the most numerous galaxies in the Universe, showing properties that are quite different from those of their larger and more luminous cousins. This review focuses on the physical and chemical properties of the interstellar medium
Christian Henkel +2 more
doaj +1 more source
The signature of primordial black holes in the dark matter halos of galaxies [PDF]
Astronomy & Astrophysics, 2020 Aims. The aim of this paper is to investigate the claim that stars in the lensing galaxy of a gravitationally lensed quasar system can always account for the observed microlensing of the individual quasar images. Methods.
M. Hawkins
semanticscholar +1 more source
The Astrophysical Journal Letters, 2023 The protoclusters in the epoch of reionization, traced by galaxy overdensity regions, are ideal laboratories for studying the process of stellar assembly and cosmic reionization.
T. Hashimoto +22 more
doaj +1 more source
Galaxy bias and primordial non-Gaussianity [PDF]
Journal of Cosmology and Astroparticle Physics, 2015 37 pages, 2 figures; v2: minor clarifications in Section ...
Assassi, V., Baumann, D., Schmidt, F.
openaire +5 more sources
Learning to concentrate: multi-tracer forecasts on local primordial non-Gaussianity with machine-learned bias [PDF]
Journal of Cosmology and Astroparticle Physics, 2023 Local primordial non-Gaussianity (LPNG) is predicted by many non-minimal models of inflation, and creates a scale-dependent contribution to the power spectrum of large-scale structure (LSS) tracers, whose amplitude is characterized by bϕ .
J. Sullivan, Tijan Prijon, U. Seljak
semanticscholar +1 more source
Taming assembly bias for primordial non-Gaussianity [PDF]
Journal of Cosmology and Astroparticle Physics, 2023 Primordial non-Gaussianity of the local type induces a strong scale-dependent bias on the clustering of halos in the late-time Universe. This signature is particularly promising to provide constraints on the non-Gaussianity parameter f NL from galaxy ...
E. Fondi +9 more
semanticscholar +1 more source
Galaxy Quenching from Cosmic Web Detachment
The Open Journal of Astrophysics, 2019 We propose the Cosmic Web Detachment (CWD) model, a framework to interpret the star-formation history of galaxies in a cosmological context. The CWD model unifies several starvation mechanisms known to disrupt or stop star formation into one single ...
Miguel A. Aragon Calvo +2 more
doaj +2 more sources
Dwarf Galaxy Formation with and without Dark Matter–Baryon Streaming Velocities
The Astrophysical Journal, 2023 We study how supersonic streaming velocities of baryons relative to dark matter—a large-scale effect imprinted at recombination and coherent over ∼3 Mpc scales—affect the formation of dwarf galaxies at z ≳ 5.
Anna T. P. Schauer +6 more
doaj +1 more source
Magnetic Fields in Primordial Galaxies
, 2021 Magnetic fields play a vital role in numerous astrophysical processes such as star formation and the interstellar medium. In particular, their role in the formation and evolution of galaxies is not well understood. This paper presents high-resolution magnetohydrodynamic (MHD) simulations performed with GIZMO to investigate the effect of magnetic fields
Chiu, Huai-Hsuan, Chen, Ke-Jung
openaire +2 more sources
Cusp-to-core transition in low-mass dwarf galaxies induced by dynamical heating of cold dark matter by primordial black holes [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We performed a series of high-resolution N-body simulations to examine whether dark matter candidates in the form of primordial black holes (PBHs) can solve the cusp–core problem in low-mass dwarf galaxies.
P. Boldrini +5 more
semanticscholar +1 more source