Results 41 to 50 of about 646 (172)
Formation of the spiral structure in SB galaxies [PDF]
Astronomy Letters, 2001 We consider a scenario of formation of the spiral structure in barred galaxies. This scenario includes the new non-resonant mechanism of elongation of spirals, due to the characteristic behaviour of the gravitational potential beyond the principal spiral arms.
Evgenii V. Polyachenko +1 more
openaire +3 more sources
Spirals and Rings in Barred Galaxies by the ROTASE Model
International Journal of Physics, 2021 This paper extends the application of the ROTASE model for the formation of spiral arms of disc galaxies, questions and confusions from readers about this model are addressed. The optical trail effect behind the spiral arm rotation is the natural consequence of the model.
openaire +4 more sources
Stellar dynamics around transient co-rotating spiral arms
EPJ Web of Conferences, 2012 Spiral density wave theory attempts to describe the spiral pattern in spiral galaxies in terms of a long-lived wave structure with a constant pattern speed in order to avoid the winding dilemma.
Cropper M., Grand R.J.J., Kawata D.
doaj +1 more source
The Astrophysical Journal, 2023 We present a detailed analysis of the structure of the Local Group flocculent spiral galaxy M33, as measured using the Panchromatic Hubble Andromeda Treasury Triangulum Extended Region (PHATTER) survey. Leveraging the multiwavelength coverage of PHATTER,
Adam Smercina +16 more
doaj +1 more source
A New Statistical Analysis of the Morphology of Spiral Galaxies
The Astronomical JournalMorphology is the starting point for understanding galaxies. Elmegreen et al. classified spiral galaxies into flocculent, multiple-arm, and grand-design galaxies based on the regularity of their spiral arm structure.
Junye Wei +6 more
doaj +1 more source
Advanced Science, EarlyView.This review spotlights key advances in chiral halide perovskite materials and devices, covering device architectures, fabrication methods, and emerging applications like circularly polarized light functions, neuromorphic computing, and spintronics. It explores structure‐property relationships and chirality transfer mechanisms, discusses challenges in ...
Qi Liu, Hui Ren, Qi Wei, Mingjie Li
wiley +1 more source
Staphylococcus aureus AgrA Modulators From South African Antimicrobial Plants
Chemistry &Biodiversity, EarlyView.The study workflow utilized validated in silico [molecular docking, fingerprinting, pharmacokinetics prediction, molecular dynamics (MD) simulation, ligand‐protein contact maps] tools to bioprospect a wide variety of metabolites surveyed from South African plants with antimicrobial activities, and target them against the key S.
Christiana Eleojo Aruwa, Saheed Sabiu
wiley +1 more source
The Abundance and Properties of Barred Galaxies out to z ∼ 4 Using JWST CEERS Data
The Astrophysical JournalWe present the first estimate of the observed fraction and properties of bars out to z ∼ 4 using JWST CEERS NIRCam images. We analyze 1770 galaxies with M _⋆ > 10 ^10 M _⊙ at 0.5 ≤ z ≤ 4 and identify barred galaxies from 839 moderately inclined disk ...
Yuchen Guo +28 more
doaj +1 more source
ChemPhysChem, EarlyView.In bulk carbonic acid (e.g., in interstellar icy dust grains) cluster formation produces two distinct UV‐Vis spectral features redshifted by ≈2 eV (25 nm) and by ≈5 eV (80 nm) compared to gas phase single molecule carbonic acid 's adiabatic ionization energy. Theory and experiment were used to investigate the origin of these shifts.
Dennis F. Dinu +7 more
wiley +1 more source
The Astrophysical Journal, 2023 We present Atacama Large Millimeter/submillimeter Array (ALMA) imaging of molecular gas across the full star-forming disk of the barred spiral galaxy M83 in CO( J = 1–0).
Jin Koda +25 more
doaj +1 more source