Results 71 to 80 of about 51,405 (265)

Evidence for universal structure in galactic halos [PDF]

, 1999
The late infall of dark matter onto a galaxy produces structure (such as caustics) in the distribution of dark matter in the halo. We argue that such structure is likely to occur generically on length scales proportional to $l \sim t_0 v_{rot}$, where ...
C. Copi, C. Hagmann, D. H. Rogstad, E. Bertschinger, J. A. Filmore, J. E. Gunn, K. G. Begeman, N. Martimbeau, P. Sikivie, P. Sikivie, P. Sikivie, P. Sikivie, P. Sikivie, Pierre Sikivie, R. H. Sanders, V. C. Rubin, William H. Kinney   +16 more
core   +2 more sources

Large scale hydrodynamic modes of oscillations in gaseous disks of flat galaxies with a kink on rotation curves

Open Astronomy, 2018
The properties of unstable large-scale hydrodynamic (HD) modes of oscillations in the gaseous disk of a flat galaxy with a rotation curve having a velocity jump in the inner region of the disk are numerically investigated.
Torgashin Yury, Omurkanov Turgunbek
doaj   +1 more source

Galaxy rotation curves and dissipation

The Astrophysical Journal, 1989
Une theorie est proposee pour expliquer la tendance des galaxies a disque a manifester des vitesses rotationnelles constantes en considerant l'hypothese suivant laquelle la dissipation d'energie est le facteur principal qui determine les formes finales des galaxies a disque.
openaire   +1 more source

A Degradable Bioinspired Flier with Aerogel‐Based Colorimetric Sensors for Environmental Monitoring

Advanced Science, EarlyView.
Biodegradable fliers are developed inspired by Tipuana tipu samaras, integrating cellulose nanocrystal aerogel (CNCa) sensors loaded with natural dyes for pH and ammonia detection. The lightweight, degradable fliers mimic natural morphology and aerodynamics, offering an eco‐friendly, scalable solution for in situ environmental monitoring after passive ...
Gianpaolo Gallo, Ruowen Tu, Carlo Filippeschi, Stefano Mariani, Barbara Mazzolai   +4 more
wiley   +1 more source

Decoding the Galactic Twirl: The Downfall of Milky Way–Mass Galaxy Rotation Curves in the FIRE Simulations

The Astrophysical Journal
Recent measurements of the Milky Way rotation curve found a sharp decline at around 15–20 kpc from the center of the Galaxy, suggesting that the Galactic dark matter halo is much less massive than predicted by other dynamical tracers.
Xiaowei Ou, Lina Necib, Andrew Wetzel, Anna Frebel, Jeremy Bailin, Micah Oeur   +5 more
doaj   +1 more source

Central Rotation Curves of Spiral Galaxies [PDF]

The Astrophysical Journal, 1999
We present high-resolution central-to-outer rotation curves for Sb, SBb, Sc, and SBc galaxies. We discuss their general characteristics, particularly their central behavior, as well as dependencies on morphological types, activity, and peculiarity. The rotation curves generally show a steep nuclear rise, and high-velocity central rotation, followed by ...
Sofue, Y., Tutui, Y., Honma, M., Tomita, A., Takamiya, T., Koda, J., Takeda, Y.   +6 more
openaire   +2 more sources

Solid Harmonic Wavelet Bispectrum for Image Analysis

Advanced Science, EarlyView.
The Solid Harmonic Wavelet Bispectrum (SHWB), a rotation‐ and translation‐invariant descriptor that captures higher‐order (phase) correlations in signals, is introduced. Combining wavelet scattering, bispectral analysis, and group theory, SHWB achieves interpretable, data‐efficient representations and demonstrates competitive performance across texture,
Alex Brown, Mathilda Avirett‐Mackenzie, Carolin Villforth, Georgios Exarchakis   +3 more
wiley   +1 more source

Modeling vertical structure in circular velocity of spiral galaxy NGC 4244

, 2015
We study the vertical gradient in azimuthal velocity of spiral galaxy NGC 4244 in a thin disk model. With surface density accounting for the rotation curve, we model the gradient properties in the approximation of quasi-circular orbits and find the ...
Bratek, Łukasz, Jałocha, Joanna, Kutschera, Marek, Sikora, Szymon   +3 more
core   +1 more source

Substituent‐Based Modulation of Self‐Assembly and Immunogenicity of Amphipathic Peptides

Advanced Science, EarlyView.
This study systematically investigates how positional and subtle changes, such as substituents on the phenyl ring attached to short amphipathic peptides, influence their self‐assembly, fibril morphology, and immunogenic responses. ABSTRACT Self‐assembled peptide‐based biomaterials provide versatile platforms for biomedical uses, featuring customizable ...
Anirban Das, Ushasi Pramanik, Elise M. Brown, Chih‐Yun Liu, Huan Gong, Jonathan Fascetti, Mark Gibson, Samuel Stealey, Silviya P. Zustiak, Cory Berkland, Piyoosh Sharma, Meredith E. Jackrel, Mark A. White, Jai S. Rudra   +13 more
wiley   +1 more source

Measurement of the Mass and Stellar Population Distribution in M82 with the LBT

, 2012
We present a K-band spectroscopic study of the stellar and gas kinematics, mass distribution, and stellar populations of the archetypical starburst galaxy M82.
Cottrell, Draine, Förster Schreiber, Förster Schreiber, Gerke, Goetz, Johnny P. Greco, Konstantopoulos, Mayall, Mayya, McCrady, McKeith, McKeith, Miwa, Noguchi, Oliva, Origlia, Paul Martini, Puxley, Saito, Sakai, Sanders, Sofue, Todd A. Thompson, Westmoquette   +24 more
core   +1 more source