Results 71 to 80 of about 8,619 (233)

Invariant manifolds and the response of spiral arms in barred galaxies

, 2008
The unstable invariant manifolds of the short-period family of periodic orbits around the unstable Lagrangian points $L_1$ and $L_2$ of a barred galaxy define loci in the configuration space which take the form of a trailing spiral pattern.
Aguerri, Buta, C. Efthymiopoulos, C. Kalapotharakos, Contopoulos, Contopoulos, Contopoulos, Contopoulos, Efthymiopoulos, Fux, G. Contopoulos, Grobman, Hammed, Hartman, Kaufmann, Kaufmann, Laurikainen, Lindblad, P. Tsoutsis, Patsis, Patsis, Pfenniger, Pfenniger, Pichardo, Romero-Gomez, Romero-Gomez, Schwarzschild, Smith, Sparke, Tsoutsis, Tully, Voglis, Voglis   +32 more
core   +1 more source

Near-IR photometry of disk galaxies: search for nuclear isophotal twist and double bars [PDF]

, 1997
We present a near-IR, mainly H band, photometry of 72 nearby disk galaxies. The main goal of the survey was to search for isophotal twist inside their nuclear regions.
Axon, David J., Combes, Francoise, Jungwiert, Bruno   +2 more
core   +2 more sources

Characterisation of a Novel Jumbo Lytic Aeromonas dhakensis Bacteriophage P19 and Its Endolysin

Microbial Biotechnology, Volume 19, Issue 1, January 2026.
A jumbo, lytic myovirus phage P19 against multidrug‐resistant (MDR) Aeromonas dhakensis was isolated from river water. P19 demonstrated robust lytic activity, high thermal and pH stability (pH 6–10, up to 60°C), and no genes associated with lysogeny, virulence or antimicrobial resistance. ORF_358 of P19 encodes for T4‐type lysozyme.
Farhat Ansari, Vandan Nagar
wiley   +1 more source

BVRI Surface Photometry of (S+S) Binary Galaxies. I. The data [PDF]

, 2001
We present multicolour broad band ($BVRI$) photometry for a sample of 33 spiral-spiral (S+S) binary galaxies drawn from the Karachentsev Catalogue of Isolated Pairs of Galaxies (KPG).
Avila-Reese, Avila-Reese, Baugh, Bergvall, Burstein, Cardelli, Chevalier, de Jong, Doroshenko, Dultzin-Hacyan, Elmegreen, Godwin, H. M. Hernández-Toledo, Han, Haynes, Hernández-Toledo, Holmberg, I. Puerari, Jansen, Johansson, Junqueira, Karachentsev, Kauffmann, Keel, Kennicutt, Knapen, Lacey, Larson, Laurikainen, Mayer, Metcalfe, Moore, Márquez, Márquez, Prugniel, Prugniel, Reduzzi, Reshetnikov, Roberts, Sofue, Stocke, Sulentic, Whitford, Xu, Zaritsky   +44 more
core   +2 more sources

Identification and Analysis of Galactic Bars in DESI Legacy Imaging Surveys

The Astrophysical Journal
We present a comprehensive study of bar structures in the local universe using data from the DESI Legacy Imaging Surveys. Through isophotal analysis of 232,142 galaxies, we identify bars and classify them into strong and weak categories based on ...
Wenwen Wang, Zhimin Zhou
doaj   +1 more source

Diverse Molecular Structures across the Whole Star-forming Disk of M83: High-fidelity Imaging at 40 pc Resolution

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, Akihiko Hirota, Fumi Egusa, Kazushi Sakamoto, Tsuyoshi Sawada, Mark Heyer, Junichi Baba, Samuel Boissier, Daniela Calzetti, Jennifer Donovan Meyer, Bruce G. Elmegreen, Armando Gil de Paz, Nanase Harada, Luis C. Ho, Masato I. N. Kobayashi, Nario Kuno, Amanda M Lee, Barry F. Madore, Fumiya Maeda, Sergio Martín, Kazuyuki Muraoka, Kouichiro Nakanishi, Sachiko Onodera, Jorge L. Pineda, Nick Scoville, Yoshimasa Watanabe   +25 more
doaj   +1 more source

The Stochastic‐Dissipative Störmer Problem‐Trajectories and Radiation Patterns

Annalen der Physik, Volume 537, Issue 12, December 2025.
We consider charged particle motion and radiation in a dipole magnetic field, in the presence of friction and of stochastic forces. The numerical solutions of the Langevin equation reveal how these forces modify the complex dynamics of particles, and they offer some new insights into the nonlinear processes relevant to planetary radiation belts ...
Tiberiu Harko, Gabriela Raluca Mocanu
wiley   +1 more source

The Potential-Density Phase Shift Method for Determining the Corotation Radii in Spiral and Barred Galaxies [PDF]

, 2006
We have developed a new method for determining the corotation radii of density waves in disk galaxies, which makes use of the radial distribution of an azimuthal phase shift between the potential and density wave patterns.
Arsenault R., Combes F., Contopoulos G., Contopoulos G., Contopoulos G., Contopoulos G., Donner K. J., Egusa F., Friedli D., Lin C. C., Lindblad P. A. B., Lindblad P. A. B., Lucentini J., Lynden-Bell D., Merrifield M. R., Pfenniger D., Pfenniger D., Rautiainen P., Ronald J. Buta, Schwarz M. P., Sparke L. S., Xiaolei Zhang, Zhang X.   +22 more
core   +4 more sources

Gaseous Vortices in Barred Spiral Galaxies

The Astrophysical Journal, 2000
Simulations of the gas flow in a variety of two-dimensional barred spiral galaxies have shown that vortices in the gas appear, when viewed from above, in the corotation frame of the bar. These low-density vortices generally appear at or near the L4 and L5 Lagrangian points.
Martin N. England, J. H. Hunter, Jr., G. Contopoulos   +2 more
openaire   +1 more source

Characterization of Pilin A and Thioredoxin A Mutant Strains of Acinetobacter baumannii, From a Transposon Insertion Library, for Pili Production and Virulence‐Associated Properties

MicrobiologyOpen, Volume 14, Issue 6, December 2025.
Acinetobacter baumannii transposon insertion mutant strains ΔpilA and ΔtrxA display marked reductions of surface pili. The PilA (a major pilin protein) and TrxA (thioredoxin A) deficient bacteria also show attenuation in pathogenesis including the reduction of intestinal bacterial attachment, increased phagocytic uptake and decreased mortality from ...
Jadelynn Aki, Sara B. Papp, Bayley Polk, Sean Jeffreys, Megan P. Tompkins, Anwar A. Kalalah, Mark Eppinger, Guoquan Zhang, M. N. Guentzel, James P. Chambers, Bernard P. Arulanandam, Jieh‐Juen Yu   +11 more
wiley   +1 more source