Results 61 to 70 of about 7,946 (225)

Dynamically Driven Evolution of Molecular Gas in the Barred Spiral Galaxy M83 Traced by CO J = 2–1/1–0 Line Ratio Variations

The Astrophysical Journal
We show the variations of the CO J = 2–1/1–0 line ratio ( R _21/10 ) across the barred spiral galaxy M83, using the 46 pc resolution data from the Atacama Large Millimeter/submillimeter Array. The R _21/10 map clearly evidences the systematic large-scale
Jin Koda, Fumi Egusa, Akihiko Hirota, Amanda M Lee, Tsuyoshi Sawada, Fumiya Maeda   +5 more
doaj   +1 more source

Molecular Gas Kinematics in Barred Spiral Galaxies [PDF]

, 1999
To quantify the effect that bar driven mass inflow can have on the evolution of a galaxy requires an understanding of the dynamics of the inflowing gas.
Athanassoula E., Athanassoula E., Burbidge E. M., Combes F., Duval M. F., Friedli D., Handa T., Kartik Sheth, Lindblad P. A. B., Merrifield M. R., Michael W. Regan, Palous J., Planesas P., Reuter H.-P., Reuter H.-P., Reynaud D., Reynaud D., Sancisi R., Schwarz M. P., Stuart N. Vogel, Teuben P. J., Young J. S.   +21 more
core   +3 more sources

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

Perturbed precessing ellipses as the building blocks of spiral arms in a barred galaxy with two pattern speeds [PDF]

, 2022
M. Harsoula, C. Efthymiopoulos, G. Contopoulos, A. C. Tzemos   +3 more
openalex   +2 more sources

The Abundance and Properties of Barred Galaxies out to z ∼ 4 Using JWST CEERS Data

The Astrophysical Journal
We 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, Shardha Jogee, Eden Wise, Keith Pritchett Jr., Elizabeth J. McGrath, Steven L. Finkelstein, Kartheik G. Iyer, Pablo Arrabal Haro, Micaela B. Bagley, Mark Dickinson, Jeyhan S. Kartaltepe, Anton M. Koekemoer, Casey Papovich, Nor Pirzkal, L. Y. Aaron Yung, Bren E. Backhaus, Eric F. Bell, Rachana Bhatawdekar, Yingjie Cheng, Luca Costantin, Alexander de la Vega, Mauro Giavalisco, Nimish P. Hathi, Benne W. Holwerda, Peter Kurczynski, Ray A. Lucas, Bahram Mobasher, Pablo G. Pérez-González, Fabio Pacucci   +28 more
doaj   +1 more source

Betaine‐Conjugated ß‐Peptide Foldamers: Influence of Quaternary Charge on Self‐Organization and MorphologyFormation

ChemistryOpen, Volume 14, Issue 12, December 2025.
N‐terminal betaine conjugation modifies β‐peptide helices, influencing folding and self‐organization. For [1S, 2S]‐ACPC, folding to an H12 helix was unaffected, while [1R, 2R]‐ACHC formed an H14 helix instead of H10. Alternating heterochiral oligomers made of enantiomeric pairs of trans‐ACPC showed enhanced solubility and E‐strand formation.
Nikolett Varró, Eszter Erdei, Dóra Bogdán, Eszter Kalydi, Ruth Deme, Balázs Balogh, Imola Cs. Szigyártó, Tamás Beke‐Somfai, Zoltán Varga, Pál Szabó, István M. Mándity   +10 more
wiley   +1 more source

Unveiling a Hidden Bar-like Structure in NGC 1087: Kinematic and Photometric Evidence Using MUSE/VLT, ALMA, and JWST

The Astrophysical Journal
We report a faint nonaxisymmetric structure in NGC 1087 through the use of James Webb Space Telescope Near Infrared Camera, with an associated kinematic counterpart observed as an oval distortion in the stellar velocity map, H α , and CO J = 2 → 1 ...
Carlos López-Cobá, Lihwai Lin, Sebastián F. Sánchez   +2 more
doaj   +1 more source

Statistical Study of the Star Formation Efficiency in Bars: Is Star Formation Suppressed in Gas-rich Bars?

The Astrophysical Journal, 2023
The dependence of the star formation efficiency (SFE) on galactic structures—especially whether the SFE in the bar region is lower than those in other regions—has recently been debated. We report the SFEs of 18 nearby gas-rich massive star-forming barred
Fumiya Maeda, Fumi Egusa, Kouji Ohta, Yusuke Fujimoto, Asao Habe   +4 more
doaj   +1 more source

The Illustris Simulation: Supermassive Black Hole - Galaxy Connection Beyond the Bulge

, 2017
We study the spiral arm morphology of a sample of the local spiral galaxies in the Illustris simulation and explore the supermassive black hole - galaxy connection beyond the bulge (e.g., spiral arm pitch angle, total stellar mass, dark matter mass, and ...
Berrier, Joel C., Hewitt, Ian B., Koval, Lauren E., Mutlu-Pakdil, Burçin, Seigar, Marc S., Treuthardt, Patrick   +5 more
core   +1 more source

Groundwater Microbial Diversity Associated With Icelandic Basaltic Subsurface Environments

Environmental Microbiology Reports, Volume 17, Issue 6, December 2025.
Overview of microbial diversity and environmental drivers in Icelandic deep basaltic aquifers. Using 16S rRNA gene metabarcoding across 22 geothermal wells spanning broad temperature, pH, and bedrock‐age gradients, the study reveals distinct bacterial and archaeal community structures shaped by temperature, pH, and host‐rock reactivity.
Juliette Bas‐Lorillot, Bénédicte Ménez, Bastien Wild, Guillaume Borrel, Manon Le Bihan, Andri Stefánsson, Jóhann Gunnarsson‐Robin, Anna Bríet Bjarkadóttir, Sigríður María Aðalsteinsdóttir, Delphine Tisserand, Damien Daval, Emmanuelle Gérard   +11 more
wiley   +1 more source