Results 81 to 90 of about 8,434 (230)
Multicolor Photometry of Barred Spiral Galaxies [PDF]
International Astronomical Union Colloquium, 1996 B – V and R – I color maps (from CCD imagery obtained at Cerro Tololo Inter-American Observatory) of six barred spiral galaxies have been used (Horst 1992) to investigate stellar populations within the bars and nuclei. Two-color diagrams show that the distribution of pixel colors largely parallels the expected locus for normal unreddened stars. If the “
William D. Horst, Charles J. Peterson
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The CO-to-H2 Conversion Factor in the Barred Spiral Galaxy M83
The Astrophysical JournalWe analyze the CO-to-H _2 conversion factor ( α _CO ) in the nearby barred spiral galaxy M83. We present new H i observations from the VLA and single-dish GBT in the disk of the galaxy, and combine them with maps of CO(1-0) integrated intensity and dust ...
Amanda M Lee +4 more
doaj +1 more source
Stellar Bars in Isolated Gas-rich Spiral Galaxies Do Not Slow Down
The Astrophysical Journal, 2023 Elongated bar-like features are ubiquitous in galaxies, occurring at the centers of approximately two-thirds of spiral disks in the nearby Universe. Due to gravitational interactions between the bar and the other components of galaxies, it is expected ...
Angus Beane +8 more
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ChemPhysChem, Volume 26, Issue 18, September 19, 2025.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
Rings and spirals in barred galaxies â II. Ring and spiral morphology [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 15 pages, 11 figures, accepted for publication in ...
E. Athanassoula +4 more
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Impacts of Bar-driven Shear and Shocks on Star Formation
The Astrophysical JournalBars drive gas inflow. As the gas flows inward, shocks and shear occur along the bar dust lanes. Such shocks and shear can affect the star formation (SF) and change the gas properties.
Taehyun Kim +14 more
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Evidence of a Cloud–Cloud Collision from Overshooting Gas in the Galactic Center
The Astrophysical Journal, 2023 The Milky Way is a barred spiral galaxy with bar lanes that bring gas toward the Galactic center. Gas flowing along these bar lanes often overshoots, and instead of accreting onto the Central Molecular Zone (CMZ), it collides with the bar lane on the ...
Savannah R. Gramze +6 more
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Stellar Populations, Bars and Secular Evolution in Late-Type Galaxies [PDF]
, 2000 We have done a robust statistical analysis of UBV color profiles of 257 Sbc barred and unbarred galaxies. We found that there is an excess of barred galaxies among the objects with null or positive (bluish inward) color gradients, which seems to indicate
Corsini, Enrico Maria +3 more
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Advanced Science, Volume 12, Issue 34, September 11, 2025.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
Unstable Bar and Spiral Modes of Disk Galaxies [PDF]
The Astrophysical Journal, 2005 Submitted to the Astrophysical ...
Mir Abbas Jalali, C. Hunter
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