Results 31 to 40 of about 593,852 (287)
, 2022 The most important theory of the spiral arms of galaxies is the density wave theory based on the Lin-Shu dispersion relation. However, the density waves move with the group velocity towards the inner Lindblad resonance and tend to disappear. Various mechanisms to replenish the spiral waves have been proposed.
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Measuring Spiral Arm Torques: Results for M100 [PDF]
The Astronomical Journal, 1995 Uuencoded compressed PostScript (300k) - 26 pages, figs. 3-9; submitted to AJ. Full PostScript version (with all figures) is available through anonymous ftp at ftp://astro.princeton.edu/ognedin/Torque/paper.ps or ftp://astro.princeton.edu/library/preprints/pop613.ps.Z or through WWW http://www.astro.princeton.edu/~library/prep ...
GNEDIN, OY, GOODMAN, J, FREI, Z
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The discovery of the spiral arms of the Milky Way [PDF]
Symposium - International Astronomical Union, 1985 Attempts in the 1930s and 1940s to determine the spiral structure of the Milky Way by star counting methods, essentially the continuation of the work of the Kapteyn Astronomical Laboratory, failed to reach this goal. A new foundation for the search was laid by Walter Baade in his studies of stellar populations. With the recognition that highly luminous
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SELF-PERPETUATING SPIRAL ARMS IN DISK GALAXIES [PDF]
The Astrophysical Journal, 2013 16 pages, 11 figures, APJ accepted. Interpretation and conclusions unchanged.
D’Onghia, Elena +2 more
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Massive Stars in the Nuclei and Arms of Spirals [PDF]
Proceedings of the International Astronomical Union, 2007 AbstractMany of the properties of massive stars in external galaxies, such as chemical compositions, mass functions, and ionizing fluxes, can be derived from the study of the associated clouds of ionized gas. Moreover, the signatures of Wolf-Rayet stars are often detected in the spectra of extragalactic H ii regions.
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CHARACTERIZING SPIRAL ARM AND INTERARM STAR FORMATION [PDF]
The Astrophysical Journal, 2016 ABSTRACT Interarm star formation contributes significantly to a galaxy’s star formation budget and provides an opportunity to study stellar birthplaces unperturbed by spiral arm dynamics. Using optical integral field spectroscopy of the nearby galaxy NGC 628 with VLT/MUSE, we construct H α
Kreckel, K. +6 more
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Synergistic perspectives—How single‐molecule biophysics complement biochemical understanding
FEBS Letters, EarlyView.In this review, we discuss how ensemble biochemistry and single‐molecule approaches are complementary, outline commonly used single‐molecule techniques, and illustrate their relevance through two representative case studies: chromatin organization by SMC complexes and pathway choice during DNA double‐strand break repair.
Sara De Bragança +2 more
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Theoretical Model of Spiral Rain Clusters and Analysis of Their Horizontal Structure Equation
Atmosphere, 2017 Rain clusters are mesoscale disaster weather systems, and some of rain clusters have spiral structures. In this paper, a theoretical model of spiral rain cluster is established under pseudo-adiabatic approximation, and its horizontal structure equation ...
Jie Yu, Jiquan Zhang, Ming Zhang
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A New Spiral Arm of the Galaxy: The Far 3 kpc Arm [PDF]
The Astrophysical Journal, 2008 We report the detection in CO of the far-side counterpart of the well-known expanding 3-Kpc Arm in the central region of the Galaxy. In a CO longitude-velocity map at b = 0 deg the Far 3-Kpc Arm can be followed over at least 20 deg of Galactic longitude as a faint lane at positive velocities running parallel to the Near Arm.
Dame, T. M., Thaddeus, P.
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FEBS Letters, EarlyView.Heterodimeric amino acid transporters consist of SLC7 and SLC3 family proteins arranged in a conserved structural organization. They regulate nutrient transport across cell membranes, supporting essential cellular functions. These transporters also contribute to xenobiotic/drug uptake and distribution.
Mariafrancesca Scalise +5 more
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