Results 21 to 30 of about 8,038 (262)
Invariant manifolds in barred galaxy simulations
Astronomy & AstrophysicsContext. Understanding the nature of spiral arms in disc galaxies remains an open problem. Invariant manifolds associated with bars provide a framework in which particles with specific kinematic properties (manifold-compatible) are naturally able to ...
Soler-Terricabras T. +2 more
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Spiral arms across stellar populations in simulations via the local dimension method
Astronomy & AstrophysicsContext. The origin and nature of spiral arms remain unclear. Star-forming regions and young stars are generally strongly associated with the spiral structure, but there are few quantitative predictions from simulations about the contribution of stars of
Ardèvol J. +5 more
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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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IEEE Access, 2022 The analysis of Archimedean spiral slots using the theory of characteristic modes is presented in this article. Purely magnetic characteristic modes are used to study the behavior of a spiral slot etched in an infinite ground plane.
Pallavi Sharma, Jennifer T. Bernhard
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, 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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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 Hα maps including detailed corrections for dust ...
Kreckel, K. +6 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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ON THE NATURE OF THE LOCAL SPIRAL ARM OF THE MILKY WAY [PDF]
The Astrophysical Journal, 2013 Trigonometric parallax measurements of nine water masers associated with the Local arm of the Milky Way were carried out as part of the BeSSeL Survey using the VLBA. When combined with 21 other parallax measurements from the literature, the data allow us to study the distribution and 3-dimensional motions of star forming regions in the spiral arm over ...
Xu, Y. +8 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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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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