, 2000 Two dimensional Fourier spectra of near-infrared images of galaxies provide a powerful diagnostic tool for the detection of spiral arm modulation in stellar disks. Spiral arm modulation may be understood in terms of interference patterns of outgoing and incoming density wave packets or modes.
I. Puerari +4 more
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Spiral arm amplitude variations and pattern speeds in the grand design galaxies M51, M81, and M100
The Astrophysical Journal, 1989 In the modal theory of galactic spiral structure, the amplitude of a prominent two-arm spiral pattern should oscillate slightly with galactocentric distance because of an interference between the outward and inward propagating waves. In the stellar dynamical theory, the spiral arm amplitudes should oscillate because of differential crowding near and ...
Bruce G. Elmegreen +2 more
openalex +3 more sources
Uncovering Spiral Structure in Flocculent Galaxies [PDF]
, 1996 We present K'(2.1 micron) observations of four nearby flocculent spirals, which clearly show low-level spiral structure and suggest that kiloparsec-scale spiral structure is more prevalent in flocculent spirals than previously supposed. In particular, the prototypical flocculent spiral NGC 5055 is shown to have regular, two-arm spiral structure to a ...
Adamson A. J. +6 more
arxiv +4 more sources
PANORAMIC: Discovery of an Ultra-Massive Grand-Design Spiral Galaxy at $z\sim5.2$ [PDF]
We report the discovery of an ultra-massive grand-design red spiral galaxy, named Zhúlóng (Torch Dragon), at $z_{\rm phot} = 5.2^{+0.3}_{-0.2}$ in the JWST PANORAMIC survey, identified as the most distant bulge+disk galaxy with spiral arms known to date.
Mengyuan Xiao +28 more
openalex +3 more sources
Metallicity Gradient of a Lensed Face-on Spiral Galaxy at Redshift 1.49 [PDF]
, 2011 We present the first metallicity gradient measurement for a grand-design face-on spiral galaxy at z~1.5. This galaxy has been magnified by a factor of 22$\times$ by a massive, X-ray luminous galaxy cluster MACS\,J1149.5+2223 at z=0.544.
Asplund +21 more
core +4 more sources
A grand-design spiral galaxy with an ordered magnetic field at redshift 2.6 as resolved with ALMA and gravitational lensing [PDF]
Submitted to MNRAS ...
W. de Roo +5 more
openalex +3 more sources
Flocculent and grand design spiral arm structure in cluster galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 1982 D. M. Elmegreen +2 more
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Role of gas in supporting grand spiral structure [PDF]
, 2015 The density wave theory for the grand-design two-armed spiral pattern in galaxies is successful in explaining several observed features. However, the long-term persistence of this spiral structure is a serious problem since the group transport would ...
Ghosh, Soumavo, Jog, Chanda J.
core +2 more sources
Flocculent and grand design spiral structure in field, binary and group galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 1982 D. M. Elmegreen, Bruce G. Elmegreen
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Giant Molecular Clouds and Star Formation in the Non-Grand Design Spiral Galaxy NGC 6946 [PDF]
, 2012 We present high spatial resolution observations of giant molecular clouds (GMCs) in the eastern part of the nearby spiral galaxy NGC 6946 obtained with the Combined Array for Research in Millimeter-wave Astronomy (CARMA). We have observed CO(1 → 0), CO(2
David Rebolledo +2 more
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