Results 51 to 60 of about 559,591 (386)
The Statistical Properties of Spiral Arms in Nearby Disk Galaxies
Astrophysical Journal, 2020 We analyze 4378 nearby bright disk (S0 and spiral) galaxies selected from the Sloan Digital Sky Survey to characterize their spiral structure and systematically investigate the relationships between spiral arm properties (strength, pitch angle, and ...
Sijie Yu, L. Ho
semanticscholar +1 more source
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
doaj +1 more source
The Observability of Vortex-driven Spiral Arms in Protoplanetary Disks: Basic Spiral Properties [PDF]
Astrophysical Journal, 2019 Some circumstellar disks are observed to show prominent spiral arms in infrared scattered light or (sub-)millimeter dust continuum. The spirals might be formed from self-gravity, shadows, or planet-disk interactions.
P. Huang +4 more
semanticscholar +1 more source
Stellar Motion around Spiral Arms: Gaia Mock Data [PDF]
, 2014 We compare the stellar motion around a spiral arm created in two different scenarios, transient/co-rotating spiral arms and density-wave-like spiral arms.
Cropper, M. +5 more
core +2 more sources
Clues to the formation of spiral structure in M51 from the ages and locations of star clusters [PDF]
, 2017 We determine the spatial distributions of star clusters at different ages in the grand-design spiral galaxy M51 using a new catalog based on multi-band images taken with the Hubble Space Telescope (HST). These distributions, when compared with the spiral
Calzetti, Daniela +10 more
core +1 more source
Nature, 1971 The Spiral Structure of Our Galaxy . Edited by W. Becker and G. Contopoulos. (International Astronomical Union Symposium No. 36, held in Basel, Switzerland, August 29–September 4, 1969.) Pp. xiii + 478. (Reidel: Dordrecht, 1970.) Hfl. 80.
openaire +1 more source
Multiple Spiral Arms in the Disk around Intermediate-mass Binary HD 34700A [PDF]
Astrophysical Journal, 2019 We present the first images of the transition disk around the close binary system HD 34700A in polarized scattered light using the Gemini Planet Imager instrument on Gemini South.
J. Monnier +16 more
semanticscholar +1 more source
Spiral Density Waves in a Young Protoplanetary Disk [PDF]
, 2016 Gravitational forces are expected to excite spiral density waves in protoplanetary disks, disks of gas and dust orbiting young stars. However, previous observations that showed spiral structure were not able to probe disk midplanes, where most of the ...
Andrews, Sean M. +22 more
core +3 more sources
Highly Embedded 8 μm cores of Star Formation in the Spiral Arms and Filaments of 15 Nearby Disk Galaxies [PDF]
Astrophysical Journal Supplement Series, 2019 Spitzer Space Telescope observations of 15 spiral galaxies show numerous dense cores at 8 μm that are revealed primarily in unsharp mask images. The cores are generally invisible in optical bands because of extinction, and they are also indistinct at 8 ...
B. Elmegreen, D. Elmegreen
semanticscholar +1 more source
The evolution of pitch angles of spiral arms [PDF]
Monthly notices of the Royal Astronomical Society, 2019 In spiral galaxies, the pitch angle, α, of the spiral arms is often proposed as a discriminator between theories for the formation of the spiral structure.
J. Pringle, C. Dobbs
semanticscholar +1 more source