Results 111 to 120 of about 559,591 (386)
What Does the Milky Way Look Like?
The Astrophysical Journal, 2023 In spite of much work, the overall spiral structure morphology of the Milky Way remains somewhat uncertain. In the last two decades, accurate distance measurements have provided us with an opportunity to solve this issue.
Y. Xu +7 more
doaj +1 more source
Detection of a Corrugated Velocity Pattern in the Spiral Galaxy NGC 5427 [PDF]
, 2000 Here we report the detection, in Halpha emission, of a radial corrugation in the velocity field of the spiral galaxy NGC 5427. The central velocity of the Halpha line displays coherent, wavy-like variations in the vicinity of the spiral arms. The spectra
Berdnikov L. N. +18 more
core +2 more sources
Star Formation in Spiral Arms [PDF]
EAS Publications Series, 2011 13 pages, 3 figures, Ecole Evry Schatzman 2010: Star Formation in the Local Universe.
openaire +2 more sources
Structure of a Protobinary System: An Asymmetric Circumbinary Disk and Spiral Arms [PDF]
Astrophysical Journal, 2018 We investigate the gas structures around young binary stars using three-dimensional numerical simulations. Each model exhibits circumstellar disks, spiral arms, and a circumbinary disk with an inner gap or cavity.
Tomoaki Matsumoto, K. Saigo, S. Takakuwa
semanticscholar +1 more source
Double Helical Plasmonic Antennas
Advanced Functional Materials, EarlyView.Plasmonic double helical antennas funnel circularly polarized light to the nanoscale, offering strong chiroptical interaction and directional light emission. Extending a single helix design tool, this study combines numerical modeling with experimental validation, revealing large, broadband dissymmetry factors in the visible range.
Aleksei Tsarapkin +7 more
wiley +1 more source
, 2019 A method which we have developed for determining corotation radii, has allowed us to map in detail the radial resonant structures of barred spiral galaxies. Here we have combined this information with new determinations of the bar strength and the pitch angle of the innermost segment of the spiral arms to find relationships between these parameters of ...
Font, Joan +3 more
openaire +2 more sources
Magnetic Fields in Spiral Arms.
The Astrophysical Journal, 1953 In this paper two independent methods are described for estimating the magnetic field in the spiral arm in which we are located. The first method is based on an interpretation of the dispersion (of the order of 10° ) in the observed planes of polarization of the light of the distant stars; it leads to an estimate of H = 7.2 X 10 -6 gauss.
S. Chandrasekhar, E. Fermi
openaire +1 more source
The PdBI Arcsecond Whirlpool Survey (PAWS): The Role of Spiral Arms in Cloud and Star Formation [PDF]
, 2017 The process that leads to the formation of the bright star-forming sites observed along prominent spiral arms remains elusive. We present results of a multi-wavelength study of a spiral arm segment in the nearby grand-design spiral galaxy M51 that ...
E. Schinnerer +11 more
semanticscholar +1 more source
Are Elias 2-27's Spiral Arms Driven by Self-gravity, or by a Companion? A Comparative Spiral Morphology Study [PDF]
Astrophysical Journal, 2018 The spiral waves detected in the protostellar disk surrounding Elias 2-27 have been suggested as evidence of the disk being gravitationally unstable.
D. Forgan, J. Ilee, F. Meru
semanticscholar +1 more source