ISM metallicity variations across spiral arms in disk galaxies
, 2022 Chemical abundance variations in the interstellar medium provide important information about the galactic evolution, star-formation, and enrichment histories.
I. Minchev +20 more
core +1 more source
The stellar dynamics of spiral arms in barred spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2006 Abstract A dynamical mechanism is proposed that explains the spiral structure observed frequently as a continuation of the bars in barred spiral galaxies. It is argued that the part of the spirals attached to the bar is due to chaotic orbits. These are chaotic orbits that exhibit for long time intervals a 4:1-resonance orbital behaviour.
openaire +1 more source
The nature of arms in spiral galaxies [PDF]
Astronomy and Astrophysics Supplement Series, 1999 A Fourier analysis of the intensity distribution in the planes of nine spiral galaxies is performed. In terms of the arm classification scheme of Elmegreen & Elmegreen (1987) seven of the galaxies have well-defined arms (classes 12 and 9) and two have intermediate-type arms (class 5).
null M.S. del Río, J. Cepa
openaire +1 more source
Spiral Arms, Infall, and Misalignment of the Circumbinary Disk from the Circumstellar Disks in the Protostellar Binary System L1551 NE [PDF]
, 2017 We report the ALMA Cycle 2 observations of the Class I binary protostellar system L1551 NE in the 0.9 mm continuum, C18O (3–2), 13CO (3–2), SO (78–67), and CS (7–6) emission.
S. Takakuwa +7 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
Advanced Healthcare Materials, EarlyView.Microgel‐based 3D printed constructs represent a compelling and versatile innovation for engineering architecturally complex, dynamically remodelable, and biocompatible structures with high structural fidelity and bioactivity. By integrating material design, biofabrication, and biological function, these systems enable the development of adaptive ...
Elena Ghighină +2 more
wiley +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
Rapid Fabrication of Self‐Propelled and Steerable Magnetic Microcatheters for Precision Medicine
Advanced Materials, EarlyView.A rapid Joule heating fabrication method for the production of self‐propelling, adaptive microcatheters, with tunable stiffness and integrated microfluidic channels is presented. Demonstrated through three microrobotic designs, including a steerable guiding catheter, an untethered wave‐crawling TubeBot, and a distal‐end propelled microcatheter, it was ...
Zhi Chen +5 more
wiley +1 more source
JWST Reveals a Surprisingly High Fraction of Galaxies Being Spiral-like at 0.5 ≤ z ≤ 4
The Astrophysical Journal LettersSpiral arms are one of the most important features used to classify the morphology of local galaxies. The cosmic epoch when spiral arms first appeared contains essential clues to the evolution of disk galaxies.
Vicki Kuhn +5 more
doaj +1 more source
Combined dynamical effects of the bar and spiral arms in a Galaxy model. Application to the solar neighbourhood [PDF]
Astronomy & Astrophysics, 2018 Context. Observational data indicate that the Milky Way is a barred spiral galaxy. Computation facilities and availability of data from Galactic surveys stimulate the appearance of models of the Galactic structure, however further efforts are needed to ...
T. Michtchenko +3 more
semanticscholar +1 more source