Results 111 to 120 of about 12,684 (325)
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
Advanced Functional Materials, EarlyView.An original method is presented for producing artificial spider silk fibers with magnetic and magnetomechanical responsiveness, which consists in coating them with a nanometer‐thick layer of FeCo alloy by sputtering deposition. The challenge of combining organic materials and inorganic magnetic nanostructures is addressed, thus taking a step forward ...
Filippo Lanaro +5 more
wiley +1 more source
Analytical forms of chaotic spiral arms
, 2016 We develop an analytical theory of chaotic spiral arms in galaxies. This is based on the Moser theory of invariant manifolds around unstable periodic orbits.
Contopoulos G. +2 more
core +1 more source
Dark matter spiral arms in Milky Way-like halos [PDF]
Context. The coupling between the dark matter (DM) halo and the stellar disc is a key factor in galactic evolution. While the interaction between structures like the Galactic bar and DM halos has been explored (e.g.
Bernet, M +11 more
core +3 more sources
Deep NIR Surveys in the Galactic Plane: A General Overview and the Study of Scutum’s Spiral Arm
Frontiers in Astronomy and Space Sciences, 2021 Despite the impressive advances in Galactic structure studies, thanks to the large astronomical surveys, there remain several open questions. Although at low distances, optical surveys can bring us important information, the potential of NIR surveys ...
E. B. Amôres, R. S. Levenhagen
doaj +1 more source
Detection of the Milky Way spiral arms in dust from 3D mapping [PDF]
Astronomy & Astrophysics, 2018 Large stellar surveys are sensitive to interstellar dust through the effects of reddening. Using extinctions measured from photometry and spectroscopy, together with three-dimensional (3D) positions of individual stars, it is possible to construct a ...
S. Rezaei Kh. +3 more
semanticscholar +1 more source
Chiral Phase Change Nanomaterials
Advanced Functional Materials, EarlyView.This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow +11 more
wiley +1 more source
Deep Learning Segmentation of Spiral Arms and Bars [PDF]
, 2023 We present the first deep learning model for segmenting galactic spiral arms and bars. In a blinded assessment by expert astronomers, our predicted spiral arm masks are preferred over both current automated methods (99% of evaluations) and our original ...
Spindler, Ashley, Walmsley, Mike
core +1 more source
Multiple Spiral Arms in Protoplanetary Disks: Linear Theory [PDF]
Astrophysical Journal, 2018 Recent observations of protoplanetary disks, as well as simulations of planet–disk interaction, have suggested that a single planet may excite multiple spiral arms in the disk, in contrast to the previous expectations based on linear theory (predicting a
Ryan Miranda, R. Rafikov
semanticscholar +1 more source
Multidimensional Cellular Micro‐Compartments to Model Invasive Lobular Carcinoma Dormancy
Advanced Healthcare Materials, EarlyView.Invasive lobular carcinoma (ILC) is an understudied subtype of breast cancer that is susceptible to late recurrences. In this study, micro‐compartmentalization techniques spanning multiple dimensions, including 2D, pseudo‐3D, and 3D, are integrated to uncover the mechanisms underlying ILC dormancy, revealing the central role of p27Kip1.
Xilal Y. Rima +15 more
wiley +1 more source