Results 11 to 20 of about 10,165,445 (355)
Active phase separation by turning towards regions of higher density [PDF]
Nature Physics, 2020 Studies of active matter, from molecular assemblies to animal groups, have revealed two broad classes of behaviour: a tendency to align yields orientational order and collective motion, whereas particle repulsion leads to self-trapping and motility ...
Jie Zhang +4 more
semanticscholar +2 more sources
Solar Physics, 1970 We describe the great activity associated with Mount Wilson 16997, a single αp spot without plage that produced a number of large flares and developed into a substantial center. The activity was signalled by the emergence of f polarity and weak plage ahead of the spot on 24 September 1968 (although the region was already seen at the limb at the 22 ...
H. Zirin
+8 more sources
Spectroscopic Observations of Fe XVIII in Solar Active Regions [PDF]
, 2012 The large uncertainties associated with measuring the amount of high temperature emission in solar active regions represents a significant impediment to making progress on the coronal heating problem. Most current observations at temperatures of 3 MK and
Cargill +18 more
core +2 more sources
The Magnetic Energy - Helicity Diagram of Solar Active Regions [PDF]
, 2012 Using a recently proposed nonlinear force-free method designed for single vector magnetograms of solar active regions we calculate the instantaneous free magnetic energy and relative magnetic helicity budgets in 162 vector magnetograms corresponding to ...
Georgoulis, Manolis K. +2 more
core +2 more sources
Helioseismology of Pre-Emerging Active Regions II: Average Emergence Properties [PDF]
, 2012 We report on average subsurface properties of pre-emerging active regions as compared to areas where no active region emergence was detected. Helioseismic holography is applied to samples of the two populations (pre-emergence and without emergence), each
Barnes, G. +4 more
core +2 more sources
Modelling nanoflares in active regions and implications for coronal heating mechanisms. [PDF]
Philos Trans A Math Phys Eng Sci, 2015 Cargill PJ, Warren HP, Bradshaw SJ.
europepmc +2 more sources
STARRPeaker: uniform processing and accurate identification of STARR-seq active regions. [PDF]
Genome Biol, 2020 Lee D +10 more
europepmc +3 more sources
How Good Is the Bipolar Approximation of Active Regions for Surface Flux Transport? [PDF]
Solar Physics, 2020 We investigate how representing active regions with bipolar magnetic regions (BMRs) affects the end-of-cycle polar field predicted by the surface flux transport model.
A. Yeates
semanticscholar +1 more source
Distinguishing between flaring and nonflaring active regions [PDF]
Astronomy & Astrophysics, 2020 Context. Large-scale solar eruptions significantly affect space weather and damage space-based human infrastructures. It is necessary to predict large-scale solar eruptions; it will enable us to protect the vulnerable infrastructures of our modern ...
S. Hazra, Gopal Sardar, Partha Chowdhury
semanticscholar +1 more source
Appearance of active regions at the end of solar cycle 24 and at the beginning of cycle 25
Solar-Terrestrial Physics, 2022 The spatial-temporal picture of appearance of active regions and the relationship of their appearance with the structure and development of a large-scale magnetic field were studied during the transition from solar cycle 24 to 25.
Grigoryev V. M. +2 more
doaj +1 more source