Bibcode
Asensio Ramos, A.; de la Cruz Rodríguez, J.; Pastor Yabar, A.
Bibliographical reference
Astronomy and Astrophysics, Volume 620, id.A73, 16 pp.
Advertised on:
12
2018
Journal
Citations
26
Refereed citations
23
Description
The quality of images of the Sun obtained from the ground are severely
limited by the perturbing effect of the Earth's turbulent atmosphere.
The post-facto correction of the images to compensate for the presence
of the atmosphere require the combination of high-order adaptive optics
techniques, fast measurements to freeze the turbulent atmosphere, and
very time-consuming blind deconvolution algorithms. Under mild seeing
conditions, blind deconvolution algorithms can produce images of
astonishing quality. They can be very competitive with those obtained
from space, with the huge advantage of the flexibility of the
instrumentation thanks to the direct access to the telescope. In this
contribution we make use of deep learning techniques to significantly
accelerate the blind deconvolution process and produce corrected images
at a peak rate of ˜100 images per second. We present two different
architectures that produce excellent image corrections with noise
suppression while maintaining the photometric properties of the images.
As a consequence, polarimetric signals can be obtained with standard
polarimetric modulation without any significant artifact. With the
expected improvements in computer hardware and algorithms, we anticipate
that on-site real-time correction of solar images will be possible in
the near future.
Related projects
Solar and Stellar Magnetism
Magnetic fields are at the base of star formation and stellar structure and evolution. When stars are born, magnetic fields brake the rotation during the collapse of the mollecular cloud. In the end of the life of a star, magnetic fields can play a key role in the form of the strong winds that lead to the last stages of stellar evolution. During
Tobías
Felipe García
Magnetism, Polarization and Radiative Transfer in Astrophysics
Magnetic fields pervade all astrophysical plasmas and govern most of the variability in the Universe at intermediate time scales. They are present in stars across the whole Hertzsprung-Russell diagram, in galaxies, and even perhaps in the intergalactic medium. Polarized light provides the most reliable source of information at our disposal for the
Tanausú del
Pino Alemán