Relevant bibliographies by topics / Corona polarization

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Corona polarization'

Author: Grafiati
Published: 6 September 2023
Last updated: 31 July 2025

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Journal articles on the topic "Corona polarization"

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Ursini, F., G. Matt, S. Bianchi, A. Marinucci, M. Dovčiak, and W. Zhang. "Prospects for differentiating extended coronal geometries in AGNs with the IXPE mission." Monthly Notices of the Royal Astronomical Society 510, no. 3 (2021): 3674–87. http://dx.doi.org/10.1093/mnras/stab3745.

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ABSTRACT X-ray polarimetry can potentially constrain the unknown geometrical shape of active galactic nucleous (AGN) coronae. We present simulations of the X-ray polarization signal expected from AGN coronae, assuming three different geometries, namely slab, spherical, and conical. We use the fully relativistic Monte Carlo Comptonization code monk to compute the X-ray polarization degree and angle. We explore different coronal parameters such as shape, size, location, and optical depth. Different coronal geometries give a significantly different X-ray polarization signal. A slab corona yields
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Hebbur Dayananda, Supriya, Ángel de Vicente, Tanausú del Pino Alemán, Javier Trujillo Bueno, and Nataliia G. Shchukina. "P-CORONA: A New Tool for Calculating the Intensity and Polarization of Coronal Lines in 3D Models of the Solar Corona." Astrophysical Journal 987, no. 1 (2025): 39. https://doi.org/10.3847/1538-4357/add32e.

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Abstract The critical need to study the magnetic field in the solar corona is highlighted by recent observational facilities, such as the Daniel K. Inouye Solar Telescope and Aditya-L1. A powerful tool for probing the magnetism of the solar corona is forward modeling of the intensity and polarization of coronal emission lines in three-dimensional (3D) magnetohydrodynamic models. Here we present P-CORONA, a new spectral synthesis code designed to calculate the intensity and polarization of coronal lines in 3D models of the solar corona, taking into account the symmetry breaking induced by magne
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Liang, Y., Z. Q. Qu, Y. J. Chen, Y. Zhong, Z. M. Song, and S. Y. Li. "Registration and imaging polarimetry of the Fe 6374 Å red coronal line during the 2017 total solar eclipse." Monthly Notices of the Royal Astronomical Society 503, no. 4 (2021): 5715–29. http://dx.doi.org/10.1093/mnras/stab463.

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ABSTRACT Strict registration is critical for imaging polarimetry; a highly accurate registration approach to the coronal image and imaging polarimetry of the Fe 6374 Å red coronal line have been researched in this paper. In order to improve the registration accuracy, this paper proposes the idea of image enhancement based on blind deconvolution combined with noise-adaptive fuzzy equalization algorithms. After image enhancement, the cross-correlation registration algorithm achieves better results. To diagnose a low-temperature corona, the polarization brightness of the red coronal line data and
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Merzlyakov, V., Ts Tsvetkov, L. Starkova, and R. Miteva. "Polarization of white-light solar corona and sky polarization effect during total solar eclipse on March 29, 2006." Serbian Astronomical Journal, no. 199 (2019): 83–87. http://dx.doi.org/10.2298/saj190620005m.

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Ground-based total solar eclipse observations are still the key method for coronal investigations. The question about its white-light degree of polarization remains unanswered. There are hypotheses claiming that the degree of polarization in certain regions of the corona may be higher than the maximal theoretically predicted value determined by Thomson scattering. We present polarization of the white-light solar corona observations obtained by three different teams during the March 29, 2006 solar total eclipse. We give an interpretation on how the polarization of the sky impacts brightness of
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Isobe, Syuzo, Tomohiro Hirayama, Naoshi Baba, and Noriaki Miura. "Optical Coronal Polarization and Solar Dust Ring." Publications of the Astronomical Society of Japan 39, no. 4 (1987): 667–77. https://doi.org/10.1093/pasj/39.4.667.

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Abstract Observations of the outer solar corona on the Java island were carried out on June 11, 1983, at a 30-km altitude using a B-15 balloon. At 5325, 5965, 7200, and 8015Å, data on polarizations in a field of 5° × 5° centered nearly on the sun were obtained. Our contour maps of polarization are the first of the two-dimensional polarization distribution covering wide area. An excess of polarization at the four wavelengths was found in the ecliptic plane and at the location of a coronal streamer. High polarization at the coronal streamer is caused mainly by coronal electrons, but dust grains
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Lebedev, A. N., I. A. Belenko, O. I. Bougaenko, et al. "Eclipse Polarimetric Research of Prominences." International Astronomical Union Colloquium 167 (1998): 66–69. http://dx.doi.org/10.1017/s0252921100047308.

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AbstractA polarization analysis of E–limb prominences on November 3, 1994 is presented. Photometry and data reduction of 24 prominence pictures based on IDL software and Stokes–vector presentation and applied to Hα emission resulted in an accuracy of 1–1.5% in determination of the polarization degree and of 1.5–2.0° in the polarization direction. Distributions of polarization degree (polarization images) for prominences and the “white light” corona are presented. A polarization degree of 2–5% for prominences and 10–25% for the nearby white light corona are found. The polarization direction is
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Patel, Ritesh, Daniel B. Seaton, Amir Caspi, et al. "A Chromatic Treatment of Linear Polarization in the Solar Corona at the 2023 Total Solar Eclipse." Research Notes of the AAS 7, no. 11 (2023): 241. http://dx.doi.org/10.3847/2515-5172/ad0b0d.

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Abstract The broadband solar K-corona is linearly polarized due to Thomson scattering. Various strategies have been used to represent coronal polarization. Here, we present a new way to visualize the polarized corona, using observations from the 2023 April 20 total solar eclipse in Australia in support of the Citizen CATE 2024 project. We convert observations in the common four-polarizer orthogonal basis (0°, 45°, 90°, & 135°) to −60°, 0°, and +60° (MZP) polarization, which is homologous to R, G, B color channels. The unique image generated provides some sense of how humans might visualize
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Chattopadhyay, Tanmoy, Abhay Kumar, A. R. Rao, et al. "High Hard X-Ray Polarization in Cygnus X-1 Confined to the Intermediate Hard State: Evidence for a Variable Jet Component." Astrophysical Journal Letters 960, no. 1 (2023): L2. http://dx.doi.org/10.3847/2041-8213/ad118d.

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Abstract Cygnus X-1, the well-known accreting black hole system, exhibits several observational features hinting at an intricate interplay between the accretion disk, its atmosphere known as the corona, and the putative relativistic jet. It has been extensively studied using all available observational methods, including using the newly available technique of sensitive X-ray polarimetry. X-ray polarization characteristics are distinct for coronal and jet emissions. The low X-ray polarization measured below ∼100 keV is understood as arising from the corona. In contrast, the high polarization me
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Kulidzanishvili, V., A. Mayer, V. Mayer, and S. Danik. "The Corona Electropolarimetry during July 11, 1991 Solar Eclipse." International Astronomical Union Colloquium 144 (1994): 529–33. http://dx.doi.org/10.1017/s0252921100025987.

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AbstractThe electropolarimetry of July 11, 1991 eclipse solar corona using the new photoelectric polarimeter of Abastumani Astrophysical Observatory of the Georgian Academy of Sciences, equipped with the IBM computer, is described in this paper.By means of measurable values the isopolarization lines were constructed, which turned out to be stretched along the coronal streamers. The polarization plane has, entirely, radial direction; however, small but real deviations from radiality were established. The errors of measurements of intensity, polarization degree and polarization plane direction a
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Megha, A., M. Sampoorna, K. N. Nagendra, and K. Sankarasubramanian. "Coronal magnetic field measurements using forbidden emission lines." Proceedings of the International Astronomical Union 13, S340 (2018): 61–62. http://dx.doi.org/10.1017/s1743921318001023.

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AbstractThe polarization measurement of coronal forbidden emission lines is the most promising method of determining the direction of magnetic fields in the corona. A classical theory for the forbidden lines was presented in Megha et al. (2017) for the case of arbitrary strength magnetic fields. Here we apply that theoretical formalism to study the effect of density distributions, magnetic field configurations, and velocity fields on the Stokes profiles formed in corona. For illustrations we use the atomic parameters of the [Fe xiii] 10747 Å coronal forbidden line.
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Dissertations / Theses on the topic "Corona polarization"

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Costa, Mauro Miguel. "Estudo dos sistemas poliméricos: poliestireno e poli(metacrilato de metila) dopado com o corante vermelho disperso 1." Universidade de São Paulo, 1999. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-15042014-095801/.

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Neste trabalho foi investigado o comportamento elétrico dos sistemas poliméricos preparados com o poliestireno, PS, e poli(metacri1ato de metila), PMMA, dopados com o corante vermelho disperso 1, DR1. O processo de polarização dos filmes poliméricos foi realizado usando o triodo de corona operando em duas configurações: i) carregamento com corrente de carga constante, ii) com tensão de grade constante. O processo de polarização por corona foi investigado variando-se os parâmetros do processo, tais como: corrente de carga, tempo, temperatura, campo elétrico de saturação e porcentagem de corante
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Ramírez, Ray Fernando Hidalgo. "Atividade solar em comprimentos de onda mm e sub-mm e sua associação com uma ejeção de massa coronal." Universidade Presbiteriana Mackenzie, 2015. http://tede.mackenzie.br/jspui/handle/tede/1304.

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Made available in DSpace on 2016-03-15T19:35:53Z (GMT). No. of bitstreams: 1 Ray Fernando Hidalgo Ramirez.pdf: 3985319 bytes, checksum: 0a36b0e596cb2c3f1eadaccfa8f843ee (MD5) Previous issue date: 2015-06-17<br>Universidade Presbiteriana Mackenzie<br>Solar flares radio emissions provide detailed information on the energy release, particle acceleration, heating processes and plasma conditions at the sites where the radiation is generated. This study focuses in radio emission from millimeter, sub-millimeter and another complementary wavelengths obtained by recent observations that might improve
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Schmeltz, Margaux. "Microscopie de second harmonique résolue en polarisations linéaire et circulaire pour caractériser l'organisation 3D du collagène." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLX074.

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Le collagène est un élément majeur de l'architecture des organes chez les mammifères où il forme diverses structures tridimensionnelles (3D) propres à chaque tissu. La visualisation de cette organisation 3D multi-échelle est cruciale pour comprendre la structuration d'organes tels que la cornée ou la peau et guider l'ingénierie de tissus artificiels, qui doivent être structurés de manière appropriée pour être fonctionnels. L’organisation du collagène est de plus affectée dans de nombreuses pathologies. Caractériser ces désordres tissulaires in situ de manière quantitative constitue ainsi un en
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Mohanakrishna, R. "Hyperspectral and Spectropolarimetric Instrumentation for the Solar Atmosphere." Thesis, 2018. https://etd.iisc.ac.in/handle/2005/5408.

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The Sun is the closest star whose surface can be resolved to great a detail. Understanding the working of Sun helps in understanding a large fraction of stellar system as it falls under the spectral class G2V which is the second most abundant type found in our galaxy. It has been speculated for some time that the layers in the solar atmosphere are coupled to each other and the coupling mechanism would reveal a lot about the dynamics of the Sun and the long standing problem of coronal heating. Thus physical parameters of the solar atmosphere should be obtained simultaneously at differen
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Books on the topic "Corona polarization"

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Ŭiryo pohŏm ŭi pŏp chŏngch'aek: Kich'opŏp inyŏm kwa pŏp silmu. Chimmundang, 2012.

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Book chapters on the topic "Corona polarization"

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Badalyan, O. G., V. N. Obridko, and J. Sýkora. "Relationship between the Green-Line Corona Polarization and Coronal Magnetic Fields." In Solar Polarization. Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-015-9329-8_32.

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Gnedin, Y. N., and E. D. Lopez. "Magnetic Polarimetric Refraction in the Solar Corona." In Solar Polarization. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0231-2_8.

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dos Santos Prezas, Pedro Rafael, Manuel Jorge de Araújo Pereira Soares, Mauro Miguel Costa, and Manuel Pedro Fernandes Graça. "The Corona Triode Charging/Polarization System." In NATO Science for Peace and Security Series B: Physics and Biophysics. Springer Netherlands, 2020. http://dx.doi.org/10.1007/978-94-024-2018-0_3.

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Marat-Mendes, J. N., Maria Raposo, and Paulo-António Ribeiro. "Corona Polarization Effects on Polymer Surfaces." In Equilibrium Structure and Properties of Surfaces and Interfaces. Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3394-8_21.

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Badalyan, O. G., M. A. Livshits, and J. Sykora. "Results of Polarization Observations of the White-Light Corona." In Theoretical and Observational Problems Related to Solar Eclipses. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5492-5_3.

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Fang, Y., P. L. Lamy, and A. Llebaria. "Synthetic Maps of the Brightness and Polarization of the F-Corona." In Origin and Evolution of Interplanetary Dust. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3640-2_40.

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Belenko, I. A., O. I. Bougaenko, I. S. Kim, S. Koutchmy, O. T. Matsuura, and E. Picazzio. "Degree Polarization Distribution in the Solar Corona of 03 November 1994." In Theoretical and Observational Problems Related to Solar Eclipses. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5492-5_4.

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Horváth, Gábor, and Dezső Varjú. "Polarization of the Sky and the Solar Corona During Total Solar Eclipses." In Polarized Light in Animal Vision. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-09387-0_11.

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Wardana, Rebecca, Beate Klösch, and Markus Hadler. "Umwelt in der Krise. Einstellungen zu Klimawandel und Umweltbesorgnis sowie Bereitschaft zu umweltbewusstem Verhalten in Krisenzeiten." In Die österreichische Gesellschaft während der Corona-Pandemie. Springer Fachmedien Wiesbaden, 2022. http://dx.doi.org/10.1007/978-3-658-34491-7_9.

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ZusammenfassungDieser Beitrag widmet sich der Frage, wie sich die Einstellungen zum Klimawandel, die Umweltbesorgnis und die Bereitschaft zu umweltbewusstem Handeln im Laufe der Corona-Krise in der österreichischen Bevölkerung entwickelt haben. In Anbetracht der unmittelbaren Bedrohung durch die Covid-19-Pandemie und deren direkte Auswirkungen auf die österreichische Bevölkerung (Herunterfahren der Wirtschaft, Einschränkungen des sozialen Lebens usw.) liegt die Vermutung nahe, dass das Thema Umwelt in den Hintergrund rückte. Um dies zu untersuchen, wurden drei voneinander unabhängige Datensätz
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Cugnon, P., and J. R. Gabryl. "The Solar Corona: White Light Polarization and Modelling of the Large Scale Electron Density Distribution." In Advances in Solar Research at Eclipses from Ground and from Space. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4325-7_4.

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Conference papers on the topic "Corona polarization"

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Frydrych, D. J., R. G. Hart, and H. E. Townsend. "Effect of Corona Discharge Treatment on the Electrochemical Behavior of Zinc-Filled Organic Coatings on Steel Sheet." In CORROSION 1985. NACE International, 1985. https://doi.org/10.5006/c1985-85385.

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Abstract Zinc-rich organic coatings have been widely utilized on steel for corrosion protection. A disadvantage of these coatings is an inability to provide a significant level of cathodic protection to areas of the steel base exposed at sites of damage to the coating. Our studies led to the discovery that subjecting these coatings to an electrical corona discharge treatment significantly increases galvanic activity. In this study we vary the pigment volume concentration (PVC) of the zinc in coatings and measure the electrochemical behavior of the coatings with and without corona discharge tre
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Smartt, Raymond N., and Domenico Bonaccini. "Fabry-Perot etalons for solar corona spectral measurements." In OSA Annual Meeting. Optica Publishing Group, 1987. http://dx.doi.org/10.1364/oam.1987.mv4.

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Fabry-Perot etalons with birefringent substrates are studied for application to the measurement of the spectral profile of faint solar corona emission lines. The method uses polarization spectral chopping by means of a photoelastic modulator that allows alternate measurements of the radiation within the bandwidth corresponding to the coronal line and orthogonally polarized radiation in a similar adjacent bandwidth. These two bands are isolated from their associated channeled spectra by an interference filter. Electronic subtraction gives the coronal signal. The line profile is obtained by succ
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Gasperini, L., A. Rumi, G. Selleri, D. Fabiani, and P. Seri. "Optimization of Corona Triode Polarization by 2D Electrostatic Mapping." In 2023 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP). IEEE, 2023. http://dx.doi.org/10.1109/ceidp51414.2023.10410529.

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Zhang, J. W., Y. C. Cui, C. Putson, R. T. Liu, and C. L. Liu. "Surface charge accumulation effect of polyimide after temperature controlling corona polarization." In 2016 IEEE International Conference on Dielectrics (ICD). IEEE, 2016. http://dx.doi.org/10.1109/icd.2016.7547821.

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Gasperini, Leonardo, Giacomo Selleri, Davide Pegoraro, and Davide Fabiani. "Corona poling for polarization of nanofibrous mats: advantages and open issues." In 2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP). IEEE, 2022. http://dx.doi.org/10.1109/ceidp55452.2022.9985267.

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Shaw, Joseph A., and Nathan J. Pust. "Dual-polarization lidar identification of ice in a corona-producing wave cloud." In SPIE Optical Engineering + Applications. SPIE, 2011. http://dx.doi.org/10.1117/12.894893.

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Despotović, Željko V., Mirjana Vijatović Petrović, and Jelena Bobić. "Laboratory Experimental Setup for High Voltage Corona Polarization of Thin PVDF Films." In 2024 23rd International Symposium INFOTEH-JAHORINA (INFOTEH). IEEE, 2024. http://dx.doi.org/10.1109/infoteh60418.2024.10496040.

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Bonaccini, D., and Raymond N. Smartt. "Tunable Fabry-Perot interferometer using liquid crystals." In OSA Annual Meeting. Optica Publishing Group, 1988. http://dx.doi.org/10.1364/oam.1988.mx6.

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A liquid crystal Fabry-Perot etalon (LCFPI), in which tuning is achieved via the electrooptic effect, is described. The design is applicable to measurements of the solar emission corona, which requires precise subtraction of the scattered light component from the faint emission signal of the coronal lines. For this, spectral chopping is used, in which the signal from one polarization Fabry-Perot channel positioned in the continuum of the spectrum is subtracted electronically from the tunable orthogonally polarized channel via a polarization modulator. The particular use that we require from th
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Sassen, Kenneth. "In Situ and Remote Sensing Analysis of a Corona-Producing Cirrus Cloud." In Light and Color in the Open Air. Optica Publishing Group, 1997. http://dx.doi.org/10.1364/lcoa.1997.lwb.2.

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On the night of 19 April 1994 coordinated University of North Dakota Citation aircraft and University of Utah polarization lidar data were collected from a lunar corona-producing high altitude cirrus cloud from the DOE Cloud and Radiation Testbed (CART) site near Lamont, OK. In agreement with earlier lidar studies (Sassen 1991), relatively strong laser depolarization was noted near the frigid (-70°C) cloud top, which was located slightly above the tropopause. Although the two-ringed corona was not successfully photographed, the radius of the first red ring was estimated to be 2.5 moon diameter
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Despotović, Željko V., Mirjana Vijatović Petrović, and Jelena D. Bobić. "VISOKONAPONSKI IZVOR NAPAJANJA ZA KORONA POLARIZACIJU TANKIH PVDF FILMOVA." In 36. Savetovanja CIGRE Srbija 2023 Fleksibilnost elektroenergetskog sistema. Srpski nacionalni komitet Međunarodnog saveta za velike električne mreže CIGRE Srbija, 2023. http://dx.doi.org/10.46793/cigre36.0722d.

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The paper presents a high-voltage system for polarization ultra-thin films of polyvinylidene fluoride (PVDF) by means of a high-voltage corona. PVDF is a polymer with unique characteristics, such as piezoelectric and ferroelectric. The perspective of application of these films is in systems for energy harvesting from mechanical vibrating structures that generate a wide frequency spectrum of vibrations. A very important procedure that ensures the functionality of the produced PVDF thin films is high-voltage domain polarization (so-called “poling”). Here, the quality and precision of the high vo
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