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master's thesis
Modeliranje zračenja Sunčeve atmosfere na sub-mm, mm i cm valnim duljinama
Zagreb: University of Zagreb, Faculty of Science, 2014. urn:nbn:hr:217:127265
Kuhar, Matej
University of Zagreb
Faculty of Science
Department of Physics

Institutional repository: Repository of the Faculty of Science

Cite this document

Kuhar, M. (2014). Modeliranje zračenja Sunčeve atmosfere na sub-mm, mm i cm valnim duljinama (Master's thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:127265

Kuhar, Matej. "Modeliranje zračenja Sunčeve atmosfere na sub-mm, mm i cm valnim duljinama." Master's thesis, University of Zagreb, Faculty of Science, 2014. https://urn.nsk.hr/urn:nbn:hr:217:127265

Kuhar, Matej. "Modeliranje zračenja Sunčeve atmosfere na sub-mm, mm i cm valnim duljinama." Master's thesis, University of Zagreb, Faculty of Science, 2014. https://urn.nsk.hr/urn:nbn:hr:217:127265

Kuhar, M. (2014). 'Modeliranje zračenja Sunčeve atmosfere na sub-mm, mm i cm valnim duljinama', Master's thesis, University of Zagreb, Faculty of Science, accessed 23 December 2024, https://urn.nsk.hr/urn:nbn:hr:217:127265

Kuhar M. Modeliranje zračenja Sunčeve atmosfere na sub-mm, mm i cm valnim duljinama [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; 2014 [cited 2024 December 23] Available at: https://urn.nsk.hr/urn:nbn:hr:217:127265

M. Kuhar, "Modeliranje zračenja Sunčeve atmosfere na sub-mm, mm i cm valnim duljinama", Master's thesis, University of Zagreb, Faculty of Science, Zagreb, 2014. Available at: https://urn.nsk.hr/urn:nbn:hr:217:127265

Metadata
TitleModeliranje zračenja Sunčeve atmosfere na sub-mm, mm i cm valnim duljinama
Title (english)Modeling Radiation from the Solar Atmosphere in the sub-mm, mm and cm Wavelength Range
AuthorMatej Kuhar
MentorRoman Brajša (mentor)
MentorMatko Milin (mentor)
Committee memberMatko Milin (predsjednik povjerenstva)
Committee memberRoman Brajša (član povjerenstva)
Committee memberVernesa Smolčić (član povjerenstva)
Committee memberIvica Smolić (član povjerenstva)
Committee memberDenis Sunko (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Physics)
Zagreb
Defense date and country2014-09-12, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract
Na slikama Sunca u milimetarskom području mogu se uočiti područja povećane emisije (visokotemperaturna područja, VTP) i područja povećane apsorpcije (niskotemperaturna područja, NTP). Termičko zakočno zračenje i žiromagnetsko (ciklotronsko) zračenje su procesi koji mogu objasniti temperature sjaja dobivene mjerenjima. Koristimo postupak za računanje temperature sjaja za danu valnu duljinu i model atmosfere koji integrira jednadžbu prijenosa zračenja za termičko zakočno zračenje. Do sada je ovaj postupak primijenjen samo na zračenje valne duljine od 8 mm. Cilj ovog rada je primijeniti modele za različite strukture Sunčeve atmosfere na širi spektar valnih duljina (od 0.3 mm do 1 cm), otprilike jednak onome na kojem radi Atacama Large Millimeter/submillimeter Array (ALMA) te dobivene rezultate usporediti s dostupnim mjerenjima. Zaključujemo kako je termičko zakočno zračenje dominantni mehanizam zračenja na submilimetarskim i milimetarskim valnim duljinama koji može objasniti dosadašnja mjerenja intenziteta zračenja Sunca. U bliskoj budućnosti, rezultati modela će se moći usporediti s novim mjerenjima pomoću teleskopa ALMA.
Abstract (english)
Maps of the Sun in millimeter wavelength range reveal emission features (high temperature regions, HTR) and apsorptive features (low temperature regions, LTR). Thermal bremsstrahlung and gyromagnetic (cyclotron) radiation mechanism can be important for explaining the observed phenomena. We use a procedure for calculating the brightness temperature for a given wavelength and model atmosphere, which integrates the radiative transfer equation for thermal bremsstrahlung. Until now, it has been used just for the radiation with wavelength of 8 mm. The aim of the present work is to apply the models for different structures of the solar atmosphere on a broader wavelength range (from 0.3 mm to 1 cm), closely related to that of Atacama Large Millimeter/submillimeter Array (ALMA), and to compare the results with observations. We conclude that thermal bremsstrahlung is the only important radiation mechanism in the submillimeter and millimeter wavelength range, which can explain previous observations of the Sun’s intensity of radiation. In the near future, we will be able to compare the results of our models to new observations of ALMA telescope.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:127265
Study programmeTitle: Physics; specializations in: Research
Course: Research
Study programme type: university
Study level: integrated undergraduate and graduate
Academic / professional title: magistar/magistra fizike (magistar/magistra fizike)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2017-06-14 15:20:31