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Hashem Hamedivafa

Assistant Professor

Update: 2025-09-21

Hashem Hamedivafa (Faculty Member)

Faculty of Sciences /

Journal Paper

  1. "Abnormal Stokes V profiles observed by Hinode in a sunspot Detection of hidden photospheric fine-structures"
    Hashem Hamedivafa, Reza Rezaei
    ASTRONOMY and ASTROPHYSICS, Vol. 691, pp.274-285, 2024
  2. "Detecting a New Type of Stokes V Profiles Observed by Hinode in a Sunspot"
    Hashem Hamedivafa
    Iranian Journal of Astronomy and Astrophysic, Vol. 10, pp.139-152, 2023
  3. "The Role of Sunspots Magnetic Configuration in the Formation of Umbral Fine-Structures"
    Hashem Hamedivafa
    Iranian Journal of Astronomy and Astrophysic, Vol. 10, pp.111-120, 2023
  4. "Comparative Study of a Sunspot at Two Different Instances of Time"
    Hashem Hamedivafa
    SOLAR PHYSICS, Vol. 295, pp.1-4, 2020
  5. "A study on Ca II 854.2 nm emission in a sunspot umbra using a thin cloud model"
    Hashem Hamedivafa, Michal Sobotka, Luis Bellot Rubio, Sara Esteban Pozuelo
    Iranian Journal of Astronomy and Astrophysic, Vol. 3, pp.25-45, 2016
  6. "Structure of proper motions in a sunspot penumbra"
    Hashem Hamedivafa
    Iranian Journal of Astronomy and Astrophysic, Vol. 2, pp.39-57, 2015
  7. "Photospheric Stratification of a Central Umbral Dot Using Stokes Profiles Recorded by Hinode A Different Single-Case Study"
    Hashem Hamedivafa
    SOLAR PHYSICS, Vol. 286, pp.327-346, 2013
  8. "Kinematics of Umbral Dots Their Typical Area Brightness and Lifetime"
    Hashem Hamedivafa
    SOLAR PHYSICS, Vol. 270, pp.75-88, 2011
  9. "Kinematics of Umbral Fine Structure"
    Michal Sobotka, K. G. Puschmann, Hashem Hamedivafa
    Central European Astrophysical Bulletin, Vol. 32, pp.125-132, 2008
  10. "Application of an improved method of image segmentation and some consideration on identification and tracking of umbral dots"
    Hashem Hamedivafa
    SOLAR PHYSICS, Vol. 250, pp.17-29, 2008
  11. "Observational evidence of Joule heating in some umbral dots"
    Hashem Hamedivafa, Michal Sobotka
    ASTRONOMY and ASTROPHYSICS, Vol. 428, pp.215-218, 2004
  12. "Considerations of Joule heating and radius reduction in umbral dots"
    Hashem Hamedivafa
    ASTRONOMY and ASTROPHYSICS, Vol. 407, pp.761-767, 2003
  13. "The dependence of the magnetic field strength of a sunspot umbra on its intensity and brightness temperature"
    Hashem Hamedivafa
    Iranian Journal of Astronomy and Astrophysic, Vol. 4, pp.79-95, 2017

Conference Paper

  1. "Finding gamma ray events by the method of obtaining poisson distribution from data collected by an array of Cherenkov"
    شیما بایسته, مهدی خاکیان قمی, Hashem Hamedivafa, فرزانه شیدایی, محمود بهمن آبادی
    31st International Cosmic Ray Conference (ICRC), 2009
  2. "Study on Extensive Air Showers with a small array of Water Cherenkov Detectors"
    فرزانه شیدایی, شیما بایسته, محمود بهمن آبادی, مهدی خاکیان قمی, جلال صمیمی, Hashem Hamedivafa
    the 4th International Meeting on High Energy Gamma-Ray Astronomy (AIP Conference Proceedings), 2008
  3. "Reconsidering and refining two old observational data to find the typical size of umbral dots"
    Hashem Hamedivafa
    26th meeting of the International Astronpmical Union (IAU), No 26 , pp.274-274, 2006
  4. "Surveying of Astronomy Education in Islamic Republic of Iran II. Bachelor's Degree in Astronomy and Astrophysics"
    Hashem Hamedivafa
    15th National Conference on Astronomy and Astrophysics of Iran, 2022
  5. "Mutual effects of penumbral microjets and the photosphere below"
    محمد الاخرس, Hashem Hamedivafa, Reza Rezaei
    15th National Conference on Astronomy and Astrophysics of Iran, No 15 , pp.48-51, 2022
  6. "Morphology and Apparent Properties of Penumbral Microjets"
    محمد الاخرس, Hashem Hamedivafa, Reza Rezaei
    15th National Conference on Astronomy and Astrophysics of Iran, No 15 , pp.78-81, 2022
  7. "بازنگری آموزش نجوم در ایران (ضرورت بازنگری)"
    Hashem Hamedivafa
    22مین گردهمایی پژوهشی نجوم ایران, No 22 , pp.7-9, 2019
  8. "اندازه گیری فاصله به روش اختلافمنظر مثلثاتی"
    Hashem Hamedivafa
    22nd Meeting on Research in Astronomy, No 22 , pp.46-50, 2019
  9. "تفکیک نمایه های غیرعادی استوکس رصدی به منظور بهبود دقت در یافتن ساختار حرارتی و مغناطیسی رشته های نیمسایه ای لکه های خورشیدی"
    Hashem Hamedivafa, noshin jamshidi
    ششمین همایش ملی نجوم و اخترفیزیک, No 6 , pp.57-60, 2013
  10. "Analysis of the 2-Color Photometry of Umbral Dots Using Hinode Data Area and Contrast"
    Hashem Hamedivafa, سولماز امیربیگلوبالینی
    5th conference on Astronomy and Astrophysics, No 5 , pp.356-360, 2011
  11. "جستجوی جریان های همرفتی در نیمسایه یک لکه خورشیدی"
    وحید اسدی, Hashem Hamedivafa
    Annual Physics Conference of Iran, pp.1404-1407, 2011
  12. "لایه بندی شیدسپهری خالهای سایه ای محیطی با استفاده از داده های Hinode SOT/SP"
    Hashem Hamedivafa, Maryam Rahmani
    Annual Physics Conference of Iran, pp.495-498, 2011
  13. "Photospheric Stratification of a Sunspot Umbral Dot from Inversion of Stokes Profiles Recorded by HINODE"
    Hashem Hamedivafa
    15th meeting on research in astronomy, pp.306-309, 2011
  14. "Magnetic and Thermal Structure of Penumbral Filaments Observed with HINODE Solar Optical Telescope"
    Nooshin Jamshidi, Zahra Ammar Loo, Hashem Hamedivafa
    15th meeting on research in astronomy, pp.150-153, 2011
  15. "Statistical Properties of Umbral Dots"
    Hashem Hamedivafa
    14 th Meeting on Research Astronomy, pp.29-32, 2010
  16. "The Thermal and Magnetic Structure of Peripheral Umbral Dots"
    Maryam Rahmani, Hashem Hamedivafa
    14 th Meeting on Research Astronomy, pp.40-43, 2010
  17. "تفکیک و ردیابی ساختارهای سطح خورشید در تصاویر رصدی با توان تفکیک بالا. I. قطعه بندی تصاویر"
    Hashem Hamedivafa
    گردهم آیی پژوهشی نجوم ایران, pp.90-93, 2007