Damghan University Press Iranian Journal of Astronomy and Astrophysics 2322-4924 2 1 2015 04 01 AGN Zoo and Classi cations of Active Galaxies 1 38 15 10.22128/ijaa.2015.15 EN Areg M. Mickaelian Byurakan Astrophysical Observatory (BAO), Byurakan 0213, Aragatzotn Province, Armenia; 0000-0002-6598-1060 Journal Article 2015 07 01 We review the variety of Active Galactic Nuclei (AGN) classes (so-called\AGN zoo") and classification schemes of galaxies by activity types based on their optical emission-line spectrum, as well as other parameters and other than optical wave-length ranges. A historical overview of discoveries of various types of active galaxies is given, including Seyfert galaxies, radio galaxies, QSOs, BL Lacertae objects, Star-bursts, LINERs, etc. Various kinds of AGN diagnostics are discussed. All known AGN types and subtypes are presented and described to have a homogeneous classification scheme based on the optical emission-line spectra and in many cases, also other parameters. Problems connected with accurate classifications and open questions related to AGN and their classes are discussed and summarized. AGN quasars Seyfert galaxies LINERs Starburst galaxies radio galaxies jets https://ijaa.du.ac.ir/article_15_a3b9856ff1139588af83f01467eadb81.pdf
Damghan University Press Iranian Journal of Astronomy and Astrophysics 2322-4924 2 1 2015 04 01 Structure of proper motions in a sunspot penumbra 39 57 16 10.22128/ijaa.2015.16 EN H. Hamedivafa Physics Department, Faculty of Science, Imam Khomeini International University, Qazvin 34149-16818, Islamic Rep. of Iran; Journal Article 2015 07 01 https://ijaa.du.ac.ir/article_16_44d09ff909544626f0bc8d1ba12bd2db.pdf
Damghan University Press Iranian Journal of Astronomy and Astrophysics 2322-4924 2 1 2015 04 01 Reconstruction of Solar Coronal Linear Force-Free Magnetic Field 59 67 17 10.22128/ijaa.2015.17 EN Marjan Yousefzadeh Department of Physics, Faculty of Science, University of Zanjan, Daneshgah Blvd., Zanjan, 45371-38791, Iran; Sadollah Nasiri Department of Physics, Faculty of Science, Shahid Beheshti University, Daneshju Blvd., Tehran, 1983963113, Iran; 0000-0001-8271-8160 Hossien Safari Department of Physics, Faculty of Science, University of Zanjan, Daneshgah Blvd., Zanjan, 45371-38791, Iran; 0000-0003-2326-3201 Journal Article 2015 07 01 https://ijaa.du.ac.ir/article_17_7a6deaf08c8bc76a7701be80a59519bf.pdf
Damghan University Press Iranian Journal of Astronomy and Astrophysics 2322-4924 2 1 2015 04 01 Segmentation of Photospheric Solar Images by Using c-Means,k-Means, and FCM Algorithms 69 76 18 10.22128/ijaa.2015.18 EN Mahdi Yousefzadeh Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, P.O.Box 45195-1159, Iran Mohsen Javaherian Department of Physics, University of Zanjan, Zanjan, P.O.Box 45195313, Iran 0000-0003-0464-1561 Hossein Safari Department of Physics, University of Zanjan, Zanjan, P.O.Box 45195313, Iran Journal Article 2015 07 01 https://ijaa.du.ac.ir/article_18_8e8dd47b52d32eec8e46cbeb26e9ce37.pdf
Damghan University Press Iranian Journal of Astronomy and Astrophysics 2322-4924 2 1 2015 04 01 Seismology of solar spicules based on Hinode/SOT observations 77 83 19 10.22128/ijaa.2015.19 EN Vahid Abbasvand Astrophysics Departartment, Physics Faculty, University of Tabriz, Tabriz, Iran; Hossein Ebadi Astrophysics Departartment, Physics Faculty, University of Tabriz, Tabriz, Iran; Zahra Fazel Astrophysics Departartment, Physics Faculty, University of Tabriz, Tabriz, Iran; 0000-0001-8267-9528 Journal Article 2015 07 01 https://ijaa.du.ac.ir/article_19_b5a4d68545fee2aba642b24326259725.pdf
Damghan University Press Iranian Journal of Astronomy and Astrophysics 2322-4924 2 1 2015 04 01 The study of Hydrodynamical wind on the observational properties of magnetized accretion flow with thermal conduction 85 96 20 10.22128/ijaa.2015.20 EN Maryam Ghasemnezhad Faculty of physics, Shahid Bahonar University of Kerman, Kerman, Iran Journal Article 2015 07 01 https://ijaa.du.ac.ir/article_20_95e77b10cb8a75b7c47b08db00d7bc2e.pdf
Damghan University Press Iranian Journal of Astronomy and Astrophysics 2322-4924 2 1 2015 04 01 Callibration of a homemade 4-fold Water Cherenkov Detector array, by detection of EAS events 97 107 21 10.22128/ijaa.2015.21 EN Mehdi Khakian Ghomi Energy engineering and physics department, Amirkabir univ. of tech., 15875-4413, Tehran, Iran. Mahmood Bahmanabadi Department of Physics, Sharif Univ. of Tec h., 11555-9161, Tehran, Iran Hadi Hedayati Kh. Department of Physics, K.N. Toosi Univ. of Tec h., 15875-4416, Te hr an, Iran Journal Article 2015 08 17 https://ijaa.du.ac.ir/article_21_21f7f6ef25a62ad7dbe6a51b91ff7c0c.pdf