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Created 19.7.2026
Updated 21.7.2026

Biography
Georgi Raykov Ivanov
(04.08.1942 – 01.12.2021)

Born in Tatarevo vilage, Haskovo region

Education

He graduated physics from the Sofia University (1968)

Georgi Ivanov defended his Ph.D. thesis (1975)

He became ScD (1993)

Scientific Research

He studied OB associations, starformation, nearby galaxies as Andromeda, stellar photometry, and distances in the universe

Professional Experiance

He worked in the Varna Astronomical Observatory Zapochva in the beginning

Georgi Ivanov has elected associate professor (1984) and full professor (1996) in the Sofia University Astronomical Department

He became i.d. dean (1991–1993) and head of the Astronomical department (1993–2003)

Teaching activities

He lectured astronomy

Publications

  1. N. Nikolov, G. Ivanov, Normal Color Indices of Cepheids. III, Astronomicheskii Zhurnal, Vol. 47, p. 1004 (1970)

  2. N. Nikolov, G. Ivanov, Normal Color Indices of Cepheids. III, Soviet Astronomy, Vol. 14, p. 806 (1971)

  3. G. Ivanov, Determination of cepheid intrinsic colours from the periods and amplitudes, Astronomicheskii Tsirkulyar, No. 798, p. 3 - 6 (1973)

  4. N. Nikolov, G. Ivanov, Intrinsic colours of cepheid variables, Perem. Zvezdy, Byull. (Tom 19) 207-225 (1973)

  5. G. Ivanov, Comparative investigation of photographic and photovisual objectives of an astrograph of the Main Astronomical Observatory of the Ukrainian Academy of Sciences, Astrometr. Astrofiz., Vyp. (No.) 21, p. 21-29 (1974)

  6. N. Nikolov, G. Ivanov, On the UV-Excesses of Cepheid Variables, Astronomische Nachrichten, volume 296, p. 207 (1974)

  7. N. Nikolov, G. Ivanov, UV-excesses and the metal abundance of classical cepheids, Astronomicheskii Tsirkulyar, No. 836, p. 2-5 (1974)

  8. N. Nikolov, G. Ivanov, Normal Cepheid color indices. IV, Soviet Astronomy, Vol. 18, p. 77 (1974); Astronomicheskii Zhurnal, Vol. 51, p.132 (1974)

  9. N. Nikolov, G. Ivanov, Standard U-B color indices of Cepheids, Astrofizicheskie Issledovaniia, vol. 1, 1975, p. 25-46. In Russian

  10. G. Ivanov, Luminosities of classical cepheids and the value of the factor "p", Astronomicheskii Tsirkulyar (No. 875) 3-4 (1975)

  11. N. Nikolov, G.; Ivanov, Intrinsic U-B Colours of Cepheid Variables, Astrophysical Investigations, Vol. 1, p.20 (1975)

  12. N. Iakimova, N. Nikolov, G. Ivanov, On the structure of the Cepheid instability strip, In: Variable stars and stellar evolution; Proceedings of the Symposium, Moscow, USSR, July 29-August 4, 1974. (A76-13026 03-90) Dordrecht, D. Reidel Publishing Co., 1975, p. 201-222.

  13. N. Yakimova, N. Nikolov, G. Ivanov, On the Structure of the Cepheid Instability Strip (review), Variable Stars and Stellar Evolution; Proceedings of the Symposium, Moskovskii Gosudarstvennyi Universitet, Moscow, USSR, July 29-August 4, 1974. Edited by V. E. Sherwood and L. Plaut. Symposium sponsored by the International Astronomical Union Dordrecht, D. Reidel Publishing Co. (IAU Symposium, No. 67), 1975., p.201

  14. N. Nikolov, G. Ivanov, A new list of colour excesses of cepheids, Perem. Zvezdy, Byull. (Tom 20) 63-73 (1975)

  15. G. Ivanov, On an investigation of the objectives of a double long-focus astrograph of the Main Astronomical Observatory of the Academy of Sciences of the Ukrainian SSR, Observational problems of astronomy, p. 35 (1976)

  16. G. Ivanov, N. Nikolov, Classical cepheids and the structure of our Galaxy, Stars and galaxies from observational points of view, p. 405-412 (1976)

  17. G. Ivanov, N. Nikolov, On the Pulsation Mode of s-Cepheids, Astrophysical Letters, Vol. 17, p.115 (1976)

  18. G. Ivanov, M. Mitev, Reddening lines of classical cepheids on the UBV two-colour diagram, Astronomicheskii Tsirkulyar (No. 992) 1-2 (1978)

  19. G. Ivanov, N. Nikolov, A Discussion of the Cepheid Amplitude Behaviour in the Instability Strip, Astrophysics and Space Science, Volume 60 (2) 329-334 (1979)

  20. G. Ivanov, Determination of radii and luminosities of classical Cepheids by using Wesselink's method, Astronomicheskii Tsirkulyar, Vol. 1136, p. 1-3 (1980)

  21. N. Nikolov, G. Ivanov, Cepheid instability strip investigation with U-B intrinsic colours, Astronomicheskii Tsirkulyar No.1166, 1981, p.1

  22. Y. Efremov, G. Ivanov, The Ageing of Cepheids across the Spiral Arm Carina / Sagittarius, Astronomicheskii Tsirkulyar No.1166, 1981, p.1

  23. G. Ivanov, On the possible low value of the pulsational masses of small-amplitude cepheids (s-type), Astronomicheskii Tsirkulyar, Vol. 1166, p. 3-4 (1981)

  24. G. Ivanov, A. Gatchev, N. Petrov, Ultraviolet Excesses of Classical Cepheids, Astronomicheskii Tsirkulyar No.1197, 1981, p.1

  25. G. Ivanov, A. Gachev, N. Petrov, On ultraviolet excesses of classical cepheids, Astronomicheskii Tsirkulyar, No. 1198, p. 6-8 (1981)

  26. N. Nikolov, G. Ivanov, Cepheid Instability Strip Investigation with U-B Intrinsic Colours, Astrophysical Investigations, Vol. 3, p. 1 (1981)

  27. G. Ivanov, Cosmological Friedmann models with non-linear scalar field, Gravitatsiya i teor. otnositel'nosti, Kazan (No. 18) 54-60 (1981)

  28. A. Sharov, G. Ivanov, Possible Hubble-Sandage Objects among Variables Discovered in the Andromeda Galaxy, Information Bulletin on Variable Stars, No. 1912, #1 (1981)

  29. Y. Efremov, G. Ivanov, N. Nikolov, Cepheid Space Distribution and the Structure of the Galaxy, Astrophysics and Space Science, Volume 75 (2) 407-421 (1981)

  30. Y. Efremov, G. Ivanov, High Luminosity Stars and the Structure of a Spiral Arm in M31, Soviet Astronomy Letters, vol. 7, May-June 1981, p. 143-146. Translation Pisma v Astronomicheskii Zhurnal, vol. 7, May 1981, p. 259-264

  31. Y. Efremov, G. Ivanov, High-luminosity stars and the structure of a spiral arm in M31, Pisma v Astronomicheskii Zhurnal, vol. 7, May 1981, p. 259-264. Soviet Astronomy Letters, vol. 7, May-June 1981, p. 143-146. Translation

  32. G. Ivanov, Radii and Luminosities of Classical Cepheids, Astrophysics and Space Science, Volume 79 (1) 107-117 (1981)

  33. G. Ivanov, P. Kovachev, The Spectrum / Color Relation for the Supergiants and Cepheids, Astronomicheskii Tsirkulyar No.1246, 1982, p.6

  34. N. Nikolov, G. Ivanov, On the Problem of Cepheid Amplitude Dependence on the Star Position in the Instability Strip, Compendium in Astronomy, a Volume Dedicated to Professor John Xanthakis on the Occasion of Completing Twenty-Five Years of Scientific Activities as Fellow of the National Academy of Athens. Edited by Elias G. Mariolopoulos, Pericles S. Theocaris, and L.N. Mavridis. Dordrecht: D. Reidel Publishing Company, 1982, p.277, 1982

  35. I. Efremov, G. Ivanov, The gradient of the brightest star age and density across the spiral arm S4 in the Andromeda galaxy, Astrophysics and Space Science, Volume 86 (1) 117-129 (1982)

  36. G. vanov, P. Nicolov, Intrinsic Color Indexes U-B/0 for Cepheids, Astronomicheskii Tsirkulyar No.1281, 1983, p.5

  37. G. Ivanov, Y. Efremov, N. Nikolov, The Catalogue of Distances and Light Absorption for Cephieds, Peremennye Zvezdy (Volume 21) p. 861 (1983)

  38. G. Ivanov, The Aging of Open Clusters across Galactic Spiral Arms, Soviet Astronomy Letters, vol. 9, Mar.-Apr. 1983, p. 107-109. Translation Pisma v Astronomicheskii Zhurnal, vol. 9, Apr. 1983, p. 200-205

  39. G. Ivanov, The gradient of open clusters age across the spiral arms of the galaxy, Pisma v Astronomicheskii Zhurnal, vol. 9, Apr. 1983, p. 200-205 Soviet Astronomy Letters, vol. 9, Mar.-Apr. 1983, p. 107-109. Translation

  40. G. Ivanov, N. Nikolov, Period / Luminosities Relation of Classical Cepheids, Astrophysics and Space Science, Volume 94, Issue 1, pp. 191-200

  41. G. Ivanov, Propagation of small perturbations in a cold collisionless electron plasma situated in a Friedmann world, Gravitatsiia i Teoriia Otnositel'nosti, no. 21, 1984, p. 106-112. In Russian

  42. V. Golev, G. Ivanov, N. Nikolov, Some applications of signal-to-noise in photographic stellar photometry, Occas. Rep. R. Obs., Edinb. (No. 14) 269-277 (1984)

  43. V. Golev, G. Ivanov, N. Nikolov, Some applications of signal-to-noise in photographic stellar photometry, In Royal Observatory Astron. Phot. 1984 p 269-277 (SEE N85-16102 07-35)

  44. G. Ivanov, Wesselink Radii of 33 Classical Cepheids, Astrophysics and Space Science, Volume 105 (2) 369-372 (1984)

  45. G. Ivanov, V. Golev, On the dust absorption in the Andromeda galaxy, Astronomicheskii Tsirkulyar, Vol. 1352, p. 1 (1984)

  46. Y. Efremov, G. Ivanov, An interpretation of photometric profile of M 31 along its major axis, Astronomicheskii Tsirkulyar, Vol. 1352, p. 4 (1984)

  47. P. Kunchev, G. Ivanov, New Stellar Associations in M33 Galaxy, Astrophysics and Space Science, Volume 106 (2) 371-379 (1984)

  48. Ts. Georgiev, G. Ivanov, B. Bilkina, Distribution of surface strength transversal to spiral arms in Andromeda Galaxy, Bolgarskaia Akademiia Nauk, Doklady, vol. 38 (8) 957-959 (1985)

  49. Ts. Georgiev, G. Ivanov, Distribution of surface brightness across the spiral arm S4 in the Andromeda galaxy, Pisma v Astronomicheskii Zhurnal (vol. 11) p. 178-183 (1985) Soviet Astronomy Letters, vol. 11, Mar.-Apr. 1985, p. 73-75. Translation

  50. Ts. Georgiev, G. Ivanov, Surface Brightness Distribution across M31 Arm S4, Soviet Astronomy Letters (vol. 11) 73-75 (1985) Translation Pisma v Astronomicheskii Zhurnal, vol. 11, Mar. 1985, p. 178-183

  51. Ts. Georgiev, B. Bilkina, G. Ivanov, On surface photometry of M31 with a 50/70-cm Schmidt telescope, Astronomical instruments and methods of observations, p. 41-45 (1985)

  52. G. Ivanov, Star-formation mechanism in S4 spiral arm of Andromeda galaxy, Bolgarskaia Akademiia Nauk, Doklady (ISSN 0366-8681), vol. 38, no. 7, 1985, p. 819-822

  53. S. Zlatev, G. Ivanov, A criterion determining the association limits in the Andromeda galaxy, Bolgarskaia Akademiia Nauk, Doklady (ISSN 0366-8681), vol. 38, no. 7, 1985, p. 823, 824

  54. G. Ivanov, R. Kourtev, On the Type of Variability of the Star H42 in the Andromeda Galaxy, Information Bulletin on Variable Stars, No. 2666, #1 (1985)

  55. G. Ivanov, The Structure of the Spiral Arm s4 in Andromeda Galaxy - a Contribution to the Theory of Density Waves, Astrophysics and Space Science, Volume 110 (2) 357-369 (1985)

  56. G. Ivanov, Quality of star images and determination of dimensions of the well-corrected field on plates of wide-angle astrographs, Kinematika i Fizika Nebesnykh Tel, vol. 1, Mar.-Apr. 1985, p. 64-68. In Russian

  57. G. Ivanov, P. Kynchev, Parameters of the spiral arms in M 33, Astronomicheskii Tsirkulyar, Vol. 1373, p. 3-6 (1985)

  58. G. Ivanov, A Cepheid-Like Variable in the Andromeda Galaxy with an Extremely Long Period, Information Bulletin on Variable Stars, No. 2729, #1 (1985)

  59. P. Kunchev, G. Ivanov, The association OB 112 in M 33 galaxy, Astronomicheskii Tsirkulyar, Vol. 1386, p. 1-4 (1985)

  60. G. Ivanov, On the variable S Vul, Astronomicheskii Tsirkulyar, Vol. 1389, p. 7-8 (1985)

  61. G. Ivanov, Investigation of optical characteristics of the astrograph objectivesof the Main Astronomical Observatory (Kiev). Magnitude equation and measurement of coma-like images, Kinematika i Fizika Nebesnykh Tel (ISSN 0233-7665), vol. 1, July-Aug. 1985, p. 78-85. In Russian

  62. G. Ivanov, A new 75-day cepheid in M31, Astrophysics and Space Science, Volume 115 (2) 409-411 (1985)

  63. G. Ivanov, P. Kynchev, Stellar associations in the spiral arm S4 of the Andromeda galaxy, Pisma v Astronomicheskii Zhurnal, vol. 11, Oct. 1985, p. 737-743 Soviet Astronomy Letters, vol. 11, Sept.-Oct. 1985, p. 310-312. Translation

  64. G. Ivanov, P. Kynchev, Stellar Associations in M31 Arm S4, Soviet Astronomy Letters, vol. 11, Sept.-Oct. 1985, p. 310-312. Translation Pisma v Astronomicheskii Zhurnal, vol. 11, Oct. 1985, p. 737-743

  65. G. Ivanov, P. Kunchev, On the Spiral Structure of M33, Astrophysics and Space Science, Volume 116 (2) 341-348 (1985)

  66. G. Ivanov, Cosmological Friedmann models with a charged vacuum, Fizika (ISSN 0021-3411), vol. 28, Dec. 1985, p. 19-24. In Russian

  67. G. Ivanov, Cosmological Friedman models with the charged vacuum, Soviet Physics Journal, Volume 28 (12) 965-969 (1985)

  68. G. Ivanov, P Kunchev, Distribution of luminous blue stars in M 33, Astronomische Nachrichten, Vol. 307, Issue 6, p. 379-383 (1986)

  69. R. Tasheva, G. Ivanov, On the Accuracy of Photographic Photometry at the 2-METER Nao-Rogen Telescope, Astronomicheskii Tsirkulyar (No. 1426) p.3 (1986)

  70. R. Kourtev, G. Ivanov, UBV-photometry of the spiral arm S 5 in M 31, Astronomicheskii Tsirkulyar, Vol. 1435, p. 1-4 (1986)

  71. G.Ivanov, P. Nedyalkov, P. Kynchev, The distribution of the stars across the spiral arm N4 in M 31 galaxy, Astronomicheskii Tsirkulyar, Vol. 1435, p. 6 (1986)

  72. G. Ivanov, P. Kunchev, V. Golev, I. Parov, On M 33 nucleus activity, Astronomicheskii Tsirkulyar, Vol. 1473, p. 3-5 (1986)

  73. G. Ivanov, On the arm pattern of M33, Bolgarskaia Akademiia Nauk, Doklady (ISSN 0366-8681), vol. 39, no. 2, 1986, p. 9-11

  74. P. Kunchev, G. Ivanov, On the characteristics of the high-luminosity OB stars in the M33 galaxy, Bolgarskaia Akademiia Nauk, Doklady (ISSN 0366-8681), vol. 39, no. 12, 1986, p. 5-8.

  75. Y. Efremov, G. Ivanov, N. Nikolov, New Stellar Associations in M31, Luminous Stars and Associations in Galaxies, Proceedings of IAU Symposium No. 116, held 26-31 May 1985 in Porto-Kheli, Greece. Edited by C.W.H. De Loore, A.J. Willis, and P. Laskarides. Dordrecht: D. Reidel Publishing Co., p.389, 1986

  76. G. Ivanov, P. Kunchev, On the Arm Pattern of M33, Luminous Stars and Associations in Galaxies, Proceedings of IAU Symposium No. 116, held 26-31 May 1985 in Porto-Kheli, Greece. Edited by C.W.H. De Loore, A.J. Willis, and P. Laskarides. Dordrecht: D. Reidel Publishing Co., p.419, 1986

  77. L. Berdnikov, G. Ivanov, On the Type of Variability of S Vul, Information Bulletin on Variable Stars, No. 2856, #1 (1986)

  78. P. Kunchev, G. Ivanov, A Photometric Study of the Bright Stars in M33, Astrophysics and Space Science, Volume 122 (2) 235-245 (1986)

  79. L. Berdnikov, G. Ivanov, The Period Amplitude Diagram of the Cepheids, Astrophysics and Space Science, Volume 125 (1) 201-203 (1986)

  80. I. Efremov, G. Ivanov, The Luminosity of Red Supergiants in the Andromeda Galaxy, Astrophysics and Space Science, Volume 129 (1) 39-43 (1987)

  81. G. Ivanov, P. Kunchev, On the luminosity of Hubble-Sandage objects in the M31 galaxy, Dokl. Bolg. Akad. Nauk, Tome 40 (1) 11-12 (1987)

  82. I. Efremov, G. Ivanov, N. Nikolov, Star Complexes and Associations in the Andromeda Galaxy, Astrophysics and Space Science, Volume 135 (1) 119-130 (1987)

  83. V. Golev, G. Ivanov, P. Kunchev, The brightest blue stars in M33 galaxy as unresolved star groups, Astrophysics and Space Science, 135 (2) 301-306 (1987)

  84. G. Ivanov, Stellar Associations and Complexes in M33, Astrophysics and Space Science, Volume 136, Issue 1, pp. 113-128 (1987)

  85. G. Ivanov, ON the Periodicity of Hubble-Sandage Objects in M 31, Physics of luminous blue variables; Proceedings of IAU Colloq. 113, Val Morin, Canada, Aug. 15-18, 1988. Edited by Kris Davidson, A. F. J. Moffat, and H. J. G. L. M. Lamers. Dordrecht and Boston, MA, Kluwer Academic Publishers (Astrophysics and Space Science Library. Volume 157), 1989., p.275

  86. G. Ivanov, Ts. Georgiev, P. Kunchev, The Outermost OB Associations in M33, Astrophysics and Space Science, Volume 159 (1) 103-107 (1989)

  87. Ts. Georgiev, B. Bilkina, G. Ivanov, On the gradients of surface brightness of the Andromeda galaxy, Astrofisik. Issledovanija - Sofia (Vol. 5) 13-22 (1989)

  88. G. Ivanov, Ts. Georgiev, P. Kunchev, The Outermost OB Associations in M33, Astrophysics and Space Science, Volume 159, Issue 1, pp. 103-107 (1989)

  89. P. Nedialkov, R. Kouztev, G. Ivanov, The brightest blue and red stars in M31, Astrophysics and Space Science, Volume 162, Issue 1, pp. 1-11 (1989)

  90. T. Georgiev, R. Getov, V. Zamanova, G. Ivanov, UBV Surface Photometry of Associations - the Distance Modulus of M51, Soviet Astronomy Letters, Vol.16 (6) p. 420 (1990)

  91. Ts. Georgiev, R. Getov, V. Zamanova, G. Ivanov, UBV surface photometry of the associations and estimation of the M 51 distance modulus, Pis'ma Astron. Zu. (Vol. 16) p. 979 (1990)

  92. G. Ivanov, A catalogue of blue stars in M33, 6. Symposium of the Subcommission No. 6 of the Multilateral Cooperation "Physics and evolution of stars": Star clusters and associations, p. 125-133 (1990)

  93. G. Ivanov, Bright associations in M33, 6. Symposium of the Subcommission No. 6 of the Multilateral Cooperation "Physics and evolution of stars": Star clusters and associations, p. 147-161 (1990)

  94. Ts. Georgiev, G. Ivanov, Distribution of blue stars and gas in galaxy M33, Bulletin of the Special Astrophysical Observatory - North Caucasus (Vol. 31) 26-32 (1991)

  95. Ts. Georgiev, G. Ivanov, On the distribution of blue stars and gas in M 33, Astrofisik. Issledovanija - Sofia (Vol. 31) p. 29 (1991)

  96. P. Knchev, G. Ivanov, On the occasion of the 60th birthday of Nikola Stefanov Nikolov, 14 February 1990, Astronomical calendar for the year 1991, p. 99-100 (1991)

  97. G. Ivanov, The Stellar Content of Associations and Star Complexes in M33, Astrophysics and Space Science, Volume 178, Issue 2, pp. 227-249 (1991)

  98. G. Ivanov, Stellar distribution in H II regions of M 33, Monthly Notices of the Royal Astronomical Society, Vol. 251, 281 (1991)

  99. G. Ivanov, A catalogue of stellar associations in M33, Astrophysical Investigations (6) 12-25 (1991)

  100. G. Ivanov, Nonstellar Objects in M33, Astrophysical Letters and Communications, Vol. 28, p.281 (1992)

  101. G. Ivanov, Stellar associations in M 81, Monthly Notices of the Royal Astronomical Society, Vol. 257, 119-124 (1992)

  102. G. Ivanov, G. Popravko, I. Efremov, N. Tikhonov, I. Karachentsev, Stellar associations and aggregates in NGC 628, Astronomy and Astrophysics, Suppl. Ser., Vol. 96, p. 645-652 (1992)

  103. Y. Efremov, G. Ivanov, P. Nedialkov, The distribution of bright stars and HII regions in the andromeda nebula, Astronomical and Astrophysical Transactions, vol. 3, Issue 3, pp.237-249 (1993)

  104. G. Ivanov, W. Freedman, B. Madore, A Catalog of Blue and Red Supergiants in M33, Astrophysical Journal Supplement v.89, p.85 (1993)

  105. G. Ivanov, OB associations in nearby galaxies, Astronomy and Astrophysics, v.305, p.708 (1996)

  106. G. Ivanov, a Criterion for Identification of OB Associations and Star Complexes, Astronomical and Astrophysical Transactions, vol. 9, Issue 4, pp.305-316 (1996)

  107. G. Ivanov, M. Toropova, Surface Photometry of the spiral arms of M51, Astrophysical Investigations, Vol. 7, p.29-31 (1996)

  108. G. Ivanov, W. Freedman, B. Madore, VizieR Online Data Catalog: Blue and red supergiants in M33 (Ivanov+ 1993), VizieR On-line Data Catalog: J/ApJS/89/85. Originally published in: 1993ApJS...89...85I (1996)

  109. P. Nedialkov, N. Tikhonov, R. Kurtev, G. Ivanov, New variables in the north-eastern part of M31, Information Bulletin on Variable Stars, No. 4411, #1 (1996)

  110. G. Ivanov, Cepheid Distribution in the Galaxy, The Earth and the Universe, Volume dedicated to Professor Lyssimachos Mavridis on the occasion of his completing forty-five years of academic activities. Edited by G. Asteriadis, A. Bantelas, M.E. Contadakis, K. Katsambalos, A. Papdimitriou, and I.N. Tziavos. Thessaloniki, Greece: Aristotle University of Thessaloniki, 1997, p.79

  111. L. Georgiev, G. Ivanov, Observational Evidence for Evolutionary Connections between Wolf-Rayet Stars and Red Supergiants, Revista Mexicana de Astronomia y Astrofisica, 33, p. 117- 121 (1997)

  112. G. Ivanov, Cepheid distribution in the Galaxy, Bulg. J. Phys., Vol. 25, No. 3 - 4, p. 188 - 192 (1998)

  113. G. Ivanov, Young massive stellar populations in M 33, Astronomy and Astrophysics, v.337, p.39-42 (1998)

  114. T. Veltchev, P. Nedialkov, G. Ivanov, Star Formation History and Extinction in NGC 206, Revista Mexicana de Astronomia y Astrofisica, Vol. 35, p.13 (1999)

  115. G. Ivanov, Astronomy On The Sofia University, Publications of the Astronomical Observatory of Belgrade (1999) (In Bulgarian)

  116. G. Ivanov, Stellar Populations In M33, Publications of the Astronomical Observatory of Belgrade (ISSN 0373-3742), No. 64, p. 53 - 65 (1999). In: Proceedings of the First Bulgarian-Yugoslav Astronomical Meeting, August 5-8, 1998, Belogradchik, Bulgaria.

  117. T. Veltchev, P. Nedialkov, G. Ivanov, Errata: Star Formation History and Extinction In NGC 206, Revista Mexicana de Astronomia y Astrofisica, Vol. 35, p.229 (1999)

  118. G. Ivanov, K. Krastev, Stellar Associations in NGC 6946, Proceedings of the Second Serbian-Bulgarian Astronomical Meeting. Held June 23-26, 2000, in Zajecar, Serbia. Edited by Milan S. Dimitrijevic, Luka C. Popovic, and Milcho Tsvetkov. Published by the Astronomical Observatory, Volgina 7, 11000 Belgrade, Yugoslavia, p.81 (2000)

  119. K. Panov, G. Ivanov, E. Tsankov, Welcome addresses to the First Meeting for Young Astronomers, In: Balkan Meeting of Young Astronomers, 25 - 29 September 2000, Belogradchik, Bulgaria, edited by Alexander Antov, Renada Konstantinova-Antova, Rumen Bogdanovski and Milcho Tsvetkov, Belogradchik: Belogradchik Astronomical Observatory, 2001, p. 15 - 17

  120. J. Borissova, R. Kurtev, L. Georgiev, M. Rosado, G. Ivanov, IC 1613 OB Associations and Star Cluster Candidates, Extragalactic Star Clusters, IAU Symposium 207, Held in Pucon, Chile March 12-16, 2001. Edited by D. Geisler, E.K. Grebel, and D. Minniti. San Francisco: Astronomical Society of the Pacific, 2002., p.456

  121. G. Ivanov, M. Dimitrijevic, P. Jovanovic, Proceedings of the Third Bulgarian-Serbian Astronomical Meeting, Publications of the Astronomical Observatory of Belgrade (ISSN 0373-3742), No. 73, 269 pp. (2002). Proceedings of the Third Bulgarian-Serbian Astronomical Meeting, May 13-15, 2002, Gjolechitsa, Bulgaria

  122. G. Ivanov, M. Dimitrijevic, V. Shkodrov, Speeches on opening ceremony, Publications of the Astronomical Observatory of Belgrade (ISSN 0373-3742), No. 73, p. 5 - 12 (2002). In: Proceedings of the Third Bulgarian-Serbian Astronomical Meeting, May 13-15, 2002, Gjolechitsa, Bulgaria

  123. O. Vassilev, L. Vassileva, G. Ivanov, D. Vassilev, Red supergiants in M33 galaxy, Publications of the Astronomical Observatory of Belgrade (ISSN 0373-3742), No. 73, p. 257 - 263 (2002). In: Proceedings of the Third Bulgarian-Serbian Astronomical Meeting, May 13-15, 2002, Gjolechitsa, Bulgaria

  124. G. Ivanov, Star complexes in M33, Publications of the Astronomical Society "Rudjer Boskovic" (5) p. 75 (2005)

  125. Г. Иванов, Ролята на академик Никола Бонев за развитието на българската астрономия, Разпространение и развитие на физико-математическите знания в България, А. Г. Петров, Г. Камишева (ред), ИФТТ, София, 2007


    Nicola Bonev
    31.10.2006, 0:53 (in Bulgarian)
    G. Ivanov

  126. G. Ivanov, J. Burov, Nanodimentional Aggregates In Organic Monolayers Studied With Atomic Force Microscopy (AFM) And Fluorescence Lifetime Imaging Microscopy (FLIM), Sixth International Conference of the Balkan Physical Union, AIP Conference Proceedings (Volume 899) 257-258 (2007)

  127. G. Ivanov, Space distribution and clustering of 345 Cepheids in the Milky Way from 2MASS data, Bulgarian Astronomical Journal (Vol. 10) p. 15 (2008)

  128. G. Ivanov, Cepheid Complexes of the Milky Way, Publications of the Astronomical Society "Rudjer Boskovic" (9) 35-44 (2009)

  129. T. Veltchev, N. Koleva, P. Nedialkov, G. Ivanov, Two generations in stellar complexes and associations in M 33 galaxy and their spatial correlation, Proc. VI Serbian-Bulgarian Astronomical Conference, Belgrade 7-11 May 2008, Eds. M. S. Dimitrijeviь, M. Tsvetkov, L. э. Popoviь, V. Golev, Publ. Astr. Soc. "Rudjer Boљkoviь" (9) 449-456 (2009)

  130. T. Veltchev, N. Koleva, P. Nedialkov, G. Ivanov, Two generations in stellar complexes and associations in M33 galaxy and their spatial correlation, Publications of the Astronomical Society "Rudjer Boskovic" (9) 449-456 (2009)

  131. V. Ivanov, M. Messineo, Q. Zhu, D. Figer, J. Borissova, R. Kurtev, G. Ivanov, Infrared surveys of Galactic star clusters, Star clusters: basic galactic building blocks throughout time and space, Proceedings of the International Astronomical Union, IAU Symposium (Volume 266) 203-210 (2010)

References

  1. В. Тущеров, Obituary, 04.12.2021 (in Bulgarian)

  2. Тъжен помен 1 година от смърта на Георги Райков Иванов, 02.12.2022

  3. D. Kolev, Българската астрономия от Йоан Екзарх до наши дни, Bulgarian Astronomical Journal (15) (2011)

  4. В. Голев, А. Антонова, Л. Филипова, Катедра Астрономия - години на растеж, Годишник на Софийския университет, Физически факултет, София (2015)

  5. Publications

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