Zdenek Sekanina

Zdenek Sekanina

Zdenek Sekanina (Mladá Boleslav, 12 giugno 1936) è un astronomo ceco naturalizzato statunitense.

Zdenek Sekanina è un astronomo statunitense di origine ceca. Ha studiato all'Università Carolina a Praga, laureandosi nel 1959 e conseguendo il dottorato nel 1963[1]. Sekanina è membro dell'Unione Astronomica Internazionale e partecipa ai lavori della Sezione III, nelle Commissioni 15, 20 e 22[2].

Carriera

Ha lavorato al Jet Propulsion Laboratory dal 1980: continua a scrivere articoli d'Astronomia anche se attualmente è pensionato. Si è occupato dello studio delle meteore e della materia interplanetaria, ma fin dall'Università la sua carriera è stata rivolta in particolare allo studio delle comete[1]. Tra le sue ricerche sono degni di nota gli studi sulla cometa Halley[3][4][5][6][7], sulla frammentazione dei nuclei cometari[8], sull'evento della Tunguska[9], sulla disintegrazione e l'impatto col pianeta Giove della cometa Shoemaker-Levy 9[10]. Ha partecipato allo studio dei dati ricevuti da varie missioni spaziali: Giotto[11], Stardust[12] e SOHO[13][14][15].

Pubblicazioni

Selezione di articoli

  • settembre 1983 "The Tunguska event: no cometary signature in evidence." [16]
  • settembre 1992 "Major outburst of periodic Comet Halley at a heliocentric distance of 14 AU" [17]
  • gennaio 1998 "Secondary fragmentation of comet Shoemaker-Levy 9 and the ramifications for the progenitor's breakup in July 1992" [18]
  • febbraio 1998 "Evidence for asteroidal origin of the Tunguska object" [19]
  • dicembre 2002 "FRAGMENTATION ORIGIN OF MAJOR SUNGRAZING COMETS C/1970 K1, C/1880 C1, AND C/1843 D1" [20]
  • dicembre 2005 "ORIGIN OF THE MARSDEN AND KRACHT GROUPS OF SUNSKIRTING COMETS. I. ASSOCIATION WITH COMET 96P/MACHHOLZ AND ITS INTERPLANETARY COMPLEX" [21]
  • settembre 2015 "WAS COMET C/1945 X1 (DU TOIT) A DWARF, SOHO-LIKE KREUTZ SUNGRAZER?" [22]
  • settembre 2021 "NEW MODEL FOR THE KREUTZ SUNGRAZER SYSTEM: CONTACT-BINARY PARENT AND UPGRADED CLASSIFICATION OF DISCRETE FRAGMENT POPULATIONS" [23]
  • settembre 2021 "ENIGMATIC NEBULOUS COMPANIONS TO THE GREAT SEPTEMBER COMET OF 1882 AS SOHO-LIKE KREUTZ SUNGRAZERS CAUGHT IN TERMINAL OUTBURST" [24]
  • ottobre 2021 "ESTIMATING DIMENSIONS OF THE NUCLEUS OF GREAT SEPTEMBER COMET OF 1882 FROM MOTIONS OF ITS FRAGMENTS" [25]
  • dicembre 2022 "POPULATIONS OF THE KREUTZ SUNGRAZER SYSTEM IN A SOHO DATABASE" [26]
  • aprile 2023 "ON ELUSIVE OBSERVATIONS AND A SLY COMPANION OF COMET WIRTANEN (C/1956 F1)" [27]
  • maggio 2023 "ON THE EXISTENCE OF A SUPER-KREUTZ SYSTEM OF SUNGRAZING COMETS [28]
  • luglio 2023 "FRAGMENTATION AND HISTORY OF COMET PAIR C/1844 Y1 AND C/2019 Y4" [29]
  • ottobre 2023 "SPECTACULAR POST-PERIHELION TAILS OF BRIGHT KREUTZ SUNGRAZERS" [30]

Selezione di libri

  • Zdenek Sekanina & Richard Boynton Southworth, Physical and Dynamical Studies of Meteors: Meteor-fragmentation and Stream-distribution Studies, Final Report Smithsonian Astrophysical Observatory, Cambridge (MA), novembre 1975
  • Zdenek Sekanina & Fry, Lori, The Comet Halley archive: Summary volume, edito da Zdenek Sekanina e Lori Fry, pubblicato da International Halley Watch, Jet Propulsion Laboratory, NASA, Pasadena, agosto 1991

Riconoscimenti

Nel 1985 ha ricevuto la Exceptional Scientific Achievement Medal [31]

Nel 2006 la Czech Astronomical Society (CAS) gli ha assegnato il premio Nušl[32].

L'asteroide 1913 Sekanina è stato così denominato in suo onore.

Note

  1. ^ a b JPL Science: Zdenek Sekanina, su science.jpl.nasa.gov. URL consultato il 30 dicembre 2021.
  2. ^ International Astronomical Union | IAU, su iau.org. URL consultato il 30 dicembre 2021.
  3. ^ (EN) Z. Sekanina e S. M. Larson, Dust jets in comet Halley observed by Giotto and from the ground, in Nature, vol. 321, n. 6067, 1986-05, pp. 357–361, DOI:10.1038/321357a0. URL consultato il 30 dicembre 2021.
  4. ^ (EN) Zdenek Sekanina, S.M. Emerson, Eleanor Francis Helin, R.E. Schmidt, Sunward spike and equatorial plane of Halley's Comet, Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet (Esa), vol. 2 (Dust and Nucleus), pag. 177-181, dicembre 1986
  5. ^ (EN) Zdenek Sekanina, The Halley dust model, Topical Meeting and Symposium on Recent Researches into Solid Bodies and Magnetic Fields in the Solar System, Ottawa, Canada, 16 maggio - 2 giugno 1982 (COSPAR, IUTAM, IAU e IUGS), Advances in Space Research, vol. 2, n. 12, 1982, pag. 121-131
  6. ^ (EN) Zdenek Sekanina, S.M. Emerson, O. West, Major outburst of periodic Comet Halley at a heliocentric distance of 14 AU, Astronomy and Astrophysics , vol. 263, n. 1-2, pag. 367-386, settembre 1992
  7. ^ (EN) Zdenek Sekanina, Nucleus studies of Comet Halley, Plenary Meeting, 26th, Symposium on Comets Halley and Giacobini-Zinner, 12th, Tolosa, Francia, 30 giugno - 11 luglio 1986 (COSPAR, IAU, IAGA e IAA), Advances in Space Research, vol. 5, n. 12, 1986, pag. 307-316
  8. ^ RECURRING OUTBURSTS AND NUCLEAR FRAGMENTATION OF COMET C/2001 A2 (LINEAR)
  9. ^ INTERNATIONAL WORKSHOP TUNGUSKA 96 July 14-17, 1996
  10. ^ PERIODIC COMET SHOEMAKER-LEVY 9 (1993e) Archiviato il 27 maggio 2010 in Internet Archive.
  11. ^ Stardust - NASA's Comet Sample Return Mission, su solarsystem.nasa.gov. URL consultato il 30 dicembre 2021.
  12. ^ Stardust Sample Return
  13. ^ STATISTICAL INVESTIGATION AND MODELING OF SUNGRAZING COMETS DISCOVERED WITH THE SOLAR AND HELIOSPHERIC OBSERVATORY
  14. ^ IAUC 8983: C/2008 L5-L8, su cbat.eps.harvard.edu. URL consultato il 30 dicembre 2021.
  15. ^ ORIGIN OF THE MARSDEN AND KRACHT GROUPS OF SUNSKIRTING COMETS. I. ASSOCIATION WITH COMET 96P/MACHHOLZ AND ITS INTERPLANETARY COMPLEX Archiviato il 26 maggio 2010 in Internet Archive.
  16. ^ (EN) Zdenek Sekanina, The Tunguska event: no cometary signature in evidence, Astronomical Journal, vol. 88, settembre 1983, pag. 1382-1413
  17. ^ (EN) Sekanina, Z. ; Larson, S. M. ; Hainaut, O. ; Smette, A. ; West, R. M., Major outburst of periodic Comet Halley at a heliocentric distance of 14 AU, Astronomy and Astrophysics, vol. 263, n. 1-2, pag. 367-386, settembre 1992
  18. ^ (EN) Sekanina, Z. ; Chodas, P. W. ; Yeomans, D. K., Secondary fragmentation of comet Shoemaker-Levy 9 and the ramifications for the progenitor's breakup in July 1992, Planetary and Space Science, vol. 46, n. 1, pag. 21-45, gennaio 1998
  19. ^ (EN) Sekanina, Z., Evidence for asteroidal origin of the Tunguska object, Planetary and Space Science, vol. 46, n. 2, pag. 191-204,febbraio 1998
  20. ^ (EN) FRAGMENTATION ORIGIN OF MAJOR SUNGRAZING COMETS C/1970 K1, C/1880 C1, AND C/1843 D1
  21. ^ (EN) ORIGIN OF THE MARSDEN AND KRACHT GROUPS OF SUNSKIRTING COMETS. I. ASSOCIATION WITH COMET 96P/MACHHOLZ AND ITS INTERPLANETARY COMPLEX
  22. ^ (EN) WAS COMET C/1945 X1 (DU TOIT) A DWARF, SOHO-LIKE KREUTZ SUNGRAZER?
  23. ^ (EN) NEW MODEL FOR THE KREUTZ SUNGRAZER SYSTEM: CONTACT-BINARY PARENT AND UPGRADED CLASSIFICATION OF DISCRETE FRAGMENT POPULATIONS
  24. ^ (EN) ENIGMATIC NEBULOUS COMPANIONS TO THE GREAT SEPTEMBER COMET OF 1882 AS SOHO-LIKE KREUTZ SUNGRAZERS CAUGHT IN TERMINAL OUTBURST
  25. ^ (EN) ESTIMATING DIMENSIONS OF THE NUCLEUS OF GREAT SEPTEMBER COMET OF 1882 FROM MOTIONS OF ITS FRAGMENTS
  26. ^ (EN) POPULATIONS OF THE KREUTZ SUNGRAZER SYSTEM IN A SOHO DATABASE
  27. ^ (EN) ON ELUSIVE OBSERVATIONS AND A SLY COMPANION OF COMET WIRTANEN (C/1956 F1)
  28. ^ (EN) ON THE EXISTENCE OF A SUPER-KREUTZ SYSTEM OF SUNGRAZING COMETS
  29. ^ (EN) FRAGMENTATION AND HISTORY OF COMET PAIR C/1844 Y1 AND C/2019 Y4
  30. ^ (EN) SPECTACULAR POST-PERIHELION TAILS OF BRIGHT KREUTZ SUNGRAZERS
  31. ^ (EN) NASA Honor Awards 1985
  32. ^ (EN) DISSERTATIO CVM NVNCIO SIDEREO III, SERIES TERTIA, n. 4, Praga 6 agosto 2006

Altri progetti

Controllo di autoritàVIAF (EN) 38295522 · LCCN (EN) n83169791 · J9U (EN, HE) 987007389043405171
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