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http://hdl.handle.net/20.500.12386/32663
Titolo: | Spectroscopic Observations of Nova V443 Scuti 1989 | Autori: | Rosino, L. BENETTI, Stefano Iijima, T. Rafanelli, P. DELLA VALLE, Massimo |
Data pubblicazione: | 1991 | Rivista: | THE ASTRONOMICAL JOURNAL | Numero: | 101 | Fascicolo: | 5 | Da pagina:: | 1807 | Abstract: | Nova V443 Scuti 1989 reached its maximum, of visual magnitude about 7.5, very likely on September 13-14, 1989, displaying in its early decline brightness fluctuations of relatively large amplitude with a periodicity of about 17 days. In October the spectrum was characterized by the presence of the Balmer emission lines and by those of Fe II, Na I, Ti II, O I, N II accompanied by two systems of displaced P Cyg absorptions, having an average velocity of about -710 and -1460 km/s. The transition phase took place in November, with the appearance of forbidden N II 5755 and O II 7319 -30 and with the O I 6300 - 6364 flash. In March 1990, the nova was found in the nebular phase with wide emission lines of H, He I, He II, and collisionally excited lines of forbidden N II, O II, O III, and Ne III. From April to July, the degree of ionization having further progressed, forbidden lines of Fe VI, Fe VII, A III, A IV, A V, Ca V, and possibly also of Fe X, emerged. | URI: | http://hdl.handle.net/20.500.12386/32663 | URL: | https://ui.adsabs.harvard.edu/abs/1991AJ....101.1807R/abstract https://api.elsevier.com/content/abstract/scopus_id/12044259067 |
ISSN: | 0004-6256 | DOI: | 10.1086/115808 | Bibcode ADS: | 1991AJ....101.1807R | Fulltext: | open |
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