A detailed analysis of the IUE archival high resolution spectra of the classical nova V1974 Cyg 1992 was presented. It was found that the main UV resonance lines showed P Cygni profiles in the first days, which changed into symmetric pure emission lines, and then slowly became fainter and narrower. It was also found that the lines of higher ionization species reached their peak luminosity later than those of low ionization which was explained by a fast wind which was optically thick in the early days when the pseudophotosphere was located inside it. The velocity of both the shells was also found to increased with time.
A study of the expanding envelope of Nova V1974 Cyg 1992 based on IUE high resolution spectroscopy / A., Cassatella; H. J. G. L. M., Lamers; Rossi, Corinne; A., Altamore; R., Gonzalez Riestra. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - 420:2(2004), pp. 571-588. [10.1051/0004-6361:20034102]
A study of the expanding envelope of Nova V1974 Cyg 1992 based on IUE high resolution spectroscopy
ROSSI, Corinne;
2004
Abstract
A detailed analysis of the IUE archival high resolution spectra of the classical nova V1974 Cyg 1992 was presented. It was found that the main UV resonance lines showed P Cygni profiles in the first days, which changed into symmetric pure emission lines, and then slowly became fainter and narrower. It was also found that the lines of higher ionization species reached their peak luminosity later than those of low ionization which was explained by a fast wind which was optically thick in the early days when the pseudophotosphere was located inside it. The velocity of both the shells was also found to increased with time.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
