Access to Astronomical Catalogues

← Click to display the menu
J/A+A/338/1006      V723 Cas equivalent widths (Iijima+ 1998)

Spectral evolution of Nova (V723) Cassiopeiae 1995: pre-maximum stage. Iijima T., Rosino L., Della Valle M. <Astron. Astrophys. 338, 1006 (1998)> =1998A&A...338.1006I (SIMBAD/NED BibCode)
ADC_Keywords: Novae ; Equivalent widths Keywords: stars: individual: V723 Cas - stars: novae, cataclysmic variables Abstract: The monitoring of spectral evolution of the very slow nova V723 Cas started at the Asiago Astrophysical Observatory just on the announcement of discovery. In this paper the spectral evolution during the long pre-maximum stage, which lasted from August to December 1995, is reported. Emission lines of H I and Fe II were prominent in the early stage. Most of the lines were accompanied by P Cygni type absorption components. The emission lines gradually weakened with time and the absorption components developed. The mean of the blue-shifts of the absorption components with respect to the emissions was about -126km/s in September and -96km/s in December 1995. Some lines of Fe I, Fe II, Y II, Sc II, Ba II, etc. appeared in the later stage. All emission lines, except for Hα, once nearly disappeared in November when the nova slightly brightened to V≃8.6. Some emission lines appeared again several days before the beginning of the final rise to maximum luminosity, then a pure absorption spectrum of F type supergiant was seen on the maximum of V≃7.1 at the middle of December. The absorption components of Si II lines at 634.7 and 637.1nm showed fairly different profiles from those of the other metallic lines, which suggests a complicated gas motion in the atmosphere. The distance and the absolute magnitude at maximum are estimated to be 2.95±0.7kpc and MV(max)=-6.1±0.5, respectively. The mass of the white dwarf in this system may be about 0.58±0.07M. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 01 05 05.4 +54 00 40 V723 Cas = NOVA Cas 1995 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table5.dat 72 333 Wavelengths, equivalent widths and identifications of all emission and absorption lines of Nova (V723) Cas 1995 observed on 1995 Sept. 12 and Dec. 4
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 6 F6.1 0.1nm lambda1 ? Measured wavelength on 12/09/95 8- 13 F6.2 0.1nm EW1 ? Equivalent width (12/09/95) 14 A1 --- u_EW1 Uncertainty flag on EW1 17- 22 F6.1 0.1nm lambda2 ? Measured wavelength on 04/12/95 24- 29 F6.2 0.1nm EW2 ? Equivalent width (04/12/95) 30 A1 --- u_EW2 Uncertainty flag on EW2 33- 72 A40 --- Ident Identification (1)
Note (1): Identifications of the lines, where the name of ions, multiplet numbers, and their laboratory wavelengths are presented, but the first two digits of the wavelengths are omitted.
Acknowledgements: Takashi Iijima
(End) Patricia Bauer [CDS] 31-Jul-1998
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact