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 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:
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RA (2000) DE Designation(s)
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01 05 05.4 +54 00 40 V723 Cas = NOVA Cas 1995
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 67 333 Wavelengths, equivalent widths and identifications
of all emission and absorption lines of Nova (V723)
Cas 1995 observed on 1995 Sept. 12 and Dec. 4
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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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)
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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.
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Acknowledgements: Takashi Iijima
(End) Patricia Bauer [CDS] 31-Jul-1998