Ultraviolet spectroscopy of symbiotic nova V1016 Cyg with IUE and HST

被引：3
|
作者：
Sanad, M. R. [1 ]
机构：
[1] Natl Res Inst Astron & Geophys, Dept Astron, Cairo, Egypt
来源：
NEW ASTRONOMY | 2017年 / 52卷
关键词：
Symbiotic novae; Cataclysmic variables; Stars Individual (V1016 Cyg); Ultraviolet stars; White dwarfs; MHALPHA; 328-116; INES SYSTEM; HM-SAGITTAE; STARS; EMISSION; BINARY; SPECTROPHOTOMETRY; PROTOPLANETARY; V1016-CYGNI; PHOTOMETRY;
D O I：
10.1016/j.newast.2016.10.002
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present International Ultraviolet Explorer (IUE) & Hubble Space Telescope Space Telescope Imaging Spectrograph (HST STIS) observations of the symbiotic nova V1016 Cyg through the period 1978 - 2000. Four spectra at different times revealing the changes in line fluxes are presented. The outflow velocity of the emitting region was calculated to be 900-2000 km s(-1) (FWHM). The reddening of V1016 Cyg was determined from 2200 A absorption feature to be E (B -V) = 0.36 +/- 0.02. We calculated the fluxes of CIV 1550 angstrom & CIII] 1909 angstrom emission lines produced in a stellar wind from the hot white dwarf. We determined the average wind mass loss rate to be similar to 2.3 x 10(-6) M-circle dot, the average temperature of the emitting region to be similar to 1.3 x 10(5)K, and an average ultraviolet luminosity to be similar to 2 x 10(35) erg s(-1). The results show that there are modulations of line fluxes with time. We attributed these spectral modulations to the changes of density and temperature in the emitting region as a result of the variable stellar wind. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：14 / 19
页数：6
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