A spectroscopic study of the envelope of the recurrent Nova CI Aquilae

被引：0
|
作者：
M. A. Burlak
V. F. Esipov
机构：
[1] Sternberg Astronomical Institute,
来源：
Astronomy Letters | 2001年 / 27卷
关键词：
recurrent novae; spectroscopic observations; envelopes; chemical composition;
D O I：
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学科分类号：
摘要：
Spectroscopic observations of the recurrent Nova CI Aql in the wavelength range 4000–11000 Å are presented. Its evolution is traced from maximum light to the disappearance of nebular lines. 〈EB-V〉 = 0.91 ± 0.11, as inferred from the Balmer decrement. The mean expansion velocity of the envelope measured near maximum light is 2800 km s−1. The helium abundance in the Nova envelope has been found to be enhanced, ‹He/H›=0.22. CI Aql is similar in spectral evolution, in change of the envelope expansion velocity, and in helium abundance to other recurrent novae.
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页码：574 / 580
页数：6
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