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arXiv 1102.3761astro-ph.SR
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新星Her 1960的矮新星爆发(= V446 Her)

The Dwarf Nova Outbursts of Nova Her 1960 (=V446 Her)

R. K. Honeycutt, J. W. Robertson, S. Kafka

摘要:

V446 Her是一颗古老新星的最好例子,它在新星后的状态下发展出矮新星爆发。我们报告的V446 Her的长期光变曲线的观测性能,使用测光超过19年。爆发的年平均值显示出约0.013等/年的下降,与其他没有矮新星爆发的后新星的下降一致。证实了以前的建议双峰分布的振幅和宽度的爆发。爆发发生的平均间隔为18天,但间隔的范围很大(13-30天)。根据矮新星爆发的模拟,预测V446 Her的爆发间隔将随着红矮星伴星的M点随新星缓慢下降而增加;然而,间隔中的大的内在散射掩盖了这种效应的任何证据。我们确实发现了爆发模式的系统性变化,其中更明亮,更广泛的爆发类型在2003年底后消失,这种现象被认为是由于新星之后的M点下降。

英文摘要:

V446 Her is the best example of an old nova which has developed dwarf nova eruptions in the post-nova state. We report on observed properties of the long-term light curve of V446 Her, using photometry over 19 years. Yearly averages of the outburst magnitudes shows a decline of ~0.013 mag/yr, consistent with the decline of other post-novae that do not have dwarf nova outbursts. Previous suggestions of bimodal distributions of the amplitudes and widths of the outbursts are confirmed. The outbursts occur at a mean spacing of 18 days but the range of spacings is large (13-30 days). From simulations of dwarf nova outbursts it has been predicted that the outburst spacing in V446 Her will increase as M-dot from the red dwarf companion slowly falls following the nova; however the large intrinsic scatter in the spacings serves to hide any evidence of this effect. We do find a systematic change in the outburst pattern in which the brighter, wider type of outbursts disappeared after late 2003, and this phenomenon is suggested to be due to falling M-dot following the nova.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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