论文标题
BC Cassiopeiae：在爆发后Novae中首次检测IW和型现象
BC Cassiopeiae: First Detection of IW And-Type Phenomenon Among Post-Eruption Novae
论文作者
论文摘要
IW和型矮人Novae最近被公认的一组灾难性变量，这些变量的特征是从停滞相位的亮度序列，经常经过阻尼振荡，然后经常进行深度倾斜。我们发现，1929年爆发的所谓古典新星CAS在2018年经历了IW和型矮人Nova的状态，爆发后89年。这一发现表明，Nova喷发后的高质量转移率与IW和型现象有关。从NOVA的下降速率推断出的白矮人的质量大大高于灾难性变量中白矮人的平均质量，而大量的白矮星可能是IW和型现象的表现。
IW And-type dwarf novae are recently recognized group of cataclysmic variables which are characterized by a sequence of brightening from a standstill-like phase with damping oscillations often followed by a deep dip. We found that the supposed classical nova BC Cas which erupted in 1929 experienced a state of an IW And-type dwarf nova in 2018, 89 yr after the eruption. This finding suggests that high mass-transfer rate following the nova eruption is associated with the IW And-type phenomenon. The mass of the white dwarf inferred from the decline rate of the nova is considerably higher than the average mass of the white dwarfs in cataclysmic variables and the massive white dwarfs may be responsible for the manifestation of the IW And-type phenomenon.
