标题： 猎户座α星爆发第二个峰值的新解释：围绕一个非常大质量白矮星的倾斜吸积盘 显示英文标题

标题： A New Interpretation for the Second Peak of T Coronae Borealis Outbursts: A Tilting Disk around a Very Massive White Dwarf

摘要： 基于热核失控（TNR）模型，提出了对天龙座冠一（T CrB）爆发第二个峰值的新解释。 该系统由一个非常大质量的白矮星（WD）和一个倾斜的吸积盘以及充满洛希瓣的红巨星组成。 T CrB爆发的光变曲线的第一个峰值可以通过接近钱德拉塞卡质量（$M_{\rm WD} \gtrsim 1.35 ~M_\odot$）的WD上的TNR模型很好地再现，而第二个峰值则是由照射的M型巨星和照射的倾斜盘共同再现的。 得出的拟合参数是WD质量$M_{\rm WD} \sim 1.35 ~M_\odot$，M型伴星质量$M_{\rm RG} \sim 0.7 M_\odot$（$0.6-1.0 M_\odot$是可接受的），轨道倾角$i \sim 70 \arcdeg$，以及盘的倾斜角$i_{\rm prec} \sim 35 \arcdeg$。 这些参数与最近得出的T CrB双星参数一致。 显示英文摘要

摘要： A new interpretation for the second peak of T Coronae Borealis (T CrB) outbursts is proposed based on a thermonuclear runaway (TNR) model. The system consists of a very massive white dwarf (WD) with a tilting accretion disk and a lobe-filling red-giant. The first peak of the visual light curve of T CrB outbursts is well reproduced by the TNR model on a WD close to the Chandrasekhar mass ($M_{\rm WD} \gtrsim 1.35 ~M_\odot$), while the second peak is reproduced by the combination of the irradiated M-giant and the irradiated tilting disk. The derived fitting parameters are the WD mass $M_{\rm WD} \sim 1.35 ~M_\odot$, the M-giant companion mass $M_{\rm RG} \sim 0.7 M_\odot$ ($0.6-1.0 M_\odot$ is acceptable), the inclination angle of the orbit $i \sim 70 \arcdeg$, and the tilting angle of the disk $i_{\rm prec} \sim 35 \arcdeg$. These parameters are consistent with the recently derived binary parameters of T CrB.