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arXiv 0806.4253astro-ph
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经典新星的一个普遍衰减规律。III。GQ小鼠1983年

A Universal Decline Law of Classical Novae. III. GQ Mus 1983

Izumi Hachisu, Mariko Kato, Angelo Cassatella

摘要:

我们提出了一个统一的模型,红外(IR),光学,紫外(UV),和X射线光变曲线的1983年爆发的GQ苍蝇(新苍蝇1983年),并估计其白矮星(WD)的质量。基于新星爆发的光学厚风模型,我们模拟了自由-自由辐射的光学和红外光变曲线,以及黑体辐射的UV 1455 λ和超软X射线光变曲线。同时再现IR、光学、UV 1455 λ和超软X射线观测结果的最佳拟合模型是0.7 \pm 0.05 M_ \sun WD,假设包层的化学组成为X=0.35-0.55,X_{CNO} =0.2-0.35,Z = 0.02(按质量计)。由风引起的质量损失估计为Δ M_{wind} \sim 2 \times 10^{-5} M_ \sun。我们提供了一个新的测定红化,E(B-V)= 0.55 \pm 0.05,距离,\sim 5 kpc。最后,我们讨论了发生在JD 2,445,499(爆发后151天)的强紫外闪光。

英文摘要:

We present a unified model of infrared (IR), optical, ultraviolet (UV), and X-ray light curves for the 1983 outburst of GQ Muscae (Nova Muscae 1983) and estimate its white dwarf (WD) mass. Based on an optically thick wind model of nova outbursts, we model the optical and IR light curves with free-free emission, and the UV 1455 Åand supersoft X-ray light curves with blackbody emission. The best fit model that reproduces simultaneously the IR, optical, UV 1455 Å, and supersoft X-ray observations is a 0.7 \pm 0.05 M_\sun WD for an assumed chemical composition of the envelope, X=0.35-0.55, X_{CNO} =0.2-0.35, and Z = 0.02, by mass weight. The mass lost by the wind is estimated to be ΔM_{wind} \sim 2 \times 10^{-5} M_\sun. We provide a new determination of the reddening, E(B-V) = 0.55 \pm 0.05, and of the distance, \sim 5 kpc. Finally, we discuss the strong UV flash that took place on JD 2,445,499 (151 days after the outburst).

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