论文标题
IIN型超新星SN 2010JL灭绝的尘埃模型
Dust Models for the Extinction of Type IIn Supernova SN 2010jl
论文作者
论文摘要
SN 2010JL的异常灭绝曲线为研究核心循环超新星形成的尘埃的特性提供了绝佳的机会。通过使用一系列具有不同组合物和晶粒尺寸分布的灰尘模型，我们符合SN 2010JL的灭绝曲线，并发现具有指数截断的幂律尺寸分布的硅酸盐 - 石膏混合物灰尘模型可以很好地再现其异常的灭绝曲线。最佳拟合结果表明，从灰尘模型中得出的灭绝与所有时期观察到的值一致。但是，总对选择性的灭绝率$ r_v $约为2.8-3.1，其值明显小于Gall等人得出的$ R_V \ 6.4 $的值。最佳拟合模型表明，SN 2010JL周围的粉尘粒可能由小型天文学硅酸盐晶粒和微米大小的石墨晶粒组成。此外，通过将光学拟合到中红外光谱能量分布，我们发现SN 2010JL周围的尘埃质量随时间增加，峰值亮度后1300天左右最高$ 0.005 \，M _ {\ odot} $，这与先前的估计是一致的。
The unusual extinction curves of SN 2010jl provide an excellent opportunity to investigate the properties of dust formed by core-collapse supernovae. By using a series of dust models with different compositions and grain size distributions, we fit the extinction curves of SN 2010jl and find that a silicate-graphite mixture dust model characterized by exponentially cutoff power-law size distributions can well reproduce its unusual extinction curves. The best-fit results show that the extinctions derived from the dust models are consistent with the observed values at all epochs. However, the total-to-selective extinction ratio $R_V$ is about 2.8 - 3.1, which is significantly smaller than the value of $R_V \approx 6.4$ derived by Gall et al. The best-fit models indicate that the dust grains around SN 2010jl are possibly composed of small-size astronomical silicate grains and micron-size graphite grains. In addition, by fitting the optical to mid-infrared spectral energy distribution, we find that the dust mass around SN 2010jl increases with time, up to $0.005\,M_{\odot}$ around 1300 days after peak brightness, which is consistent with previous estimates.
