DETERMINING TYPE Ia SUPERNOVA HOST GALAXY EXTINCTION PROBABILITIES AND A STATISTICAL APPROACH TO ESTIMATING THE ABSORPTION-TO-REDDENING RATIO RV
DETERMINING TYPE Ia SUPERNOVA HOST GALAXY EXTINCTION PROBABILITIES AND A STATISTICAL APPROACH TO ESTIMATING THE ABSORPTION-TO-REDDENING RATIO RV
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DOI：
10.3847/0004-637x/819/2/152
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发表时间：
2016-01
期刊：
影响因子：
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通讯作者：
A. Cikota;S. Deustua;F. Marleau
中科院分区：
文献类型：
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作者：
A. Cikota;S. Deustua;F. Marleau
我们研究了Ia型超新星（SNe Ia）的消光值的极限，以统计确定最可能的颜色过量E(B - V)，与星系中心距离，并使用这些统计数据来确定宿主星系中尘埃的吸收-变红比RV。我们从“邻近星系关键洞察：赫歇尔远红外巡天”（KINGFISH）中确定了59个星系的基于像素的尘埃质量表面密度图。我们利用SN Ia光谱模板建立了RV = 3.1时颜色过剩E（B - V）的蒙特卡罗模拟，并研究了颜色过剩概率E（B - V）与投影径向星系中心距离的关系。此外，我们还利用观测到的SN 1989B、SN 2002bo和SN 2006X的光谱来验证我们的模型，这三个星系都出现在KINGFISH星系中。最后，我们确定了Sa-Sap、sbb - sbp、Sbc-Scp、sd - sdm、S0和不规则星系类的最可能变红与R/R25的关系。我们发现最大的预期变红概率是在sbb - sb和Sbc-Sc星系中，而S0和不规则星系则非常缺乏尘埃。我们提出了一种利用颜色超额概率函数确定吸收-变红比RV的新方法，并得到了在Sbc-Scp星系中观测到的21个SNe Ia的RV = 2.71±1.58，以及在Sbc-Scp星系中观测到的34个SNe Ia的RV = 1.70±0.38。
We investigate limits on the extinction values of Type Ia supernovae (SNe Ia) to statistically determine the most probable color excess, E(B – V), with galactocentric distance, and use these statistics to determine the absorption-to-reddening ratio, RV, for dust in the host galaxies. We determined pixel-based dust mass surface density maps for 59 galaxies from the Key Insight on Nearby Galaxies: a Far-infrared Survey with Herschel (KINGFISH). We use SN Ia spectral templates to develop a Monte Carlo simulation of color excess E(B – V) with RV = 3.1 and investigate the color excess probabilities E(B – V) with projected radial galaxy center distance. Additionally, we tested our model using observed spectra of SN 1989B, SN 2002bo, and SN 2006X, which occurred in three KINGFISH galaxies. Finally, we determined the most probable reddening for Sa–Sap, Sab–Sbp, Sbc–Scp, Scd–Sdm, S0, and irregular galaxy classes as a function of R/R25. We find that the largest expected reddening probabilities are in Sab–Sb and Sbc–Sc galaxies, while S0 and irregular galaxies are very dust poor. We present a new approach for determining the absorption-to-reddening ratio RV using color excess probability functions and find values of RV = 2.71 ± 1.58 for 21 SNe Ia observed in Sab–Sbp galaxies, and RV = 1.70 ± 0.38, for 34 SNe Ia observed in Sbc–Scp galaxies.