论文标题
银河超新星残留物的灰尘的系统研究I.距离和灭绝
A Systematic Study of the dust of Galactic Supernova Remnants I. The Distance and the Extinction
论文作者
论文摘要
通过将恒星在SNR的视线中的光度法，光谱和星体信息相结合，研究了32个银河超新星残留物（SNR）的距离和灭绝。出色的大气参数来自SDSS $ - $ DR14 $/$ APOGEE和LAMOST $ -DR5 $/$ LEGUE SPENESTROSCOPIC调查。从光学到红外的多波段光度法是从{\ it gaia}，apass，pan-starrs1，2mass和{\ it Wise}的调查中收集的。使用单个恒星的校准{\ it gaia}距离，从产生的灭绝和与分子云的关联中，至32个SNR中的15个距离。距离的上限用于3个SNR。颜色过剩率$ e（g _ {\ rm p1}-λ） / e（g _ {\ rm p1} -r _ {\ rm p1}）$ 32 snrs的$，并且它们与波段的变化拟合了一个简单的灰尘模型。推断的灰尘晶粒尺寸分布分叉：虽然石墨颗粒的尺寸与平均ISM灰尘相当，但硅酸盐晶粒通常更大。一路上，从光学到近红外的平均灭绝法源自130万星样本，发现与$ r _ {\ rm v} = 3.15 $的CCM89法律一致。
By combining the photometric, spectroscopic, and astrometric information of the stars in the sightline of SNRs, the distances to and the extinctions of 32 Galactic supernova remnants (SNRs) are investigated. The stellar atmospheric parameters are from the SDSS$-$DR14$/$APOGEE and LAMOST$-$DR5$/$LEGUE spectroscopic surveys. The multi-band photometry, from optical to infrared, are collected from the {\it Gaia}, APASS, Pan--STARRS1, 2MASS, and {\it WISE} surveys. With the calibrated {\it Gaia} distances of individual stars, the distances to 15 of 32 SNRs are well determined from their produced extinction and association with molecular clouds. The upper limits of distance are derived for 3 SNRs. The color excess ratios $E(g_{\rm P1}-λ) / E(g_{\rm P1}-r_{\rm P1})$ of 32 SNRs are calculated, and their variation with wavebands is fitted by a simple dust model. The inferred dust grain size distribution bifurcates: while the graphite grains have comparable size to the average ISM dust, the silicate grains are generally larger. Along the way, the average extinction law from optical to near-infrared of the Milky Way is derived from the 1.3 million star sample and found to agree with the CCM89 law with $R_{\rm V}=3.15$.
