论文标题
$ y $和$ j $乐队的近红外弥漫性星际乐队的调查。 I.新确定的乐队
Survey of near-infrared diffuse interstellar bands in $Y$ and $J$ bands. I. Newly identified bands
论文作者
论文摘要
我们通过分析近红外（NIR）高分辨率（$ r = 20,000 $和28,000）光谱的31个红色早期型星星（$ 0.04 <e（b-v）<e（b-v）<e 4.58 $），并参考了一份，我们搜索了0.91 $ <λ<£1.33 $ $ m $ m区域中的差异星体带（DIB）。使用寒冷的光谱仪收集光谱，该光谱仪安装在2012--2016的日本Koyama天文天文台的1.3 M Araki望远镜上，以及2017----2018的La Silla天文台的3.58 m新技术望远镜上。我们检测到了54个DIB-这项研究新发现的25个 - 八名DIB候选者。使用此更新列表，研究了从光学到NIR的宽波长范围内的DIB分布。发现NIR DIB的FWHM值平均比光学二动物的FWHM值窄，这表明较长波长的DIB往往是由较大的分子引起的。假设较大的载体负责较长波长的DIB，并且具有较大的振荡器强度，我们发现DIB载体的总柱密度往往随着DIB波长的增加而降低。还讨论了NIR DIB的候选分子和离子。
We searched for diffuse interstellar bands (DIBs) in the 0.91$<λ<$1.33 $μ$m region by analyzing the near-infrared (NIR) high-resolution ($R=20,000$ and 28,000) spectra of 31 reddened early-type stars ($0.04<E(B-V)<4.58$) and an unreddened reference star. The spectra were collected using the WINERED spectrograph, which was mounted on the 1.3 m Araki telescope at Koyama Astronomical Observatory, Japan, in 2012--2016, and on the 3.58 m New Technology Telescope at La Silla Observatory, Chile, in 2017--2018. We detected 54 DIBs -- 25 of which are newly detected by this study -- eight DIB candidates. Using this updated list, the DIB distributions over a wide wavelength range from optical to NIR are investigated. The FWHM values of the NIR DIBs are found to be narrower than those of the optical DIBs on average, which suggests that the DIBs at longer wavelengths tend to be caused by larger molecules. Assuming that the larger carriers are responsible for the DIBs at longer wavelengths and have the larger oscillator strengths, we found that the total column densities of the DIB carriers tend to decrease with increasing DIB wavelength. The candidate molecules and ions for the NIR DIBs are also discussed.
