开普勒超新星遗迹尘埃辐射的前景贡献
Accounting for the Foreground Contribution to the Dust Emission towards Kepler's Supernova Remnant
摘要：
超新星是否对整个尘埃预算有重大贡献是一个有争议的话题。对冷尘埃敏感的亚毫米（submm）观测显示，在年轻的残余仙后座A（Cas A）和开普勒中有450和850微米的过量。来自Cas A的一些亚毫米级辐射已被证明受到视线上不相关物质的污染。本文利用原子和分子气体的亚毫米连续光谱成像和光谱观测，通过HI、~（12）CO（J=2-1）和~（13）CO（J=2-1），探讨了物质向开普勒的辐射。我们检测到微弱的CO排放（峰值TA* = 0.2- 1 K，1-2km/s fwhm）从弥漫的，光学薄的气体在一些submm团块的位置。前景分子云和原子云对亚毫米辐射的贡献可以忽略不计。修正后的开普勒残骸尘埃质量为0.1- 1.2太阳质量，大约是摩根等人（2003）原始研究中引用值的一半，但仍然足以解释高红移尘埃的起源。
英文摘要：
Whether or not supernovae contribute significantly to the overall dust budget is a controversial subject. Submillimetre (submm) observations, sensitive to cold dust, have shown an excess at 450 and 850 microns in young remnants Cassiopeia A (Cas A) and Kepler. Some of the submm emission from Cas A has been shown to be contaminated by unrelated material along the line of sight. In this paper we explore the emission from material towards Kepler using submm continuum imaging and spectroscopic observations of atomic and molecular gas, via HI, 12CO (J=2-1) and 13CO (J=2-1). We detect weak CO emission (peak TA* = 0.2-1K, 1-2km/s fwhm) from diffuse, optically thin gas at the locations of some of the submm clumps. The contribution to the submm emission from foreground molecular and atomic clouds is negligible. The revised dust mass for Kepler's remnant is 0.1--1.2 solar masses, about half of the quoted values in the original study by Morgan et al. (2003), but still sufficient to explain the origin of dust at high redshifts.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
