NEOWISE-R 在 Messier 101 中捕捉到了明亮的 SN 2023ixf
NEOWISE-R Caught the Luminous SN 2023ixf in Messier 101
AI总结：
本文利用 NEOWISE-R 紫外到中红外的多波段观测数据，分析了 Messier 101 中的 SN 2023ixf 超新星，揭示了其早期星周尘埃热辐射与晚期新尘埃形成及一氧化碳发射特征，是迄今中红外观测最详尽的 IIP 型超新星。
摘要：
重新启用的近地天体广域红外巡天探测器（NEOWISE-R）在爆发上升期偶然捕捉到了位于 Messier 101 中的 II 型超新星 SN 2023ixf，时间跨度从第 3.6 天到第 10.9 天，并在晚期的下降期（第 211 至 213 天以及第 370 至 372 天）进行了观测。我们尽可能将这些中红外（mid-IR）数据与从紫外（UV）到近红外的观测数据结合起来分析。在第 3.6 天，我们用温度约为 26,630 K 的热黑体拟合了光学发射，其显著的紫外超可能源于超新星激波与星周物质（CSM）的强烈相互作用。然而，在红外波段也存在明显的超出发射，我们用温度较低（约 1,620 K）、半径约 2.6 x 10^{15} cm 的黑体对其进行拟合，这与前身星星周壳层中的尘埃一致，该尘埃可能被 CSM 相互作用产生的紫外发射加热。在第 10.8 天，探测到的光与超新星抛射物主导的发射一致。在晚期，我们也观测到了明显的 NEOWISE-R 超出发射，这可能源于内抛射物或正向与反向激波之间接触不连续面中新形成的尘埃，或者来自超新星环境中更远的预存尘埃颗粒。此外，晚期 4.6 微米处的大量超出也可以用一氧化碳 1--0 振动带的显现来解释。SN 2023ixf 是爆炸后最初几天内中红外波段观测数据最丰富的 IIP 型超新星，也是有史以来观测到的最明亮的此类超新星之一。
英文摘要：
The reactivated Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE-R) serendipitously caught the Type II supernova SN 2023ixf in Messier 101 on the rise, starting day 3.6 through day 10.9, and on the late-time decline from days 211 through 213 and days 370 through 372. We have considered these mid-infrared (mid-IR) data together with observations from the ultraviolet (UV) through the near-IR, when possible. At day 3.6 we approximated the optical emission with a hot, ~26,630 K blackbody, with a notable UV excess likely from strong SN shock interaction with circumstellar matter (CSM). In the IR, however, a clear excess is also obvious, and we fit it with a cooler, ~1,620 K blackbody with radius of ~2.6 x 10^{15} cm, consistent with dust in the progenitor's circumstellar shell likely heated by the UV emission from the CSM interaction. On day 10.8, the light detected was consistent with SN ejecta-dominated emission. At late times we also observed a clear NEOWISE-R excess, which could arise either from newly formed dust in the inner ejecta or in the contact discontinuity between the forward and reverse shocks, or from more distant pre-existing dust grains in the SN environment. Furthermore, the large 4.6 micron excess at late times can also be explained by the emergence of the carbon monoxide 1--0 vibrational band. SN 2023ixf is the best-observed SN IIP in the mid-IR during the first several days after explosion and one of the most luminous such SNe ever seen.
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。
