[论文解读] The environmental dependence of mid-IR luminous dusty Supernovae

Lin Xiao, Zeyue Peng+11 more|arXiv (Cornell University)|Feb 27, 2026

Gamma-ray bursts and supernovae被引用 0

一句话总结

作者识别出42例使用 Spitzer 和 WISE 的中红外明亮尘埃核心坍塌超新星（SNe），并通过 IFU 主星数据分析其局部环境，显示尘埃丰富的 SNe 更偏好高 EW(Hα)、金属丰度较低的区域且具有更高的消光，并在 SN 类型间呈现进展，暗示多样化的前体系统。

ABSTRACT

Using the Spitzer and WISE images, we discovered 42 mid-IR luminous dusty supernovae with local integral-field spectroscopy data. The observed mid-IR emission indicates the presence of newly formed dust, or pre-existing dust heated by the radiation from the supernovae or circumstellar medium interactions. We carried out a systematic analysis of the supernova host environments and their dust properties, for understanding the dust-veiled exploding stars, and whether such an intense dust production process is associated with their local environments. We find that dusty supernovae prefer the locations with higher EW(Hα), lower metallicity, and heavier host extinctions compared to typical SN types, and they show the same increasing sequence in the values of EW(Hα) and oxygen abundance from hydrogen-rich, type IIn and hydrogen-poor dusty supernovae. These differences in environmental properties of different dusty SN types indicate the diversity of their progenitors. We also found that one marginal correlation is a negative correlation between the SN dust mass and star formation rate. This means that SNe would be more mid-IR luminous and more dust-rich at the region with lower star formation rate. However, the SN dust mass show no correlation with the metallicity and the host extinction, which were thought to be key factors affecting the mass-loss history of progenitors and the CSM environment of SNe. Therefore, the dust formation process in SNe might be insensitive to metallicity and the dust condition of their host environments.

研究动机与目标

• Investigate whether mid-IR luminous dusty SNe preferentially occur in distinct local environments compared to the broader CCSN population.
• Characterize the local ISM conditions (EW(Hα), metallicity, SFR, extinction) at SN sites for dusty SNe across subtypes.
• Assess how environmental properties correlate with SN dust properties and infer implications for dust production and progenitor systems.
• Disentangle whether SN dust is primarily newly formed or pre-existing by comparing inferred dust masses with shock-processing models.

提出的方法

• Compile a sample of 42 dusty SNe with mid-IR detections from Spitzer and WISE linked to nearby CCSNe with IFU host data from Galbany2018, Pessi2023, and Moriya2023.
• Perform mid-IR photometry using time-resolved unWISE coadds with image subtraction (SFFT) and aperture photometry; require at least a 3σ detection in any band.
• Fit the mid-IR SEDs with an optically thin dust model assuming a single-temperature graphite grain of a=0.1 μm to derive M_dust and T_dust (Equation 1).
• Compute a blackbody radius R_BB from the fitted dust emission (Equation 2) and compare with the forward-shock radius to assess whether dust is pre-existing or newly formed (relationship to shock velocity v_s).
• Estimate the shocked-dust mass at v_s up to 15,000 km/s (Equation 3) to distinguish dust origin (pre-existing vs. newly formed).
• Statistically compare environmental properties (EW(Hα), 12+log(O/H), log ΣSFR, E(B−V)) of dusty SNe with the broader IFU SN samples.

实验结果

研究问题

• RQ1 Dusty SNe reside in environments with systematically different EW(Hα)、金属丰度、SFR、或 extinction compared to typical CCSNe 吗？
• RQ2 在 SN 子类型（H-rich、H-poor、IIn）之间是否存在与尘埃 SNe 属性相关的单调环境趋势？
• RQ3 SN 尘埃质量与局部 SFR/金属丰度的关系对 SN 尘埃形成机制有何启示？
• RQ4 基于尘埃质量与冲击加工约束的比较，SN 尘埃是主要的既存还是新形成？

主要发现

• Dusty SNe 偏好居于 EW(Hα) 更高的环境中，这表明其现场的年轻恒星群体。
• 尘埃型 SNe 的宿主呈现从氢丰富到氢贫、再到 IIn 的 EW(Hα) 与氧丰度的进展，暗示前体的多样性。
• 尘埃 SNe 现场的星形成率强度通常低于某些典型 SN 类型，IIn 尘埃 SN 倾向于处于较低 SFR 区域。
• 通过中红外 SED 拟合得到的 SN 尘埃质量范围为 1e-5 到 1e-2 太阳质量，数据表明大多尘埃为既存尘埃，而非在爆发物喷发中新形成。
• 在 SN 尘埃质量与局部星形成率之间发现边际负相关，暗示尘埃在较低 SFR 区域的中红外 luminosity 可能更高。
• 尘埃质量与金属丰度或宿主的消光之间未呈现明确相关性，提示尘埃形成可能对这些宿主环境因素不敏感。