A Spitzer Space Telescope Study of SN 2003gd: Still No Direct Evidence that Core-Collapse Supernovae are Major Dust Factories
A Spitzer Space Telescope Study of SN 2003gd: Still No Direct Evidence that Core-Collapse Supernovae are Major Dust Factories
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斯皮策太空望远镜对SN 2003gd的研究：仍然没有直接证据表明核心塌陷超新星是主要的尘埃工厂
DOI：
10.1086/519733
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
Florida State University Stockholm University University C Austin
中科院分区：
文献类型：
--
作者：
W. Meikle;S. Mattila;A. Pastorello;C. Gerardy;R. Kotak;J. Sollerman;S. V. Dyk;D. Farrah;A. Filippenko;P. Lundqvist;M. Pozzo;J. I. C. London;Queen's University of Belfast;U. Copenhagen;Spitzer Science CenterCaltech Cornell University;U. California;Berkeley;Florida State University Stockholm University University C Austin
我们对第II-P型超新星(SN)2003gd的后期中红外观测进行了新的、详细的分析。在爆炸后约16个月，中红外通量与喷出物中新凝聚尘埃的4×10-5M☉的排放是一致的。在22个月时，在8和24μm处检测到接近SN位置的点状源的排放。到42个月时，24μm通量已经消退。考虑到光度和源大小，排除了SN2003gd的抛射是22个月时排放的主要来源的可能性。另一种可能的解释是来自先前存在的星际或星际尘埃的红外回波。我们的结论是，与苏格曼及其同事的说法相反，SN2003gd的中红外发射不支持喷出物中存在0.02M☉的新形成的尘埃。到目前为止，还没有直接证据表明核心坍塌的超新星是主要的尘埃工厂。
We present a new, detailed analysis of late-time mid-infrared observations of the Type II-P supernova (SN) 2003gd. At about 16 months after the explosion, the mid-IR flux is consistent with emission from 4 × 10-5 M☉ of newly condensed dust in the ejecta. At 22 months emission from pointlike sources close to the SN position was detected at 8 and 24 μm. By 42 months the 24 μm flux had faded. Considerations of luminosity and source size rule out the ejecta of SN 2003gd as the main origin of the emission at 22 months. A possible alternative explanation for the emission at this later epoch is an IR echo from preexisting circumstellar or interstellar dust. We conclude that, contrary to the claim of Sugerman and coworkers, the mid-IR emission from SN 2003gd does not support the presence of 0.02 M☉ of newly formed dust in the ejecta. There is, as yet, no direct evidence that core-collapse supernovae are major dust factories.
DOI：
10.1111/j.1365-2966.2006.11336.x
发表时间：
2006-11
影响因子：
4.8
作者：
B. Ercolano;M. Barlow;B. Sugerman
通讯作者：
B. Ercolano;M. Barlow;B. Sugerman