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首页> 外文期刊>The Astrophysical journal >A DEEP SEARCH WITH THE HUBBLE SPACE TELESCOPE FOR LATE-TIME SUPERNOVA SIGNATURES IN THE HOSTS OF XRF 011030 AND XRF 0204271
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A DEEP SEARCH WITH THE HUBBLE SPACE TELESCOPE FOR LATE-TIME SUPERNOVA SIGNATURES IN THE HOSTS OF XRF 011030 AND XRF 0204271

机译：XRF 011030和XRF 0204271主机中具有时空超望远镜特征的深空望远镜的深层搜索

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摘要

X-ray flashes (XRFs) are, like gamma-ray bursts (GRBs), thought to signal the collapse of massive stars in distant galaxies. Many models posit that the isotropic equivalent energies of XRFs are lower than those for GRBs, such that they are visible from a reduced range of distances when compared with GRBs. Here we present the results of two-epoch Hubble Space Telescope imaging of two XRFs. These images, taken approximately 45 and 200 days postburst, reveal no evidence of an associated supernova in either case. Supernovae such as SN 1998bw would have been visible out to z ～ 1.5 in each case, while fainter supernovae such as SN 2002ap would have been visible to z ～ 1. If the XRFs lie at such large distances, their energies would not fit the observed correlation between the GRB peak energy and isotropic energy release (E_p ∝ E_(iso)~(1/2) ), in which soft bursts are less energetic. We conclude that, should these XRFs reside at low redshifts (z < 0.6), either their line of sight is heavily extinguished, they are associated with extremely faint supernovae, or, unlike GRBs, these XRFs do not have temporally coincident supernovae.
机译：X射线闪光（XRF）就像伽马射线爆发（GRB）一样，被认为标志着遥远星系中大质量恒星的坍塌。许多模型假定XRF的各向同性等效能量低于GRB的各向同性等效能量，因此与GRB相比，它们在缩小的距离范围内可见。在这里，我们介绍了两个XRF的两时间哈勃太空望远镜成像的结果。这些图像是在爆炸后大约45天和200天拍摄的，在任何情况下都没有发现相关超新星的迹象。在每种情况下，SN 1998bw等超新星在z〜1.5处都可见，而SN 2002ap等微弱的超新星在z〜1处可见。如果XRF的距离如此之大，它们的能量将不适合观测到的GRB峰值能量与各向同性能量释放之间的相关性（E_p ∝ E_（iso）〜（1/2）），其中软脉冲的能量较低。我们得出的结论是，如果这些XRF处于低红移状态（z <0.6），或者它们的视线被严重熄灭，它们与极微弱的超新星有关，或者与GRB不同，这些XRF不会具有时间上一致的超新星。

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