检查GRB 980703中的粉尘销毁证据
Examining the evidence for dust destruction in GRB 980703
摘要：
伽马射线暴对环境的影响是一个重要而突出的问题。特别是尘埃的破坏长期以来一直被预测，但很难获得观测证据。我们研究的证据，尘埃破坏的GRB 980703，其中各种不一致的测量主机星系灭绝已使用GRB余辉发射。我们构建了一个光谱能量分布从近红外到X射线测量消光在早期，并与以前的研究结果进行比较。我们还构建了近红外/光学SED在中间时期，以检查先前报道的减少消光。对于伽玛射线暴的宿主星系来说，灭绝是非常高的。最早的灭绝测量可能低于先前的估计，并与大多数后来的测量结果一致。在一系列的SED中，我们没有发现任何可变灭绝的证据。因此，我们得出结论，在这种情况下，没有明确的证据表明粉尘破坏。
英文摘要：
The effects that gamma-ray bursts have on their environments is an important and outstanding issue. Dust destruction in particular has long been predicted while observational evidence is difficult to obtain. We examine the evidence for dust destruction by GRB 980703, in which various inconsistent measurements of the host galaxy extinction have been made using the GRB afterglow emission. We construct a spectral energy distribution from nIR to X-ray to measure the extinction at early times and compare this with previous findings. We also construct nIR/optical SEDs at intermediate epochs to examine a previously reported decrease in extinction. The extinction is very high for a GRB host galaxy. The earliest extinction measurement is likely to be lower than previously estimated, and consistent with most later measurements. In a series of SEDs we do not find any evidence of variable extinction. We therefore conclude that there is no clear evidence of dust destruction in this case.
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