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arXiv 1303.3546astro-ph.HE
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G306 .3-0.9:新发现的年轻星系超新星遗迹

G306.3-0.9: A newly discovered young galactic supernova remnant

Mark Reynolds, Shyeh Loi, Tara Murphy, Jon Miller, Dipankar Maitra, Kayhan Gultekin, Neil Gehrels, Jamie Kennea, Michael Siegel, Jonathan Gelbord, Paul Kuin, Va… 展开作者

Mark Reynolds, Shyeh Loi, Tara Murphy, Jon Miller, Dipankar Maitra, Kayhan Gultekin, Neil Gehrels, Jamie Kennea, Michael Siegel, Jonathan Gelbord, Paul Kuin, Vanessa Moss, Sarah Reeves, William Robbins, Bryan Gaensler, Rubens Reis, Robert Petre

摘要:

我们提出了新的银河系超新星遗迹(SNR)G306.3-0.9的X射线和无线电观测,最近发现的雨燕。钱德拉成像揭示了一个复杂的形态,由一个明亮的冲击为主。X射线光谱与Sedov阶段的年轻SNR大致一致,这意味着距离8 kpc的年龄为2500年,可能将其确定为银河系20个最年轻的SNR之一。澳大利亚望远镜紧凑阵列(ATCA)的成像显示了一个与X射线发射相关的无线电发射的突出脊。我们发现在1 GHz的流量密度为~ 160 mJy,这是迄今为止银河SNR记录的最低无线电流量。在24微米处也检测到了残留物,表明存在辐射过的温暖尘埃。数据显示没有令人信服的证据表明存在致密的恒星残骸。

英文摘要:

We present X-ray and radio observations of the new Galactic supernova remnant (SNR) G306.3-0.9, recently discovered by Swift. Chandra imaging reveals a complex morphology, dominated by a bright shock. The X-ray spectrum is broadly consistent with a young SNR in the Sedov phase, implying an age of 2500 yr for a distance of 8 kpc, plausibly identifying this as one of the 20 youngest Galactic SNRs. Australia Telescope Compact Array (ATCA) imaging reveals a prominent ridge of radio emission that correlates with the X-ray emission. We find a flux density of ~ 160 mJy at 1 GHz, which is the lowest radio flux recorded for a Galactic SNR to date. The remnant is also detected at 24microns, indicating the presence of irradiated warm dust. The data reveal no compelling evidence for the presence of a compact stellar remnant.

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