arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1901.01599astro-ph.IMhep-ex
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LSST定位我们星系中由中微子超新星警报触发的核心坍缩超新星的机会目标提案

LSST Target of Opportunity proposal for locating a core collapse supernova in our galaxy triggered by a neutrino supernova alert

Christopher W. Walter, Daniel M. Scolnic, Anže Slosar

摘要:

每一个世纪,核心坍缩超新星(CCSN)会在我们的星系中发生几次。当这样的星系CCSNe发生时,超过99%的引力结合能以中微子的形式释放。在几十秒的时间内,一个强大的中微子流从坍缩的恒星中发射出来。当爆炸的冲击波最终到达恒星表面时,逃离膨胀的恒星包层的光子离开恒星,最终到达地球,成为可见的增亮。至关重要的是,虽然中微子信号是迅速的,但冲击波爆发的时间可能是几分钟到几个小时之后。这意味着中微子信号将作为警报,警告光学天文学界爆炸的光即将到来。快速确定超新星在天空中的位置并将其传播到所有可用的地面和空间仪器,对于尽可能多地了解该事件至关重要。一些中微子实验可以报告这些星系CCSNe的指向信息。特别是,Super-Kamiokande实验可以指向我们星系中心附近的CCSNe几度。位于距离地球10千秒差距的CCSN预计将导致3度量级的指向分辨率。LSST的视野(FOV)与这个初始搜索框非常匹配。LSST的深度也是唯一适合识别CCSNe的,即使它们失败或被银道面的尘埃所掩盖。这是一项建议,即在收到这种警报后,优先使用LSST进行一整天的观测,以连续监测预先确定的天空区域,并通过使用差分成像,确定和宣布超新星的位置。

英文摘要:

A few times a century, a core collapse supernova (CCSN) occurs in our galaxy. When such galactic CCSNe happen, over 99\% of its gravitational binding energy is released in the form of neutrinos. Over a period of tens of seconds, a powerful neutrino flux is emitted from the collapsing star. When the exploding shock wave finally reaches the surface of the star, optical photons escaping the expanding stellar envelope leave the star and eventually arrive at Earth as a visible brightening. Crucially, although the neutrino signal is prompt, the time to the shock wave breakout can be minutes to many hours later. This means that the neutrino signal will serve as an alert, warning the optical astronomy community the light from the explosion is coming. Quickly identifying the location of the supernova on the sky and disseminating it to the all available ground and spaced-based instruments will be critical to learn as much as possible about the event. Some neutrino experiments can report pointing information for these galactic CCSNe. In particular, the Super-Kamiokande experiment can point to a few degrees for CCSNe near the center of our galaxy. A CCSN located 10 kpc from Earth is expected to result in a pointing resolution on the order of 3 degrees. LSST's field of view (FOV) is well matched to this initial search box. LSSTs depth is also uniquely suited for identifying CCSNe even if they fail or are obscured by the dust of the galactic plane. This is a proposal to, upon receipt of such an alert, prioritize the use of LSST for a full day of observing to continuously monitor a pre-identified region of sky and, by using difference imaging, identify and announce the location of the supernova.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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