PGIR 20 eid（SN2020qmp）：帕洛玛·加蒂尼-IR巡天发现的IIP型15.6 Mpc超新星
PGIR 20eid (SN2020qmp): A Type IIP Supernova at 15.6 Mpc discovered by the Palomar Gattini-IR survey
摘要：
我们提出了一个详细的分析SN 2020 qmp，一个附近的IIP型核心坍缩超新星（CCSN），发现的Palomar Gattini-IR（PGIR）的调查在星系UGC 07125。我们说明了对这一事件的多波长研究如何帮助我们全面了解CCSNe中的恒星祖先和星周介质（CSM）相互作用。我们还强调了近红外（NIR）调查的重要性，在尘土飞扬的环境中SNE的早期检测。SN 2020 qmp在其光谱中显示出特征氢线，以及其光学LC中的平台，这是IIP SN类型的标志。我们没有检测到线性极化在平台阶段，3西格玛上限为0.78%。通过流体力学LC建模和星云光谱的分析，我们估计的祖质量约11太阳质量，爆炸能量约0.8e51尔格。我们发现，光谱能量分布不能解释一个简单的CSM相互作用模型，假设一个恒定的冲击速度和稳定的质量损失率，和过量的X射线光度相比，同步辐射射电光度表明偏离均分。最后，我们展示了近红外调查的优势，光学调查的尘埃遮蔽CCSNe在当地宇宙的检测。具体来说，我们的模拟表明，宽视场红外瞬态探测器将检测到约14个CCSNe的75预期在其足迹内40 Mpc，超过五年的光学调查相当于Zwicky瞬态设施将检测。我们已经确定或约束SN 2020 qmp及其祖先的主要属性，突出了附近CCSNe的多波长后续观测的价值。我们还表明，即将到来的NIR调查将最终使我们能够在本地宇宙中对CCSNe进行近乎完整的普查。
英文摘要：
We present a detailed analysis of SN 2020qmp, a nearby type IIP core-collapse supernova (CCSN), discovered by the Palomar Gattini-IR (PGIR) survey in the galaxy UGC07125. We illustrate how the multiwavelength study of this event helps our general understanding of stellar progenitors and circumstellar medium (CSM) interactions in CCSNe. We also highlight the importance of near-infrared (NIR) surveys for early detections of SNe in dusty environments. SN 2020qmp displays characteristic hydrogen lines in its optical spectra, as well as a plateau in its optical LC, hallmarks of a type IIP SN. We do not detect linear polarization during the plateau phase, with a 3 sigma upper limit of 0.78%. Through hydrodynamical LC modeling and an analysis of its nebular spectra, we estimate a progenitor mass of around 11 solar masses, and an explosion energy of around 0.8e51 erg. We find that the spectral energy distribution cannot be explained by a simple CSM interaction model, assuming a constant shock velocity and steady mass-loss rate, and the excess X-ray luminosity compared with the synchrotron radio luminosity suggests deviations from equipartition. Finally, we demonstrate the advantages of NIR surveys over optical surveys for the detection of dust-obscured CCSNe in the local universe. Specifically, our simulations show that the Wide-Field Infrared Transient Explorer will detect about 14 more CCSNe out of 75 expected in its footprint within 40 Mpc, over five years than an optical survey equivalent to the Zwicky Transient Facility would detect. We have determined or constrained the main properties of SN 2020qmp and of its progenitor, highlighting the value of multiwavelength follow-up observations of nearby CCSNe. We have also shown that forthcoming NIR surveys will finally enable us to do a nearly complete census of CCSNe in the local universe.
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