论文标题
在星形的星系中发现Atlas17JRP作为光学，X射线和红外亮点TDE
Discovery of ATLAS17jrp as an Optical, X-ray and Infrared Bright TDE in a Star-forming Galaxy
论文作者
论文摘要
我们在此报告，在我们最近在附近星系中的中红外爆发样本中，ATLAS17JRP是星形星系SDSSSSJ162034.99+240726.5中发现了ATLAS17JRP的非凡TDE。 Its optical/UV light curves rise to a peak luminosity $\sim1.06\times10^{44}\rm\,erg\,s^{-1}$ in about a month and then decay as $\rm t^{-5/3}$ with a roughly constant temperature around 19000~K, and the optical spectra show a blue continuum and very broad Balmer lines with fwhm $ \ sim $ 15000 km/s，在4年内逐渐缩小到1400 km/s，所有这些都与其他光学TDE吻合。以峰值光度$ \ rm \ sim 1.27 \ times10^{43} \，erg \ \，s^{ - 1} $的延迟且快速上升的X射线耀斑在光峰后以$ \ rm \ sim $ 170的形式检测到。 The high MIR luminosity of ATLAS17jrp ($\sim2\times10^{43} \rm\,erg\,s^{-1}$) has revealed a distinctive dusty environment with covering factor as high as $\sim0.2$, that is comparable with that of torus in active galactic nuclei but at least one order of magnitude higher than normal optical TDEs.因此，ATLAS17JRP事实证明是在星形星系中发现的罕见的明确TDE之一，其高灰尘覆盖因子意味着，在恒星形成星系中没有光学TDE的情况下，粉尘灭绝可能起着重要作用。
We hereby report the discovery of ATLAS17jrp as an extraordinary TDE in star-forming galaxy SDSSJ162034.99+240726.5 in our recent sample of mid-infrared outbursts in nearby galaxies. Its optical/UV light curves rise to a peak luminosity $\sim1.06\times10^{44}\rm\,erg\,s^{-1}$ in about a month and then decay as $\rm t^{-5/3}$ with a roughly constant temperature around 19000~K, and the optical spectra show a blue continuum and very broad Balmer lines with FWHM$\sim$15000 km/s which gradually narrowed to 1400 km/s within 4 years, all agreeing well with other optical TDEs. A delayed and rapidly rising X-ray flare with a peak luminosity $\rm \sim 1.27\times10^{43}\,erg\,s^{-1}$ was detected at $\rm \sim$ 170 days after the optical peak. The high MIR luminosity of ATLAS17jrp ($\sim2\times10^{43} \rm\,erg\,s^{-1}$) has revealed a distinctive dusty environment with covering factor as high as $\sim0.2$, that is comparable with that of torus in active galactic nuclei but at least one order of magnitude higher than normal optical TDEs. Therefore, ATLAS17jrp turns out to be one of the rare unambiguous TDE found in star-forming galaxies and its high dust covering factor implies that the dust extinction could play an important role in the absence of optical TDEs in star-forming galaxies.
