典型文献
The Potential of Detecting Radio-flaring Ultracool Dwarfs at L band in the FAST Drift-scan Survey
文献摘要：
The Five-hundred-meter Aperture Spherical radio Telescope (FAST) completed its commissioning and began the Commensal Radio Astronomy FasT Survey (CRAFTS), a multi-year survey to cover 60％of the sky, in 2020. We present predictions for the number of radio-flaring ultracool dwarfs (UCDs) that are likely to be detected by CRAFTS. Based on the observed flaring UCDs from a number of unbiased, targeted radio surveys in the literature, we derive a detection rate of≥3％. Assuming a flat radio spectrumνLν∝νβ+1 withβ=-1.0 for UCD flares, we construct a flare luminosity function dN/dL enough for flares from UCDs up to～180 pc. Considering the Galactic thin disk, we carry out a 3D Monte Carlo simulation of the UCD population, which is then fed to mock CRAFTS observations. We estimate that ～170 flaring UCDs would be detected through transient searches in circular polarization. Though only marginally sensitive to the scale height of UCDs, the results are very sensitive to the assumed spectral indexβ. Forβfrom 0 to-2.5, the number of expected detections increases dramatically from ～20 to ～3460. We also contemplate the strategies for following up candidates of flaring UCDs, and discuss the implications of survey results for improving our knowledge of UCD behavior at L band and dynamos.
文献关键词：
中图分类号：
作者姓名：
Jing Tang;Chao-Wei Tsai;Di Li
作者机构：
CAS Key Laboratory of FAST,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China;NAOC-UKZN Computational Astrophysics Centre,University of KwaZulu-Natal,Durban 4000,South Africa
文献出处：
引用格式：
[1]Jing Tang;Chao-Wei Tsai;Di Li-.The Potential of Detecting Radio-flaring Ultracool Dwarfs at L band in the FAST Drift-scan Survey)[J].天文和天体物理学研究,2022(06):126-141
A类：
flaring,Ultracool,Dwarfs,FasT,CRAFTS,ultracool,dwarfs,UCDs,contemplate
B类：
Potential,Detecting,Radio,band,FAST,Drift,scan,Survey,Five,hundred,meter,Aperture,Spherical,radio,Telescope,completed,its,commissioning,began,Commensal,Astronomy,multi,year,cover,sky,We,present,predictions,number,that,likely,detected,by,Based,observed,from,unbiased,targeted,surveys,literature,we,derive,Assuming,flat,spectrum,+1,flares,construct,luminosity,function,dN,dL,enough,up,pc,Considering,Galactic,thin,disk,carry,out,Monte,Carlo,simulation,population,which,then,fed,mock,observations,estimate,would,through,transient,searches,circular,polarization,Though,only,marginally,sensitive,scale,height,results,very,assumed,spectral,For,expected,detections,increases,dramatically,also,strategies,following,candidates,discuss,implications,improving,our,knowledge,behavior,dynamos
AB值：
0.528979
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