论文标题
高红移BL LAC对象的Nustar观测和多波长建模4FGL J2146.5-1344
NuSTAR Observations and multi-wavelength modeling of the high-redshift BL Lac Object 4FGL J2146.5-1344
论文作者
论文摘要
高同步峰（HSP; $ν_{sy}^{pk}> 10^{15} $ hz）bl lacs是宇宙中最极端的加速器。在高红移（$ z> 1 $）上发现的那些人挑战了我们对Blazar进化模型的理解，对于宇宙学的测量值至关重要。在本文中，我们研究了使用光度掉落技术的高$ z $ bl lac，4FGL J2146.5-1344。为了研究其光谱能量分布（SED），我们收集了该源的多波长数据。特别是，首次使用Nustar观察到该来源，该来源准确地测量了该Blazar最高50 keV的同步加速器发射。尽管被归类为HSP BL LAC对象，但SED的建模揭示了该来源可能属于“伪装的BL Lac”类，该类别由FSRQ组成，看起来像是伪装的BL LAC对象。
High synchrotron peak (HSP; $ν_{sy}^{pk} > 10^{15}$ Hz) BL Lacs are some of the most extreme accelerators in the Universe. Those found at high redshifts ($z>1$) challenge our understanding of blazar evolution models and are crucial for cosmological measurements of the Extragalactic Background Light. In this paper, we study a high-$z$ BL Lac, 4FGL J2146.5-1344, detected to be at $z$=1.34 using the photometric dropout technique. We collected multi-wavelength data for this source from optical up to $γ$-rays, in order to study its spectral energy distribution (SED). In particular, this source was observed for the first time with NuSTAR, which accurately measures the synchrotron emission of this blazar up to 50 keV. Despite being classified as an HSP BL Lac object, the modeling of the SED reveals that this source likely belongs to the "masquerading BL Lac" class, which comprises of FSRQs appearing as disguised BL Lac objects.
