论文标题
重新访问仙女座的降落伞
Revisiting Andromeda's Parachute
论文作者
论文摘要
重力镜头系统PS J0147+4630（Andromeda的降落伞）由四个类星体图像ABCD和一个镜头星系组成。我们在2017 $ - $ 2021时期获得了$ r $ band灯曲线，并从两个2-M级望远镜的监视中获得了$ 2021的时期。这些曲线和最先进的曲线变动算法导致相对于图像A的三个独立时间延迟，其中之一是足够准确的（约4％的不确定性），用于宇宙学研究。我们对2010年$ - $ 2013年的微取样光曲线和一些其他通量也证明了显着的微透镜变化。本文还重点介绍了2018年ABCD的新近红外光谱 - 2019年 - $ 2019源自两个10米级望远镜的档案数据。我们分析了光谱区域，包括MGII，H $β$，[OIII]和H $α$排放线（0.9 $ -2.4 $ $ m $ m），测量图像通量比和可靠的Quasar Redshift 2.357 $ \ pm $ 0.002，以及在H $ al $α$α$α$α$α$α$α$α$ 0.002的证据。此外，我们更新了系统的镜头质量模型，并估计了Quasar黑洞对数质量$ {\ log \ weft [m _ {\ rm {\ rm {bh}}}/\ rm {m _ {\ odot}}}}}} \ right]} $ = 9.34 $ \ pm $ 0.30。
The gravitational lens system PS J0147+4630 (Andromeda's Parachute) consists of four quasar images ABCD and a lensing galaxy. We obtained $r$-band light curves of ABCD in the 2017$-$2021 period from a monitoring with two 2-m class telescopes. These curves and state-of-the-art curve-shifting algorithms led to three independent time delays relative to image A, one of which is accurate enough (uncertainty of about 4%) to be used in cosmological studies. Our finely sampled light curves and some additional fluxes in the years 2010$-$2013 also demonstrated the presence of significant microlensing variations. This paper also focused on new near-IR spectra of ABCD in 2018$-$2019 that were derived from archive data of two 10-m class telescopes. We analysed the spectral region including the MgII, H$β$, [OIII], and H$α$ emission lines (0.9$-$2.4 $μ$m), measuring image flux ratios and a reliable quasar redshift of 2.357 $\pm$ 0.002, and finding evidence of an outflow in the H$α$ emission. In addition, we updated the lens mass model of the system and estimated a quasar black-hole logarithmic mass ${\log \left[ M_{\rm{BH}}/\rm{M_{\odot}} \right]}$ = 9.34 $\pm$ 0.30.
