The hosts of two low-luminosity high-z quasars, J2255+0251 and J2236+0032, were recently detected using JWST’s NIRCam instrument. These represent the first high-z quasar host galaxy stellar detections and open a new window into studying high-z quasars. We examine the implications of the measured properties of J2255+0251 and J2236+0032 within the context of the hydrodynamic simulation BlueTides at z = 6.5. We find that these observed quasars fall on the BlueTides stellar to black hole mass relation and have similar luminosities to the brightest simulated quasars. We predict their star formation rates, estimating approximately 102 − 3 $M_{\odot }/ \rm yr$ for both quasar hosts. J2255+0251 and J2236+0032’s host galaxy radii also fall within estimates of the radii of the simulated host galaxies of similar luminosity quasars. We generate mock JWST NIRCam images of analogs to the observed quasars within BlueTides and perform a point source removal to illustrate both a qualitative and quantitative comparison of the measured and simulated radii and magnitudes. The quasar subtraction works well for similar luminosity quasars, and the recovered host images are consistent with what was observed for J2255+0251 and J2236+0032, further supporting the success of those observations. We also use our mock imaging pipeline to make predictions for the detection of J2255+0251 and J2236+0032’s hosts in upcoming JWST observations. We anticipate that the simulation analogs of future high-z quasar host discoveries will allow us to make accurate predictions of their properties beyond the capabilities of JWST.

中文翻译：

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JWST 观测到的高 z 类星体的模拟宿主星系类似物

最近使用 JWST 的 NIRCam 仪器探测到了两个低光度高 z 类星体 J2255+0251 和 J2236+0032 的宿主。这些代表了第一个高z类星体宿主星系恒星的探测，并为研究高z类星体打开了一个新窗口。我们在 z = 6.5 的 BlueTides 流体动力学模拟背景下研究了 J2255+0251 和 J2236+0032 的测量特性的含义。我们发现这些观测到的类星体符合蓝潮恒星与黑洞的质量关系，并且与最亮的模拟类星体具有相似的光度。我们预测了它们的恒星形成率，估计两个类星体宿主的恒星形成率约为 102 − 3 $M_{\odot }/ \rm yr$。 J2255+0251和J2236+0032的宿主星系半径也落在相似光度类星体的模拟宿主星系半径的估计范围内。我们生成与 BlueTides 中观测到的类星体类似的模拟 JWST NIRCam 图像，并执行点源去除，以说明测量和模拟的半径和星等的定性和定量比较。类星体减法对于类似光度类星体效果很好，并且恢复的主图像与 J2255+0251 和 J2236+0032 的观测结果一致，进一步支持了这些观测的成功。我们还使用模拟成像管道对即将到来的 JWST 观测中 J2255+0251 和 J2236+0032 宿主的检测进行预测。我们预计，未来高 z 类星体宿主发现的模拟模拟将使我们能够对其属性做出超出 JWST 能力的准确预测。