论文标题
JWST直接观察系外星系的直接观察I：系外行星髋关节65426 b的高对比度成像，从2-16 $μ$ m
The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems I: High Contrast Imaging of the Exoplanet HIP 65426 b from 2-16 $μ$m
论文作者
论文摘要
我们提出了JWST的早期发行科学（ERS）的冠状发行术观察，对超奏，髋关节65426 b，近红外摄像头（Nircam）从2-5 $ $ m $ m $ m $ m，并带有11-16 $ $ m $ m $ m的中印刷仪器（Miri）。以$ \ sim $ 0.82“（86 $^{+116} _ { - 31} $ au）的分离，在我们所有的七个观察过滤器中清楚地检测到了hip 65426 b，代表了jwst的第一个exoplanet的第一批图像，并且是jwst的第一个直接检测到的exoplanet exoplanet yexplane yexplanet yexplanet yexplanet the exoplanet your j。根据分离和减法方法，其名义预测的性能高达10倍，并测量5 $σ$对比度为$ \ sim $ 1 $ 1 $ \ times10^{ - 5} $和$ \ sim $ \ sim $ \ sim $ \ times10^{ - 4} $ at Nircam at Nircam in 4.4 $ $ m $ m和miri $ miri和11.3 $ miri at nircam at 1英寸。这些对比限制为子jupiter伴侣提供敏感性，其质量低至0.3 $ m_ \ mathrm {jup} $，超过了$ \ sim $ 100 au的分离。与现有的地面近红外数据一起，JWST光度法非常适合BT-SETTL大气型号，从1-16 $μ$ M，而Span $ \ sim $ \ sim $ 97％的hip 65426 b的发光范围。独立于模型气氛的选择，我们测量了一种经验性隆重的光度，该降度在$ \ mathrm {log} \！！\ left（l_ \ mathrm {bolm {bol}/l _ {\ odot} \ right）之间$ m_ \ mathrm {jup} $。总体而言，这些观察结果证实，JWST提供了一个强大而令人兴奋的机会，以更详细地描述可与高对比度成像相关的系外行星人群。
We present JWST Early Release Science (ERS) coronagraphic observations of the super-Jupiter exoplanet, HIP 65426 b, with the Near-Infrared Camera (NIRCam) from 2-5 $μ$m, and with the Mid-Infrared Instrument (MIRI) from 11-16 $μ$m. At a separation of $\sim$0.82" (86$^{+116}_{-31}$ au), HIP 65426 b is clearly detected in all seven of our observational filters, representing the first images of an exoplanet to be obtained by JWST, and the first ever direct detection of an exoplanet beyond 5 $μ$m. These observations demonstrate that JWST is exceeding its nominal predicted performance by up to a factor of 10, depending on separation and subtraction method, with measured 5$σ$ contrast limits of $\sim$1$\times10^{-5}$ and $\sim$2$\times10^{-4}$ at 1" for NIRCam at 4.4 $μ$m and MIRI at 11.3 $μ$m, respectively. These contrast limits provide sensitivity to sub-Jupiter companions with masses as low as 0.3$M_\mathrm{Jup}$ beyond separations of $\sim$100 au. Together with existing ground-based near-infrared data, the JWST photometry are well fit by a BT-SETTL atmospheric model from 1-16 $μ$m, and span $\sim$97% of HIP 65426 b's luminous range. Independent of the choice of model atmosphere we measure an empirical bolometric luminosity that is tightly constrained between $\mathrm{log}\!\left(L_\mathrm{bol}/L_{\odot}\right)$=-4.31 to $-$4.14, which in turn provides a robust mass constraint of 7.1$\pm$1.2 $M_\mathrm{Jup}$. In totality, these observations confirm that JWST presents a powerful and exciting opportunity to characterise the population of exoplanets amenable to high-contrast imaging in greater detail.
