论文标题
进球：NGC 7469中的鼻刺戒指的Nircam和Miri成像
GOALS-JWST: NIRCam and MIRI Imaging of the Circumnuclear Starburst Ring in NGC 7469
论文作者
论文摘要
我们介绍了NGC 7469的James Webb太空望远镜（JWST）与近红外摄像头（NIRCAM）和中红外仪器（Miri）的成像。 NGC 7469是附近的，$ z = 0.01627 $，发光红外星系（LIRG）既有Seyfert Type-1.5核，又容纳了$ \ sim $ 0.5 kpc的seyfert type-1.5核和环核星爆。新的近红外（NIR）JWST成像揭示了66个恒星形成区域，其中37个未通过HST观测来检测到37个区域。这37个来源中有28个具有非常红色的NIR颜色，表明$ _ {\ rm {v}}} \ sim7 $的晦涩难懂，并且从热尘发射到4.4 $ $ m $ m频段的贡献至少为25 $ \％$。他们的NIR颜色也与年轻（$ 5 $ 5 MYR）的恒星种群一致，其中一半以上与Mir排放峰一致。这些年轻的，尘土飞扬的星形形成区域分别为$ \ sim $ 6 $ \％$和$ \ sim $ 17 $ \％$ \％$ \％$ \％$ \％$ $ \％$ $ \％$ $ \％$ $ m $ m和4.4 $ $ $ m m $ m m的光度。多亏了JWST，我们发现大量由于尘埃灭绝而没有看到的年轻尘土飞扬的来源。与HST检测的年轻来源的数量相比，新近确定的28个年轻来源显着增加（4-5）。这使得年轻人口的总百分比从$ \ sim $ 15 $ \％$ \％$ \％$ \％\％$。这些结果说明了JWST在AGN周围最密集的恒星形成环境中识别和表征先前隐藏的恒星形成的有效性。
We present James Webb Space Telescope (JWST) imaging of NGC 7469 with the Near-Infrared Camera (NIRCam) and the Mid-InfraRed Instrument (MIRI). NGC 7469 is a nearby, $z=0.01627$, luminous infrared galaxy (LIRG) that hosts both a Seyfert Type-1.5 nucleus and a circumnuclear starburst ring with a radius of $\sim$0.5 kpc. The new near-infrared (NIR) JWST imaging reveals 66 star-forming regions, 37 of which were not detected by HST observations. Twenty-eight of the 37 sources have very red NIR colors that indicate obscurations up to A$_{\rm{v}}\sim7$ and a contribution of at least 25$\%$ from hot dust emission to the 4.4$μ$m band. Their NIR colors are also consistent with young ($<$5 Myr) stellar populations and more than half of them are coincident with the MIR emission peaks. These younger, dusty star-forming regions account for $\sim$6$\%$ and $\sim$17$\%$ of the total 1.5$μ$m and 4.4$μ$m luminosity of the starburst ring, respectively. Thanks to JWST, we find a significant number of young dusty sources that were previously unseen due to dust extinction. The newly identified 28 young sources are a significant increase compared to the number of HST-detected young sources (4-5). This makes the total percentage of the young population rise from $\sim$15$\%$ to 48$\%$. These results illustrate the effectiveness of JWST in identifying and characterizing previously hidden star formation in the densest star-forming environments around AGN.
