تقرير
GOALS-JWST: NIRCam and MIRI Imaging of the Circumnuclear Starburst Ring in NGC 7469
| العنوان: | GOALS-JWST: NIRCam and MIRI Imaging of the Circumnuclear Starburst Ring in NGC 7469 |
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| المؤلفون: | Bohn, Thomas, Inami, Hanae, Diaz-Santos, Tanio, Armus, Lee, Linden, Sean T., U, Vivian, Surace, Jason, Larson, Kirsten L., Evans, Aaron S., Hoshioka, Shunshi, Lai, Thomas, Song, Yiqing, Mazzarella, Joseph M., Barcos-Munoz, Loreto, Charmandaris, Vassilis, Howell, Justin H., Medling, Anne M., Privon, George C., Rich, Jeffrey A., Stierwalt, Sabrina, Aalto, Susanne, Boker, Torsten, Brown, Michael J. I., Iwasawa, Kazushi, Malkan, Matthew A., van der Werf, Paul P., Appleton, Philip, Hayward, Christopher C., Kemper, Francisca, Law, David, Marshall, Jason, Murphy, Eric J., Sanders, David |
| سنة النشر: | 2022 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies |
| الوصف: | 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$\mu$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$\mu$m and 4.4$\mu$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. Comment: 4 figures, 1 table, Accepted by ApJL |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.3847/2041-8213/acab61 |
| الوصول الحر: | http://arxiv.org/abs/2209.04466Test |
| رقم الانضمام: | edsarx.2209.04466 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.3847/2041-8213/acab61 |
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