Exploring the Radio Spectral Energy Distribution of the Ultraluminous Radio-quiet Quasar SDSS J0100+2802 at Redshift 6.3
| العنوان: | Exploring the Radio Spectral Energy Distribution of the Ultraluminous Radio-quiet Quasar SDSS J0100+2802 at Redshift 6.3 |
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| المؤلفون: | Yuanqi Liu, Ran Wang, Emmanuel Momjian, Jeff Wagg, Xiaolong Yang, Tao An, Yali Shao, Chris L. Carilli, Xue-Bing Wu, Xiaohui Fan, Fabian Walter, Linhua Jiang, Qiong Li, Jianan Li, Qinyue Fei, Fuxiang Xu |
| المساهمون: | Liu, Y [0000-0001-9321-6000], Wang, R [0000-0003-4956-5742], Momjian, E [0000-0003-3168-5922], Yang, X [0000-0002-4439-5580], An, T [0000-0003-4341-0029], Shao, Y [0000-0002-1478-2598], Carilli, CL [0000-0001-6647-3861], Wu, XB [0000-0002-7350-6913], Fan, X [0000-0003-3310-0131], Walter, F [0000-0003-4793-7880], Jiang, L [0000-0003-4176-6486], Li, Q [0000-0002-3119-9003], Li, J [0000-0002-1815-4839], Apollo - University of Cambridge Repository |
| بيانات النشر: | American Astronomical Society, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Space and Planetary Science, 5101 Astronomical Sciences, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - Astrophysics of Galaxies, 51 Physical Sciences, Astrophysics::Galaxy Astrophysics |
| الوصف: | We report deep Karl G. Jansky Very Large Array (VLA) observations of the optically ultraluminous and radio-quiet quasar SDSS J010013.02 + 280225.8 (hereafter J0100+2802) at redshift $z=$6.3. We detected the radio continuum emission at 1.5 GHz, 6 GHz, and 10 GHz. This leads to a radio power-law spectral index of $\alpha = -0.52\pm0.18$ ($S \propto \nu^{\alpha}$). The radio source is unresolved in all VLA bands with an upper limit to the size of $0.2^{\prime \prime}$ (i.e., $\sim$ 1.1 kpc) at 10 GHz. We find variability in the flux density (increase by $\sim 33\%$) and the spectral index (steepened) between observations in 2016 and 2017. We also find that the VLA 1.5 GHz flux density observed in the same year is 1.5 times that detected with the Very Long Baseline Array (VLBA) in 2016 at the same frequency. This difference suggests that half of the radio emission from J0100+2802 comes from a compact core within 40 pc, and the rest comes from the surrounding few kpc area which is diffuse and resolved out in the VLBA observations. The diffuse emission is four times brighter than that would be expected if driven by star formation. We conclude that the central active galactic nucleus is the dominant power engine of the radio emission in J0100+2802. Comment: 9 pages, 3 figures. Accepted for publication in The Astrophysical Journal |
| وصف الملف: | text/xml; application/pdf |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b738c48d41491709bcd064d4be32fae3 https://www.repository.cam.ac.uk/handle/1810/336061 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....b738c48d41491709bcd064d4be32fae3 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |