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Uncovering a Massive z ∼ 7.7 Galaxy Hosting a Heavily Obscured Radio-loud Active Galactic Nucleus Candidate in COSMOS-Web

  • Authors: Erini Lambrides, Marco Chiaberge, Arianna S. Long, Daizhong Liu, Hollis B. Akins, Andrew F. Ptak, Irham Taufik Andika, Alessandro Capetti, Caitlin M. Casey, Jaclyn B. Champagne, Katherine Chworowsky, Tracy E. Clarke, Olivia R. Cooper, Xuheng Ding, Dillon Z. Dong, Andreas L. Faisst, Jordan Y. Forman, Maximilien Franco, Steven Gillman, Ghassem Gozaliasl, Kirsten R. Hall, Santosh Harish, Christopher C. Hayward, Michaela Hirschmann, Taylor A. Hutchison, Knud Jahnke, Shuowen Jin, Jeyhan S. Kartaltepe, Emma T. Kleiner, Anton M. Koekemoer, Vasily Kokorev, Sinclaire M. Manning, Crystal L. Martin, Jed McKinney, Colin Norman, Kristina Nyland, Masafusa Onoue, Brant E. Robertson, Marko Shuntov, John D. Silverman, Massimo Stiavelli, Benny Trakhtenbrot, Eleni Vardoulaki, Jorge A. Zavala, Natalie Allen, Olivier Ilbert, Henry Joy McCracken, Louise Paquereau, Jason Rhodes, Sune Toft

Erini Lambrides et al 2024 The Astrophysical Journal Letters 961 .

  • Provider: AAS Journals

Caption: Figure 1.

Radio SED: all fluxes and associated errors are listed in Table 1. We measure the spectral slope between two sets of radio frequencies (blue line, orange line) and find significant spectral steepening indicative of high-z RL AGN (Saxena et al. 2018a; Broderick et al. 2022; Endsley et al. 2023). In the upper-right corner inset, we show the radio SED for the z spec = 6.8 heavily obscured RL AGN from Endsley et al. (2023) for reference.

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