The emergence of X-ray emission lines during relativistic radio-jet formation in the changing-look active galactic nucleus 1ES 1927+654

arXiv:2607.05246 · astro-ph.HE, astro-ph.GA, hep-ph · Submitted 2026-07-06 · Read on arXiv

Dev R. Sadaula, Sibasish Laha, Eileen T. Meyer, Onic I. Shuvo, Main Pal, Ritesh Ghosh, Matteo Guainazzi, Fabio Pacucci, Stefano Bianchi, Luigi Gallo, Rostom Mbarek, Amelia M. Hankla, Fabio La Franca, Tahir Yaqoob, Megan Masterson, Erin Kara, Missagh Mehdipour, Claudio Ricci, Javier A Garcia, Timothy R. Kallman, Ralf Ballhausen, Mitchell C. Begelman, Alexander Philippov, Suvendu Rakshit, Francesca Panessa, Ehud Behar, S. Bradley Cenko, Federica Ricci, Ilaria Villani, James N. Reeves

astro-ph.HE, astro-ph.GA, hep-ph

Submitted: 2026-07-06

Project page: https://heasarc.gsfc.nasa.gov/docs/software/xstar/xstar.html

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• AGN — 23× in this paper · explained in 1 episode
• Calibration — 5× in this paper · explained in 7 episodes
• Core — 5× in this paper · explained in 2 episodes
• Degeneracy — 5× in this paper · explained in 3 episodes
• Zwicky Transient Facility — 3× in this paper
• Alignment — 2× in this paper · explained in 1 episode
• Anti-correlation — 2× in this paper · explained in 3 episodes
• Accuracy — 1× in this paper · explained in 1 episode
• Active Galactic Nuclei — 1× in this paper
• Active Galactic Nuclei (AGN) — 1× in this paper · explained in 1 episode
• Guest Investigator — 1× in this paper
• Reflection Grating Spectrometer — 1× in this paper
• Telescope Nationale Galileo — 1× in this paper
• Ultra Fast Outflow — 1× in this paper
• Very Large Array — 1× in this paper
• Very Long Baseline Array — 1× in this paper

Sources

• Multi-wavelength observations of a jet launch in real time from the post-changing-look Active Galaxy 1ES 1927+654
• Persistence of the Millihertz X-ray Quasi-Periodic Oscillation in the Active Galactic Nucleus 1ES 1927+654
• Late-time radio brightening and emergence of a radio jet in the changing-look AGN 1ES 1927+654
• Changing-look Active Galactic Nuclei

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