HALO II: Constraining Hubble constant H 0 through continuum delay fitting of Fairall 9

arXiv:2606.27195 · astro-ph.GA, astro-ph.CO, gr-qc, hep-ph, hep-th · Submitted 2026-06-25 · Read on arXiv

Amit Kumar Mandal, Francisco Pozo Nuñez, Vikram Kumar Jaiswal, Mohammad Hassan Naddaf, Bożena Czerny, Swayamtrupta Panda, Paulina Karczmarek, Grzegorz Pietrzyński, Shivangi Pandey, R. Edelson, B. M. Peterson, Michal Zajaček, Alberto Floris, Mary Loli Martínez-Aldama, Michal Dovčiak, Vladimir Karas, Weronika Narloch, Mirosław Kicia, Marek Górski, Mikołaj Kałuszyński, Gergely Hajdu, Piotr Wielgórski, Bartłomiej Zgirski, Cezary Gałan, Wojciech Pych, Radosław Smolec, Ricardo Salinas, Henryka Netzel-Iłkiewicz, Karolina Bąkowska, Wolfgang Gieren, Pierre Kervella

astro-ph.GA, astro-ph.CO, gr-qc, hep-ph, hep-th

Submitted: 2026-06-25

Comments: Submitted to A&A, 19 pages, 11 figures, and 2 tables

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

Terminology

• AGN — 95× in this paper · explained in 1 episode
• Hubble Tension — 4× in this paper · explained in 9 episodes
• Metallicity — 4× in this paper · explained in 3 episodes
• Robustness — 4× in this paper · explained in 5 episodes
• Calibration — 3× in this paper · explained in 7 episodes
• Consistency — 3× in this paper · explained in 3 episodes
• Microlensing — 3× in this paper · explained in 2 episodes
• Unified Framework — 2× in this paper · explained in 5 episodes
• Accuracy — 1× in this paper · explained in 1 episode
• Cooperation — 1× in this paper · explained in 2 episodes
• Distribution Shift — 1× in this paper · explained in 5 episodes
• Generative AI — 1× in this paper · explained in 2 episodes
• Homogeneity — 1× in this paper · explained in 2 episodes
• Ionization Parameter (U) — 1× in this paper · explained in 2 episodes
• Legacy Survey of Space and Time — 1× in this paper
• Trace — 1× in this paper · explained in 2 episodes

Sources

• The subtle statistics of the distance ladder: On the distance prior and selection effects
• The Local Distance Network: a community consensus report on the measurement of the Hubble constant at 1% precision
• The Binary Ballet: Mapping Local Expansion Around M81 & M82

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