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Ho’oleilana: An Individual Baryon Acoustic Oscillation?

  • Authors: R. Brent Tully, Cullan Howlett, Daniel Pomarède

R. Brent Tully et al 2023 The Astrophysical Journal 954 .

  • Provider: AAS Journals

Caption: Figure 10.

Cosmological constraints from fitting Ho’oleilana with a BAO model using the uncertainty from Ho’oleilana alone allowing for uncertainty in the central location (blue) or using the the scatter seen in BAO simulations as the uncertainty fixing to our most likely center for Ho’oleilana (red). α is our BAO scaling parameter, D v /r drag is the ratio between the distance to the center of Ho’oleilana and its size, while z is the redshift to its center. From these pieces of information, and assuming constraints on r drag from early Universe physics, we obtain constraints on the matter content Ω m and present-day expansion rate of the Universe H 0 that favor other local direct measurements (orange band) rather than that propagated from models of the early Universe (green band).

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