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Other research product . Other ORP type . 2020

The Araucaria Project Establishes the Most Precise Benchmark for Cosmic Distances

Pietrzyński, G.; Graczyk, D.; Gallenne, A.; Gieren, W.; Thompson, I.; Pilecki, B.; Karczmarek, P.; +14 Authors
Published: 01 Mar 2020
Publisher: HAL CCSD
Country: France
The Messenger, vol. 179, p. 24-28; In the last 20 years, over the course of the Araucaria project, we have studied 20 very special eclipsing binary systems in the Large Magellanic Cloud (LMC). Based on these systems and our newly calibrated surface brightness-colour relation we have measured a distance to the LMC that is accurate to 1%. This is currently the best benchmark for cosmic distances and it will therefore impact several fields of astrophysics. In particular, it has allowed a determination of the Hubble constant with a precision of 1.9%.

[SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]

Related Organizations
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Funded by
EC| CepBin
A sub-percent distance scale from binaries and Cepheids
  • Funder: European Commission (EC)
  • Project Code: 695099
  • Funding stream: H2020 | ERC | ERC-ADG
ANR| UnlockCepheids
Unlocking the potential of Cepheids as primary distance calibrators
  • Funder: French National Research Agency (ANR) (ANR)
  • Project Code: ANR-15-CE31-0012