Sub-percentage measure of distances to redshift of 0.1 by a new cosmic ruler
Abstract
Distance-redshift diagrams probe expansion history of the Universe. We show that the stellar mass-binding energy (massE) relation of galaxies proposed in our previous study offers a new distance ruler at cosmic scales. By using elliptical galaxies in the main galaxy sample of the Sloan Digital Sky Survey Data Release 7, we construct a distance-redshift diagram over the redshift range from 0.05 to 0.2 with the massE ruler. The best-fit dark energy density is 0.675 ± 0.079 for flat Λ-cold dark matter (ΛCDM) model, consistent with those by other probes. At the median redshift of 0.11, the median distance is estimated to have a fractional error of 0.34 per cent, much lower than those by supernova (SN) Ia and baryonic acoustic oscillation (BAO) and even exceeding their future capability at this redshift. The above low-$\mathit{ z}$ measurement is useful for probing dark energy that dominates at the late Universe. For a flat dark energy equation of state model (flat wCDM), the massE alone constrains w to an error that is only a factor of 2.2, 1.7, and 1.3 times larger than those by BAO, SN Ia, and cosmic microwave background (CMB), respectively.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 19, 2022
- Source ID
- 10.1093/mnras/stac2284
Entities
People
- Qiusheng Gu
- Shude Mao
- Tao Wang
- Xiaoyang Xia
- Yanmei Chen
- Yong Shi
- Zhi-Yu Zhang
Organizations
- Alfred P. Sloan Foundation
- American Museum of Natural History
- Case Western Reserve University
- Chinese Academy of Sciences
- Drexel University
- Higher Education Funding Council for England
- Institute for Advanced Study
- Johns Hopkins University
- Los Alamos National Laboratory
- Max Planck Society
- Nanjing University
- National Aeronautics and Space Administration
- National Astronomical Observatory of China
- National Natural Science Foundation of China
- National Science Foundation
- New Mexico State University
- Ohio State University
- Princeton University
- Tianjin Normal University
- Tsinghua University
- United States Department of Energy
- United States Naval Observatory
- University of Basel
- University of Cambridge
- University of Chicago
- University of Pittsburgh
- University of Portsmouth
- University of Washington