English

New $H(z)$ measurement at Redshift = 0.12 with DESI Data Release 1

Cosmology and Nongalactic Astrophysics 2026-05-20 v2 Astrophysics of Galaxies

Abstract

The Hubble parameter (H(z)H(z)) is a function of the redshift and a reliable measurement is very important to understand the expansion history of the Universe. In this work, we perform full-spectrum fitting using BAGPIPES on more than four thousand massive, passively evolving galaxies released by the DESI collaboration to estimate their cosmological-independent stellar ages and star-formation histories, and derive a new measurement of H(z=0.12)=71.33±4.20 km s1 Mpc1H(z=0.12)=71.33 \pm 4.20~{\rm km~s^{-1}~Mpc^{-1}}, which is well consistent with those derived in other ways.

Keywords

Cite

@article{arxiv.2601.07345,
  title  = {New $H(z)$ measurement at Redshift = 0.12 with DESI Data Release 1},
  author = {Ze-fan Wang and Lei Lei and Yi-zhong Fan},
  journal= {arXiv preprint arXiv:2601.07345},
  year   = {2026}
}

Comments

21 pages, 10 figures, accepted for publication in ApJ