Skip to content

A model independent constraint on the temporal evolution of the speed of light

Research output: Contribution to journalArticlepeer-review

  • Dandan Wang
  • Hanyu Zhang
  • Jinglan Zheng
  • Yuting Wang
  • Gong-Bo Zhao
We present a new, model-independent method to reconstruct the temporal evolution of the speed of light c(z) using astronomical observations. After validating our pipeline using mock datasets, we apply our method to the latest BAO and supernovae observations, and reconstruct c(z) in the redshift range of z∈[0,1.5]. We find no evidence of a varying speed of light, although we see some interesting features of Δc(z), the fractional difference between c(z) and c0 (the speed of light in SI), \eg, Δc(z)<0 and Δc(z)>0 at 0.2≲z≲0.5 and 0.8≲z≲1.3, respectively, although the significance of these features is currently far below statistical importance.
Original languageEnglish
JournalResearch in Astronomy and Astrophysics
Publication statusAccepted for publication - 13 May 2019


  • Sol_Wang_RAAv2

    Rights statement: The embargo end date of 2050 is a temporary measure until we know the publication date. Once we know the publication date the full text of this article will be able to view shortly afterwards.

    Accepted author manuscript (Post-print), 682 KB, PDF document

    Due to publisher’s copyright restrictions, this document is not freely available to download from this website until: 1/01/50

Relations Get citation (various referencing formats)

ID: 14044625