Pith. sign in

REVIEW

The pulsating white dwarf G117-B15A: still the most stable optical clock known

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2010.16062 v2 pith:ZZN2OONT submitted 2020-10-28 astro-ph.SR

S.O. Kepler , D.E. Winget , Zachary P. Vanderbosch , Barbara Garcia Castanheira , J.J. Hermes , Keaton J. Bell , Fergal Mullally , Alejandra D. Romero
show 9 more authors
M. H. Montgomery Steven DeGennaro Karen I. Winget Dean Chandler Elizabeth J. Jeffery Jamile K. Fritzen Kurtis A. Williams Paul Chote Staszek Zola
This is my paper · ORCID
classification astro-ph.SR
keywords observedopticalperiodchangeclockdwarfpulsatingpulsation
verification ladder T0 review T1 audit T2 compute T3 formal
0 comments
read the original abstract

The pulsating hydrogen atmosphere white dwarf star G 117-B15A has been observed since 1974. Its main pulsation period at 215.19738823(63) s, observed in optical light curves, varies by only (5.12+/-0.82)x10^{-15} s/s and shows no glitches, as pulsars do. The observed rate of period change corresponds to a change of the pulsation period by 1 s in 6.2 million years. We demonstrate that this exceptional optical clock can continue to put stringent limits on fundamental physics, such as constraints on interaction from hypothetical dark matter particles, as well as to search for the presence of external substellar companions.

Discussion (0). Continue with ORCID to comment.

Pith tools