MHz gravitational wave constraints with decameter Michelson interferometers

Holometer Collaboration

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52 Scopus citations


A new detector, the Fermilab Holometer, consists of separate yet identical 39-meter Michelson interferometers. Strain sensitivity achieved is better than 10-21/Hz between 1 to 13 MHz from a 130-h data set. This measurement exceeds the sensitivity and frequency range made from previous high frequency gravitational wave experiments by many orders of magnitude. Constraints are placed on a stochastic background at 382 Hz resolution. The 3σ upper limit on ΩGW, the gravitational wave energy density normalized to the closure density, ranges from 5.6×1012 at 1 MHz to 8.4×1015 at 13 MHz. Another result from the same data set is a search for nearby primordial black hole binaries (PBHB). There are no detectable monochromatic PBHBs in the mass range 0.83-3.5×1021 g between the Earth and the Moon. Projections for a chirp search with the same data set increase the mass range to 0.59-2.5×1025 g and distances out to Jupiter. This result presents a new method for placing limits on a poorly constrained mass range of primordial black holes. Additionally, solar system searches for PBHBs place limits on their contribution to the total dark matter fraction.

Original languageEnglish (US)
Article number063002
JournalPhysical Review D
Issue number6
StatePublished - Mar 3 2017

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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