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Searching for MHz gravitational waves from harmonic sources

Martinez, Jeronimo G. C. and Kamai, Brittany (2020) Searching for MHz gravitational waves from harmonic sources. Classical and Quantum Gravity, 37 (20). Art. No. 205006. ISSN 0264-9381.

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A MHz gravitational wave search for harmonic sources was conducted using a 704 h dataset obtained from the Holometer, a pair of 40 m power recycled Michelson interferometers. Our search was designed to look for cosmic string loops and eccentric black hole binaries in an entirely unexplored frequency range from 1 to 25 MHz. The measured cross-spectral density between both interferometers was used to perform four different searches. First, we search to identify any fundamental frequencies bins that have excess power above 5σ. Second, we reduce the per-bin threshold on any individual frequency bin by employing that a fundamental frequency and its harmonics all collectively lie above a threshold. We vary the number of harmonics searched over from n = 4 up to n = 23. Third, we perform an agnostic approach to identify harmonic candidates that may have a single contaminated frequency bin or follow a power-law dependence. Lastly, we expand on the agnostic approach for individual candidates and search for a potential underlying population of harmonic sources. Each method was tested on the interferometer dataset, as well as a dark noise, photon shot-noise-limited, and simulated Gaussian-noise datasets. We conclude that these four different search methods did not find any candidate frequencies that would be consistent with harmonic sources. This work presents a new way of searching for gravitational wave candidates, which allowed us to survey a previously unexplored frequency range.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Martinez, Jeronimo G. C.0000-0001-5878-0618
Kamai, Brittany0000-0001-6521-9351
Additional Information:© 2020 IOP Publishing Ltd. Received 23 December 2019, revised 11 July 2020; Accepted for publication 15 July 2020; Published 21 September 2020. We first want to acknowledge the support for the Holometer instrument and collaboration itself which made it possible to perform this analysis. The Holometer was supported through the Department of Energy at Fermilab under Contract No. DE-AC02-07CH11359 and the Early Career Research Program (FNAL FWP 11-03), and by grants from the John Templeton Foundation, the National Science Foundation (Grants No. PHY-1205254 and No. DGE-1144082), NASA (Grant No. NNX09AR38G), the Fermi Research Alliance, the Kavli Institute for Cosmological Physics, University of Chicago/Fermilab Strategic Collaborative Initiatives, and the Universities Research Association Visiting Scholars Program. Second, we would like to acknowledge support that enabled our research endeavors. Jeronimo Martinez Garcia-Cors was in part supported by the Kavli Institute of Cosmological Physics. Brittany Kamai was supported by Caltech California Alliance, Fisk-Vanderbilt Bridge and the Heising-Simons Postdoctoral Fellowships. Third, we would like to acknowledge the incredible mentorship provided to us by Stephen S Meyer and Craig Hogan. Both of them provided support and guidance throughout this entire project and more broadly had a strong influence on who we are as scientists. Fourth, we'd like to gratefully acknowledge the fruitful discussions with many talented scientists such as Sotiris Sandias, Katelyn Brevik, Kelly Holley-Bockelmann, Jess McIver, Lee McCuller and Jonathan Richardson about the theoretical and experimental scope of this project. Fifth, we would like to acknowledge the Indigenous people whose ancestral lands we were on during this project: we'd like to send our gratitude to the Kiikaapoi, Peoria, Bodèwadmiakiwen, Miami and Oceti Sakwin, Tongva, and Chumash peoples (thanks to the Native Land Digital project for making this information accessible). Sixth, we would like to extend our sincerest gratitude to our anonymous CQG reviewer whose detailed feedback helped shape this paper in substantial ways. Lastly, we would like to highlight the unconditional support we had from our friends and familiesthroughout the complexities associated with completing a new research project.
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC02-07CH11359
Fermi National Accelerator LaboratoryFNAL FWP 11-03
John Templeton FoundationUNSPECIFIED
NSF Graduate Research FellowshipDGE-1144082
Kavli Institute for Cosmological PhysicsUNSPECIFIED
University of ChicagoUNSPECIFIED
Universities Research AssociationUNSPECIFIED
Fisk UniversityUNSPECIFIED
Issue or Number:20
Record Number:CaltechAUTHORS:20201016-144359733
Persistent URL:
Official Citation:Jeronimo G. C. Martinez and Brittany Kamai 2020 Class. Quantum Grav. 37 205006
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106120
Deposited By: Tony Diaz
Deposited On:16 Oct 2020 22:05
Last Modified:16 Oct 2020 22:05

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