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The NANOGrav 15 yr Data Set: Search for Gravitational-wave Memory

Lookup NU author(s): Dr Anne ArchibaldORCiD

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

© 2025. The Author(s). Published by the American Astronomical Society.We present the results of a search for nonlinear gravitational-wave (GW) memory in the NANOGrav 15 yr data set. We find no significant evidence for memory signals in the data set, with a maximum Bayes factor of 3.1 in favor of a model including memory. We therefore place upper limits on the strain of potential GW memory events as a function of sky location and observing epoch. We find upper limits that are not always more constraining than previous NANOGrav results. We show that it is likely due to the increase in common red noise between the 12.5 and 15 yr NANOGrav data sets.

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Author(s): Agazie G, Anumarlapudi A, Archibald AM, Arzoumanian Z, Baier JG, Baker PT, Becsy B, Blecha L, Brazier A, Brook PR, Burke-Spolaor S, Burnette R, Casey-Clyde JA, Charisi M, Chatterjee S, Cohen T, Cordes JM, Cornish NJ, Crawford F, Cromartie HT, Crowter K, DeCesar ME, Demorest PB, Deng H, Dey L, Dolch T, Ferrara EC, Fiore W, Fonseca E, Freedman GE, Gardiner EC, Garver-Daniels N, Gentile PA, Gersbach KA, Glaser J, Good DC, Gultekin K, Hazboun JS, Jennings RJ, Johnson AD, Jones ML, Kaplan DL, Kelley LZ, Kerr M, Key JS, Laal N, Lam MT, Lamb WG, Larsen B, Lazio TJW, Lewandowska N, Liu T, Lorimer DR, Luo J, Lynch RS, Ma C-P, Madison DR, McEwen A, McKee JW, McLaughlin MA, McMann N, Meyers BW, Meyers PM, Mingarelli CMF, Mitridate A, Natarajan P, Ng C, Nice DJ, Ocker SK, Olum KD, Pennucci TT, Perera BBP, Petrov P, Pol NS, Radovan HA, Ransom SM, Ray PS, Runnoe JC, Saffer A, Sardesai SC, Schmiedekamp A, Schmiedekamp C, Schmitz K, Shapiro-Albert BJ, Siemens X, Simon J, Siwek MS, Fiscella SVS, Stairs IH, Stinebring DR, Stovall K, Sun JP, Susobhanan A, Swiggum JK, Taylor J, Taylor SR, Turner JE, Unal C, Vallisneri M, van Haasteren R, Vigeland SJ, Wahl HM, Witt CA, Wright D, Young O

Publication type: Article

Publication status: Published

Journal: Astrophysical Journal

Year: 2025

Volume: 987

Issue: 1

Print publication date: 01/07/2025

Online publication date: 23/06/2025

Acceptance date: 12/05/2025

Date deposited: 10/07/2025

ISSN (print): 0004-637X

ISSN (electronic): 1538-4357

Publisher: Institute of Physics

URL: https://doi.org/10.3847/1538-4357/add874

DOI: 10.3847/1538-4357/add874

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