The NANOGrav 15yr Data Set: Search for Signals from New Physics

dc.creatorAfzal, Adeela
dc.creatorAgazie, Gabriella
dc.creatorAnumarlapudi, Akash
dc.creatorArchibald, Anne M.
dc.creatorArzoumanian, Zaven
dc.creatorBaker, Paul T.
dc.creatorBécsy, Bence
dc.creatorBlanco-Pillado, Jose Juan
dc.creatorBlecha, Laura
dc.creatorBoddy, Kimberly K.
dc.creatorBrazier, Adam
dc.creatorBrook, Paul R.
dc.creatorBurke-Spolaor, Sarah
dc.creatorBurnette, Rand
dc.creatorCase, Robin
dc.creatorCharisi, Maria
dc.creatorChatterjee, Shami
dc.creatorChatziioannou, Katerina
dc.creatorCheeseboro, Belinda D.
dc.creatorChen, Siyuan
dc.creatorCohen, Tyler
dc.creatorCordes, James M.
dc.creatorCornish, Neil J.
dc.creatorCrawford, Fronefield
dc.creatorCromartie, H. Thankful
dc.creatorCrowter, Kathryn
dc.creatorCutler, Curt J.
dc.creatorDeCesar, Megan E.
dc.creatorDeGan, Dallas
dc.creatorDemorest, Paul B.
dc.creatorDeng, Heling
dc.creatorDolch, Timothy
dc.creatorDrachler, Brendan
dc.creatorvon Eckardstein, Richard
dc.creatorFerrara, Elizabeth C.
dc.creatorFiore, William
dc.creatorFonseca, Emmanuel
dc.creatorFreedman, Gabriel E.
dc.creatorGarver-Daniels, Nate
dc.creatorGentile, Peter A.
dc.creatorGersbach, Kyle A.
dc.creatorGlaser, Joseph
dc.creatorGood, Deborah C.
dc.creatorGuertin, Lydia
dc.creatorGültekin, Kayhan
dc.creatorHazboun, Jeffrey S.
dc.creatorHourihane, Sophie
dc.creatorIslo, Kristina
dc.creatorJennings, Ross J.
dc.creatorJohnson, Aaron D.
dc.creatorJones, Megan L.
dc.creatorKaiser, Andrew R.
dc.creatorKelley, Luke Zoltan
dc.creatorKerr, Matthew
dc.creatorKey, Joey S.
dc.creatorLaal, Nima
dc.creatorLam, Michael T.
dc.creatorKaplan, David L.
dc.creatorLazio, Joseph T.W.
dc.creatorLee, Vincent S.H.
dc.creatorLewandowska, Natalia
dc.creatorLino dos Santos, Rafael R.
dc.creatorLittenberg, Tyson B.
dc.creatorLamb, William G.
dc.creatorLiu, Tingting
dc.creatorLorimer, Duncan R.
dc.creatorLuo, Jing
dc.creatorLynch, Ryan S.
dc.creatorMa, Chung Pei
dc.creatorMcEwen, Alexander
dc.creatorMcKee, James W.
dc.creatorMadison, Dustin R.
dc.creatorMcLaughlin, Maura A.
dc.creatorMcMann, Natasha
dc.creatorMeyers, Bradley W.
dc.creatorMeyers, Patrick M.
dc.creatorMingarelli, Chiara M.F.
dc.creatorMitridate, Andrea
dc.creatorNay, Jonathan
dc.creatorNatarajan, Priyamvada
dc.creatorNg, Cherry
dc.creatorNice, David J.
dc.creatorOcker, Stella Koch
dc.creatorOlum, Ken D.
dc.creatorPennucci, Timothy T.
dc.creatorPerera, Benetge B.P.
dc.creatorPetrov, Polina
dc.creatorPol, Nihan S.
dc.creatorRadovan, Henri A.
dc.creatorRansom, Scott M.
dc.creatorRay, Paul S.
dc.creatorRomano, Joseph D. (TTU)
dc.creatorSardesai, Shashwat C.
dc.creatorSchmiedekamp, Ann
dc.creatorSchmiedekamp, Carl
dc.creatorSchmitz, Kai
dc.creatorSchröder, Tobias
dc.creatorSchult, Levi
dc.creatorShapiro-Albert, Brent J.
dc.creatorSiemens, Xavier
dc.creatorSimon, Joseph
dc.creatorSiwek, Magdalena S.
dc.creatorStairs, Ingrid H.
dc.creatorStinebring, Daniel R.
dc.creatorStovall, Kevin
dc.creatorStratmann, Peter
dc.creatorSun, Jerry P.
dc.creatorSusobhanan, Abhimanyu
dc.creatorSwiggum, Joseph K.
dc.creatorTaylor, Jacob
dc.creatorTaylor, Stephen R.
dc.creatorTrickle, Tanner
dc.creatorTurner, Jacob E.
dc.creatorVallisneri, Michele
dc.creatorUnal, Caner
dc.creatorVerma, Sonali
dc.creatorVigeland, Sarah J.
dc.creatorWahl, Haley M.
dc.creatorWang, Qiaohong
dc.creatorWitt, Caitlin A.
dc.creatorWright, David
dc.creatorYoung, Olivia
dc.creatorZurek, Kathryn M.
dc.date.accessioned2023-08-16T14:38:16Z
dc.date.available2023-08-16T14:38:16Z
dc.date.issued2023
dc.description© 2023. The Author(s). Published by the American Astronomical Society. cc-by
dc.description.abstractThe 15 yr pulsar timing data set collected by the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) shows positive evidence for the presence of a low-frequency gravitational-wave (GW) background. In this paper, we investigate potential cosmological interpretations of this signal, specifically cosmic inflation, scalar-induced GWs, first-order phase transitions, cosmic strings, and domain walls. We find that, with the exception of stable cosmic strings of field theory origin, all these models can reproduce the observed signal. When compared to the standard interpretation in terms of inspiraling supermassive black hole binaries (SMBHBs), many cosmological models seem to provide a better fit resulting in Bayes factors in the range from 10 to 100. However, these results strongly depend on modeling assumptions about the cosmic SMBHB population and, at this stage, should not be regarded as evidence for new physics. Furthermore, we identify excluded parameter regions where the predicted GW signal from cosmological sources significantly exceeds the NANOGrav signal. These parameter constraints are independent of the origin of the NANOGrav signal and illustrate how pulsar timing data provide a new way to constrain the parameter space of these models. Finally, we search for deterministic signals produced by models of ultralight dark matter (ULDM) and dark matter substructures in the Milky Way. We find no evidence for either of these signals and thus report updated constraints on these models. In the case of ULDM, these constraints outperform torsion balance and atomic clock constraints for ULDM coupled to electrons, muons, or gluons.
dc.identifier.citationAfzal, A., Agazie, G., Anumarlapudi, A., Archibald, A.M., Arzoumanian, Z., Baker, P.T., Becsy, B., Blanco-Pillado, J.J., Blecha, L., Boddy, K.K., Brazier, A., Brook, P.R., Burke-Spolaor, S., Burnette, R., Case, R., Charisi, M., Chatterjee, S., Chatziioannou, K., Cheeseboro, B.D., . . . Zurek, K.M.. 2023. The NANOGrav 15yr Data Set: Search for Signals from New Physics. Astrophysical Journal Letters, 951(1). https://doi.org/10.3847/2041-8213/acdc91
dc.identifier.urihttps://doi.org/10.3847/2041-8213/acdc91
dc.identifier.urihttps://hdl.handle.net/2346/95607
dc.language.isoeng
dc.titleThe NANOGrav 15yr Data Set: Search for Signals from New Physics
dc.typeArticle

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