BibTex format
@article{Afzal:2023:2041-8213/acdc91,
author = {Afzal, A and Agazie, G and Anumarlapudi, A and Archibald, AM and Arzoumanian, Z and Baker, PT and Bécsy, B and Blanco-Pillado, JJ and Blecha, L and Boddy, KK and Brazier, A and Brook, PR and Burke-Spolaor, S and Burnette, R and Case, R and Charisi, M and Chatterjee, S and Chatziioannou, K and Cheeseboro, BD and Chen, S and Cohen, T and Cordes, JM and Cornish, NJ and Crawford, F and Cromartie, HT and Crowter, K and Cutler, CJ and DeCesar, ME and DeGan, D and Demorest, PB and Deng, H and Dolch, T and Drachler, B and von, Eckardstein R and Ferrara, EC and Fiore, W and Fonseca, E and Freedman, GE and Garver-Daniels, N and Gentile, PA and Gersbach, KA and Glaser, J and Good, DC and Guertin, L and Gültekin, K and Hazboun, JS and Hourihane, S and Islo, K and Jennings, RJ and Johnson, AD and Jones, ML and Kaiser, AR and Kelley, LZ and Kerr, M and Key, JS and Laal, N and Lam, MT and Kaplan, DL and Lazio, JTW and Lee, VSH and Lewandowska, N and Lino, dos Santos RR and Littenberg, TB and Lamb, WG},
doi = {2041-8213/acdc91},
journal = {Astrophysical Journal Letters},
title = {The NANOGrav 15yr Data Set: Search for Signals from New Physics},
url = {http://dx.doi.org/10.3847/2041-8213/acdc91},
volume = {951},
year = {2023}
}
RIS format (EndNote, RefMan)
TY - JOUR
AB - The 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.
AU - Afzal,A
AU - Agazie,G
AU - Anumarlapudi,A
AU - Archibald,AM
AU - Arzoumanian,Z
AU - Baker,PT
AU - Bécsy,B
AU - Blanco-Pillado,JJ
AU - Blecha,L
AU - Boddy,KK
AU - Brazier,A
AU - Brook,PR
AU - Burke-Spolaor,S
AU - Burnette,R
AU - Case,R
AU - Charisi,M
AU - Chatterjee,S
AU - Chatziioannou,K
AU - Cheeseboro,BD
AU - Chen,S
AU - Cohen,T
AU - Cordes,JM
AU - Cornish,NJ
AU - Crawford,F
AU - Cromartie,HT
AU - Crowter,K
AU - Cutler,CJ
AU - DeCesar,ME
AU - DeGan,D
AU - Demorest,PB
AU - Deng,H
AU - Dolch,T
AU - Drachler,B
AU - von,Eckardstein R
AU - Ferrara,EC
AU - Fiore,W
AU - Fonseca,E
AU - Freedman,GE
AU - Garver-Daniels,N
AU - Gentile,PA
AU - Gersbach,KA
AU - Glaser,J
AU - Good,DC
AU - Guertin,L
AU - Gültekin,K
AU - Hazboun,JS
AU - Hourihane,S
AU - Islo,K
AU - Jennings,RJ
AU - Johnson,AD
AU - Jones,ML
AU - Kaiser,AR
AU - Kelley,LZ
AU - Kerr,M
AU - Key,JS
AU - Laal,N
AU - Lam,MT
AU - Kaplan,DL
AU - Lazio,JTW
AU - Lee,VSH
AU - Lewandowska,N
AU - Lino,dos Santos RR
AU - Littenberg,TB
AU - Lamb,WG
AU - Liu,T
AU - Lorimer,DR
AU - Luo,J
AU - Lynch,RS
AU - Ma,CP
AU - McEwen,A
AU - McKee,JW
AU - Madison,DR
AU - McLaughlin,MA
AU - McMann,N
AU - Meyers,BW
AU - Meyers,PM
AU - Mingarelli,CMF
AU - Mitridate,A
AU - Nay,J
AU - Natarajan,P
AU - Ng,C
AU - Nice,DJ
AU - Ocker,SK
AU - Olum,KD
AU - Pennucci,TT
AU - Perera,BBP
AU - Petrov,P
AU - Pol,NS
AU - Radovan,HA
AU - Ransom,SM
AU - Ray,PS
AU - Romano,JD
AU - Sardesai,SC
AU - Schmiedekamp,A
AU - Schmiedekamp,C
AU - Schmitz,K
AU - Schröder,T
AU - Schult,L
AU - Shapiro-Albert,BJ
AU - Siemens,X
DO - 2041-8213/acdc91
PY - 2023///
SN - 2041-8205
TI - The NANOGrav 15yr Data Set: Search for Signals from New Physics
T2 - Astrophysical Journal Letters
UR - http://dx.doi.org/10.3847/2041-8213/acdc91
VL - 951
ER -