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

Agazie G., Anumarlapudi A., Archibald A. M., Arzoumanian Z., Baier J. G., Baker P. T., ...Daha Fazla

Astrophysical Journal, cilt.987, sa.1, 2025 (SCI-Expanded, Scopus) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 987 Sayı: 1
  • Basım Tarihi: 2025
  • Doi Numarası: 10.3847/1538-4357/add874
  • Dergi Adı: Astrophysical Journal
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, INSPEC, zbMATH, Directory of Open Access Journals, DIALNET
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

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.