A Search for QPOs in the Blazar OJ287: Preliminary Results from the 2015/2016 Observing Campaign
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Tarih
2016
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Mdpi Ag
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
We analyse the light curve in the R band of the blazar OJ287, gathered during the 2015/2016 observing season. We did a search for quasi-periodic oscillations (QPOs) using several methods over a wide range of timescales. No statistically significant periods were found in the high-frequency domain both in the ground-based data and in Kepler observations. In the longer-period domain, the Lomb-Scargle periodogram revealed several peaks above the 99% significance level. The longest one-about 95 days-corresponds to the innermost stable circular orbit (ISCO) period of the more massive black hole. The 43-day period could be an alias, or it can be attributed to accretion in the form of a two-armed spiral wave.
Açıklama
Anahtar Kelimeler
galaxies: active, BL Lacertae objects: individual (OJ287), supermassive black holes
Kaynak
Galaxies
WoS Q Değeri
N/A
Scopus Q Değeri
Q2
Cilt
4
Sayı
4
