Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Quasi-periodic behaviour in the optical and γ-ray light curves of blazars 3C 66A and B2 1633+38. / Otero-Santos, J.; Acosta-Pulido, J. A.; Becerra González, J.; Raiteri, C. M.; Larionov, V. M.; Peñil, P.; Smith, P. S.; Ballester Niebla, C.; Borman, G.A.; Carnerero, M. I.; Castro Segura, N.; Grishina, T. S.; Kopatskaya, E. N.; Larionova, E. G.; Morozova, D. A.; Nikiforova, A. A.; Savchenko, S. S.; Troitskaya, Yu. V.; Troitsky, I.S.; Vasilyev, A. A.; Villata, M.
в: Monthly Notices of the Royal Astronomical Society, Том 492, № 4, 03.2020, стр. 5524-5539.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Quasi-periodic behaviour in the optical and γ-ray light curves of blazars 3C 66A and B2 1633+38
AU - Otero-Santos, J.
AU - Acosta-Pulido, J. A.
AU - Becerra González, J.
AU - Raiteri, C. M.
AU - Larionov, V. M.
AU - Peñil, P.
AU - Smith, P. S.
AU - Ballester Niebla, C.
AU - Borman, G.A.
AU - Carnerero, M. I.
AU - Castro Segura, N.
AU - Grishina, T. S.
AU - Kopatskaya, E. N.
AU - Larionova, E. G.
AU - Morozova, D. A.
AU - Nikiforova, A. A.
AU - Savchenko, S. S.
AU - Troitskaya, Yu. V.
AU - Troitsky, I.S.
AU - Vasilyev, A. A.
AU - Villata, M.
PY - 2020/3
Y1 - 2020/3
N2 - We report on quasi-periodic variability found in two blazars included in the Steward Observatory Blazar Monitoring data sample: the BL Lac object 3C 66A and the Flat Spectrum Radio Quasar B2 1633+38. We collect optical photometric and polarimetric data in V and R bands of these sources from different observatories: St. Petersburg University, Crimean Astrophysical Observatory, WEBT-GASP, Catalina Real-Time Transient Survey, Steward Observatory, STELLA Robotic Observatory, and Katzman Automatic Imaging Telescope. In addition, an analysis of the γ-ray light curves from Fermi-LAT is included. Three methods are used to search for any periodic behaviour in the data: the Z-transform Discrete Correlation Function, the Lomb-Scargle periodogram and the Weighted Wavelet Z-transform. We find pieces of evidence of possible quasi-periodic variability in the optical photometric data of both sources with periods of ˜3 yr for 3C 66A and ˜1.9 yr for B2 1633+38, with significances between 3σ and 5σ. Only B2 1633+38 shows evidence of this behaviour in the optical polarized data set at a confidence level of 2σ-4σ. This is the first reported evidence of quasi-periodic behaviour in the optical light curve of B2 1633+38. Also, a hint of quasi-periodic behaviour is found in the γ-ray light curve of B2 1633+38 with a confidence level ≥2σ, while no periodicity is observed for 3C 66A in this energy range. We propose different jet emission models that could explain the quasi-periodic variability and the differences found between these two sources.
AB - We report on quasi-periodic variability found in two blazars included in the Steward Observatory Blazar Monitoring data sample: the BL Lac object 3C 66A and the Flat Spectrum Radio Quasar B2 1633+38. We collect optical photometric and polarimetric data in V and R bands of these sources from different observatories: St. Petersburg University, Crimean Astrophysical Observatory, WEBT-GASP, Catalina Real-Time Transient Survey, Steward Observatory, STELLA Robotic Observatory, and Katzman Automatic Imaging Telescope. In addition, an analysis of the γ-ray light curves from Fermi-LAT is included. Three methods are used to search for any periodic behaviour in the data: the Z-transform Discrete Correlation Function, the Lomb-Scargle periodogram and the Weighted Wavelet Z-transform. We find pieces of evidence of possible quasi-periodic variability in the optical photometric data of both sources with periods of ˜3 yr for 3C 66A and ˜1.9 yr for B2 1633+38, with significances between 3σ and 5σ. Only B2 1633+38 shows evidence of this behaviour in the optical polarized data set at a confidence level of 2σ-4σ. This is the first reported evidence of quasi-periodic behaviour in the optical light curve of B2 1633+38. Also, a hint of quasi-periodic behaviour is found in the γ-ray light curve of B2 1633+38 with a confidence level ≥2σ, while no periodicity is observed for 3C 66A in this energy range. We propose different jet emission models that could explain the quasi-periodic variability and the differences found between these two sources.
KW - galaxies: active
KW - BL Lacertae objects: general
KW - BL Lacertae objects: individual (3C 66A
KW - B2 1633+38)
KW - galaxies: nuclei
KW - HELICAL JETS
KW - TELESCOPE
KW - SPECTRAL VARIABILITY
KW - RADIO OUTBURSTS
KW - LONG-TERM VARIABILITY
KW - BL LACERTAE
KW - BLACK-HOLE BINARY
KW - INTRADAY VARIABILITY
KW - ACCRETION
KW - BL Lacertae objects: individual (3C 66A, B2 1633+38)
KW - RELATIVISTIC MAGNETOHYDRODYNAMIC SIMULATIONS
UR - http://www.mendeley.com/catalogue/quasiperiodic-behaviour-optical-%CE%B3ray-light-curves-blazars-3c-66a-b2-163338
U2 - 10.1093/mnras/staa134
DO - 10.1093/mnras/staa134
M3 - Article
VL - 492
SP - 5524
EP - 5539
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 4
ER -
ID: 51735136