The 65 Day Period in 3C 66A during Bright State

Bibcode
1999ApJ...521..561L
DOI
10.1086/307599
Lainela, M.; Takalo, L. O.; Sillanpää, A.; Pursimo, T.; Nilsson, K.; Katajainen, S.; Tosti, G.; Fiorucci, M.; Luciani, M.; Villata, M.; Raiteri, C. M.; de Francesco, G.; Sobrito, G.; Benítez, E.; Dultzin-Hacyan, D.; de Diego, J. A.; Turner, G. W.; Robertson, J. W.; Honeycutt, R. K.
Referencia bibliográfica

The Astrophysical Journal, Volume 521, Issue 2, pp. 561-564.

Fecha de publicación:
8
1999
Revista
The Astrophysical Journal
Número de autores
19
Número de autores del IAC
0
Número de citas
86
Número de citas referidas
76
Descripción
Historically, 3C 66A has been considered a relative quiescent blazar. For that reason, 3C 66A was selected as a comparison source for OJ 287 in the OJ-94 project. However, after more detailed observation it turns out that the variability of 3C 66A itself is very interesting. We have analyzed the entire project data set of 3C 66A from fall of 1993 to spring of 1998 by using structure function analysis, Deeming periodograms, Scargle periodograms, and the folded light curves. Here we present the first preliminary evidence for the 65 day period in 3C 66A observed during the bright state. Our analysis indicates that this period is slowly slowing down. We will also discuss the possible physical mechanism producing the observed periodicity.
Tipo
Con árbitro
Galaxias
Fotometría

Te puede interesar

  • Con árbitro
    Beyond the Nyquist frequency: Asteroseismic catalog of undersampled Kepler late subgiants and early red giants
    Subgiants and early red giants are crucial for studying the first dredge-up, a key evolutionary phase in which the convective envelope deepens, mixing previously interior-processed material and bringing it to the surface. Yet, very few have been seismically characterized with Kepler because their oscillation frequencies are close to the 30 minute
    Liagre, B. et al.

    Fecha de publicación:

    10
    2025
    Bibcode
    2025A&A...702A.144L
    Número de citas
    0
  • Con árbitro
    An ALMA Band 7 survey of SDSS/Herschel quasars in Stripe 82: I. The properties of the 870 micron counterparts
    Context. Over the past 15 years, studies of quasars in the far-infrared (FIR) have reported host luminosities ranging from 10 12 to 10 14 L ⊙. These luminosities, often derived from Herschel/SPIRE photometry, suggest star formation rates (SFRs) of up to several thousand M ⊙ yr ‑1, positioning them among the most luminous starburst galaxies in the
    Hatziminaoglou, E. et al.

    Fecha de publicación:

    10
    2025
    Bibcode
    2025A&A...702A.183H
    Número de citas
    0
  • Con árbitro
    Transit timing variations in HIP 41378: CHEOPS and TESS confirm a non-transiting sixth planet in the system
    In multiple-planet systems, gravitational interactions of exoplanets could lead to transit timing variations (TTVs), whose amplitude becomes significantly enhanced when planets are in or near mean-motion resonances (MMRs), making them more easily detectable. In cases where both TTVs and radial velocity (RV) measurements are available, combined
    Leonardi, P. et al.

    Fecha de publicación:

    10
    2025
    Bibcode
    2025A&A...702A.211L
    Número de citas
    0