A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
ANOMALOUS FLARE ACTIVITY OF THE BLASAR 3C 454.3 DURING 2005-2011
Tekijät: A. E. Vol’vach, A. M. Kut’kin, L. N. Vol’vach, M. G. Larionov, A. Lähteenmäki, M. Tornikoski, E. Nieppola, P. Savolainen, J. Tammi, M. F. Aller, H. D. Aller
Kustantaja: SPRINGER/PLENUM PUBLISHERS
Julkaisuvuosi: 2011
Lehti: Astrophysics
Tietokannassa oleva lehden nimi: ASTROPHYSICS
Lehden akronyymi: ASTROPHYSICS+
Vuosikerta: 54
Numero: 3
Aloitussivu: 363
Lopetussivu: 370
Sivujen määrä: 8
ISSN: 0571-7256
eISSN: 1573-8191
DOI: https://doi.org/10.1007/s10511-011-9185-6
Tiivistelmä
Anomalous flare phenomena observed in the blasar 3C 454.3 during 2005-2011 are analyzed. The activity is studied over a wide range of wavelengths, from the radio to the gamma range. Strong gamma flares in this object are accompanied by a significant rise in the level of emission at other wavelengths with delays depending on the frequency at which the observations are made. An expression is obtained for the delay in the appearance of flares as a function of observation frequency that has an inverse logarithmic dependence and is satisfied for three flares in 3C 454.3 over the last six years. The general pattern of the development of these flares indicates that the most powerful ongoing flare may extend even into the second half of 2011. A model of flare phenomena in terms of a binary system of supermassive black holes shows that the angle between the plane of the orbit and the accretion disk decreases owing to precessional motions in the 3C 454.3 system, so that the companion remains in the accretion disk of the central supermassive black hole for a long time and sets up the characteristic form of the next flare.
Anomalous flare phenomena observed in the blasar 3C 454.3 during 2005-2011 are analyzed. The activity is studied over a wide range of wavelengths, from the radio to the gamma range. Strong gamma flares in this object are accompanied by a significant rise in the level of emission at other wavelengths with delays depending on the frequency at which the observations are made. An expression is obtained for the delay in the appearance of flares as a function of observation frequency that has an inverse logarithmic dependence and is satisfied for three flares in 3C 454.3 over the last six years. The general pattern of the development of these flares indicates that the most powerful ongoing flare may extend even into the second half of 2011. A model of flare phenomena in terms of a binary system of supermassive black holes shows that the angle between the plane of the orbit and the accretion disk decreases owing to precessional motions in the 3C 454.3 system, so that the companion remains in the accretion disk of the central supermassive black hole for a long time and sets up the characteristic form of the next flare.
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