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Quasi-Periodicities at Year Time Scales in Blazars

Published online by Cambridge University Press:  23 June 2017

Stefano Covino Open the ORCID record for Stefano Covino [Opens in a new window] ,
Angela Sandrinelli  and
Aldo Treves
Stefano Covino
Affiliation:
INAF/Brera Astronomical Observatory, via Bianchi 46, 23897, Merate (LC), Italy
Angela Sandrinelli
Affiliation:
INAF/Brera Astronomical Observatory, via Bianchi 46, 23897, Merate (LC), Italy Università degli Studi dell’Insubria, Via Valleggio 11, 22100 Como, Italy
Aldo Treves
Affiliation:
Università degli Studi dell’Insubria, Via Valleggio 11, 22100 Como, Italy
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Abstract

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We examine the 2008-2016 gamma-ray and optical light curves of a number of bright Fermi blazars. In a fraction of them, the periodograms show possible evidence of quasi-periodicities related in the two bands. This coincidence strengthens their physical meaning. Comparing with results from the periodicity search of quasars, the presence of quasi-periodicities in blazars suggests that the basic condition for its observability is related to the relativistic jet in the observer direction, but the overall picture remains uncertain.

Keywords

BL Lacertae objects: generalmethods: statistical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S324: New Frontiers in Black Hole Astrophysics , September 2016 , pp. 180 - 183
Copyright
Copyright © International Astronomical Union 2017 

References

Abdo, A. A., Ackermann, M., Ajello, M., et al. 2010, ApJ, 722, 520 CrossRefGoogle Scholar
Ackermann, M., Ajello, M., Albert, A., et al. 2015, ApJ, 813, 41 Google Scholar
Charisi, M., Bartos, I., Haiman, Z., et al. 2016, MNRAS, 463, 2145 CrossRefGoogle Scholar
Covino, S., Stefanon, M., Sciuto, G., et al. 2004, SPIE, 5492, 1613 Google Scholar
Falomo, R., Pian, E., & Treves, A. 2014, ARAA, 22, 73 Google Scholar
Frescura, F. A. M., Engelbrecht, C. A., & Frank, B. S. 2008, MNRAS, 388, 1693 Google Scholar
Horne, J. H. & Baliunas, S. L. 1986, ApJ, 302, 757 CrossRefGoogle Scholar
Hudec, R., Bašta, M., Pihajoki, P., & Valtonen, M. 2013, A&A, 559, A20 Google Scholar
Sandrinelli, A., Covino, S., & Treves, A. 2014a, A&A, 562, 79 Google Scholar
Sandrinelli, A., Covino, S., & Treves, A. 2014b, ApJ, 793, 1 CrossRefGoogle Scholar
Sandrinelli, A., Covino, S., & Treves, A. 2016a, AJ, 151, 54 Google Scholar
Sandrinelli, A., Covino, S., & Treves, A. 2016b, ApJ, 820, 20 CrossRefGoogle Scholar
Sandrinelli, A., Covino, S., Treves, A., et al. 2017, A&A, in press (arXiv:1701.04454)Google Scholar
Sillanpää, A., Haarala, S., Valtonen, M. J., Sundelius, B., & Byrd, G. G. 1988, ApJ, 325, 628 Google Scholar
Süveges, M. 2014, MNRAS, 440, 2099 Google Scholar
Süveges, M., Guy, L. P., Eyer, L., et al. 2015, MNRAS, 450, 2052 Google Scholar
Vaughan, S. 2005, A&A, 431, 391 Google Scholar
Vaughan, S. 2010, MNRAS, 402, 307 CrossRefGoogle Scholar
Zerbi, F. M., Chincarini, G., Ghisellini, G., et al. 2004, SPIE, 5492, 1590 Google Scholar