Characteristics of the Flare Phenomenon in Blazar AO0235+164 in Gamma, Optical, and Radio Bands

V. S. Bychkova; A. E. Volvach; L. N. Volvach; N. S. Kardashev; M. G. Larionov; V. V. Vlasyuk; O. I. Spiridonova; A. Lähteenmäki; M. Tornikoski; J. Tammi; E. Järvelä; R. J.C. Vera; W. Chamani; S. Enestam

doi:10.1134/S1990341318030033

Characteristics of the Flare Phenomenon in Blazar AO0235+164 in Gamma, Optical, and Radio Bands

V. S. Bychkova, A. E. Volvach^*, L. N. Volvach, N. S. Kardashev, M. G. Larionov, V. V. Vlasyuk, O. I. Spiridonova, A. Lähteenmäki, M. Tornikoski, J. Tammi, E. Järvelä, R. J.C. Vera, W. Chamani, S. Enestam

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

Abstract

The active core of the galaxy AO0235+164 is monitored in the optical and radio bands at millimeter wavelengths. Using the multifrequency data obtained in gamma, optical and radio bands, the characteristics of its radiation in the active phase of 2015–2016 are studied. The cross-correlation method was used to determine the delays of the 2015 flare that took place in AO0235+164 in different bands. The analysis made it possible to establish that, in comparison with the previous flare phenomena, changes in the orientation of the emissions (jets) have occurred. The angle θ between the jets and the direction towards the observer has decreased by a factor of 2, resulting in a twofold increase in the γ-factor. The obtained value γ ≈ 40 is the most extreme value ever observed in AO0235+164 over the entire span of observations.

Original language	English
Pages (from-to)	293-297
Number of pages	5
Journal	Astrophysical Bulletin
Volume	73
Issue number	3
DOIs	https://doi.org/10.1134/S1990341318030033
Publication status	Published - 1 Jul 2018
MoE publication type	A1 Journal article-refereed

Keywords

AO0235+164
BL Lacertae objects
individual

Access to Document

10.1134/S1990341318030033

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Bychkova, V. S., Volvach, A. E., Volvach, L. N., Kardashev, N. S., Larionov, M. G., Vlasyuk, V. V., Spiridonova, O. I., Lähteenmäki, A., Tornikoski, M., Tammi, J., Järvelä, E., Vera, R. J. C., Chamani, W., & Enestam, S. (2018). Characteristics of the Flare Phenomenon in Blazar AO0235+164 in Gamma, Optical, and Radio Bands. Astrophysical Bulletin, 73(3), 293-297. https://doi.org/10.1134/S1990341318030033

Bychkova, V. S. ; Volvach, A. E. ; Volvach, L. N. ; Kardashev, N. S. ; Larionov, M. G. ; Vlasyuk, V. V. ; Spiridonova, O. I. ; Lähteenmäki, A. ; Tornikoski, M. ; Tammi, J. ; Järvelä, E. ; Vera, R. J.C. ; Chamani, W. ; Enestam, S. / Characteristics of the Flare Phenomenon in Blazar AO0235+164 in Gamma, Optical, and Radio Bands. In: Astrophysical Bulletin. 2018 ; Vol. 73, No. 3. pp. 293-297.

@article{d04ee8516ed14f97be77c8afbdbe7ee6,

title = "Characteristics of the Flare Phenomenon in Blazar AO0235+164 in Gamma, Optical, and Radio Bands",

abstract = "The active core of the galaxy AO0235+164 is monitored in the optical and radio bands at millimeter wavelengths. Using the multifrequency data obtained in gamma, optical and radio bands, the characteristics of its radiation in the active phase of 2015–2016 are studied. The cross-correlation method was used to determine the delays of the 2015 flare that took place in AO0235+164 in different bands. The analysis made it possible to establish that, in comparison with the previous flare phenomena, changes in the orientation of the emissions (jets) have occurred. The angle θ between the jets and the direction towards the observer has decreased by a factor of 2, resulting in a twofold increase in the γ-factor. The obtained value γ ≈ 40 is the most extreme value ever observed in AO0235+164 over the entire span of observations.",

keywords = "AO0235+164, BL Lacertae objects, individual",

author = "Bychkova, {V. S.} and Volvach, {A. E.} and Volvach, {L. N.} and Kardashev, {N. S.} and Larionov, {M. G.} and Vlasyuk, {V. V.} and Spiridonova, {O. I.} and A. L{\"a}hteenm{\"a}ki and M. Tornikoski and J. Tammi and E. J{\"a}rvel{\"a} and Vera, {R. J.C.} and W. Chamani and S. Enestam",

year = "2018",

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day = "1",

doi = "10.1134/S1990341318030033",

language = "English",

volume = "73",

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Bychkova, VS, Volvach, AE, Volvach, LN, Kardashev, NS, Larionov, MG, Vlasyuk, VV, Spiridonova, OI, Lähteenmäki, A , Tornikoski, M , Tammi, J , Järvelä, E , Vera, RJC , Chamani, W & Enestam, S 2018, 'Characteristics of the Flare Phenomenon in Blazar AO0235+164 in Gamma, Optical, and Radio Bands', Astrophysical Bulletin, vol. 73, no. 3, pp. 293-297. https://doi.org/10.1134/S1990341318030033

Characteristics of the Flare Phenomenon in Blazar AO0235+164 in Gamma, Optical, and Radio Bands. / Bychkova, V. S.; Volvach, A. E.; Volvach, L. N.; Kardashev, N. S.; Larionov, M. G.; Vlasyuk, V. V.; Spiridonova, O. I.; Lähteenmäki, A.; Tornikoski, M.; Tammi, J.; Järvelä, E.; Vera, R. J.C.; Chamani, W.; Enestam, S.

In: Astrophysical Bulletin, Vol. 73, No. 3, 01.07.2018, p. 293-297.

Research output: Contribution to journal › Article › Scientific › peer-review

TY - JOUR

T1 - Characteristics of the Flare Phenomenon in Blazar AO0235+164 in Gamma, Optical, and Radio Bands

AU - Bychkova, V. S.

AU - Volvach, A. E.

AU - Volvach, L. N.

AU - Kardashev, N. S.

AU - Larionov, M. G.

AU - Vlasyuk, V. V.

AU - Spiridonova, O. I.

AU - Lähteenmäki, A.

AU - Tornikoski, M.

AU - Tammi, J.

AU - Järvelä, E.

AU - Vera, R. J.C.

AU - Chamani, W.

AU - Enestam, S.

PY - 2018/7/1

Y1 - 2018/7/1

N2 - The active core of the galaxy AO0235+164 is monitored in the optical and radio bands at millimeter wavelengths. Using the multifrequency data obtained in gamma, optical and radio bands, the characteristics of its radiation in the active phase of 2015–2016 are studied. The cross-correlation method was used to determine the delays of the 2015 flare that took place in AO0235+164 in different bands. The analysis made it possible to establish that, in comparison with the previous flare phenomena, changes in the orientation of the emissions (jets) have occurred. The angle θ between the jets and the direction towards the observer has decreased by a factor of 2, resulting in a twofold increase in the γ-factor. The obtained value γ ≈ 40 is the most extreme value ever observed in AO0235+164 over the entire span of observations.

AB - The active core of the galaxy AO0235+164 is monitored in the optical and radio bands at millimeter wavelengths. Using the multifrequency data obtained in gamma, optical and radio bands, the characteristics of its radiation in the active phase of 2015–2016 are studied. The cross-correlation method was used to determine the delays of the 2015 flare that took place in AO0235+164 in different bands. The analysis made it possible to establish that, in comparison with the previous flare phenomena, changes in the orientation of the emissions (jets) have occurred. The angle θ between the jets and the direction towards the observer has decreased by a factor of 2, resulting in a twofold increase in the γ-factor. The obtained value γ ≈ 40 is the most extreme value ever observed in AO0235+164 over the entire span of observations.

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