Multi-epoch leptohadronic modeling of neutrino source candidate blazar PKS 0735+178

A. Omeliukh; S. Garrappa; V. Fallah Ramazani; A. Franckowiak; W. Winter; E. Lindfors; K. Nilsson; J. Jormanainen; F. Wierda; A. V. Filippenko; W. Zheng; M. Tornikoski; A. Lahteenmaki; S. Kankkunen; J. Tammi

doi:10.1051/0004-6361/202452143

Multi-epoch leptohadronic modeling of neutrino source candidate blazar PKS 0735+178

A. Omeliukh
, S. Garrappa
, V. Fallah Ramazani
, A. Franckowiak
, W. Winter
, E. Lindfors
, K. Nilsson
, J. Jormanainen
, F. Wierda
, A. V. Filippenko
, W. Zheng
, M. Tornikoski
, A. Lahteenmaki
, S. Kankkunen
, J. Tammi

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

4 Citations (Scopus)

19 Downloads (Pure)

Abstract

Context. The origin of the astrophysical neutrino flux discovered by IceCube remains largely unknown. Several individual neutrino source candidates were observed. Among them is the gamma-ray flaring blazar TXS 0506+056. A similar coincidence of a high-energy neutrino and a gamma-ray flare was found in blazar PKS 0735+178.

Aims. By modeling the spectral energy distributions of PKS 0735+178, we aimed to explore the physical conditions that lead to neutrino production at different stages of the source's activity.

Methods. We analyzed the multiwavelength data from the selected time periods. Using numerical simulations of radiation processes in the source, we explored the parameter space of one-zone leptonic and leptohadronic models to find the best-fit solutions that explain the observed photon fluxes.

Results. We demonstrated how model parameter degeneracy affected the prediction of neutrino spectra. We showed that the available multiwavelength data were insufficient to predict the neutrino spectrum unambiguously. However, under the condition of neutrino rates maximization, we proposed a scenario in which 0.1 neutrino events were produced during the 50-day flare.

Original language	English
Article number	A266
Pages (from-to)	1-15
Number of pages	15
Journal	Astronomy & Astrophysics
Volume	695
DOIs	https://doi.org/10.1051/0004-6361/202452143
Publication status	Published - 27 Mar 2025
MoE publication type	A1 Journal article-refereed

Funding

A.O. was supported by DAAD funding program 57552340. A.F. acknowledges support from the DFG via the Collaborative Research Center SFB1491 Cosmic Interacting Matters – From Source to Signal. A.V.F.'s research group at UC Berkeley acknowledges financial assistance from the Christopher R. Redlich Fund, Gary and Cynthia Bengier, Clark and Sharon Winslow, Alan Eustace (W.Z. is a Bengier-Winslow-Eustace Specialist in Astronomy), and numerous other donors. KAIT and its ongoing operation were made possible by donations from Sun Microsystems, Inc., the Hewlett-Packard Company, AutoScope Corporation, Lick Observatory, the U.S. National Science Foundation, the University of California, the Sylvia & Jim Katzman Foundation, and the TABASGO Foundation. Research at Lick Observatory is partially supported by a generous gift from Google.

Keywords

BL Lacertae objects: individual: PKS 0735+178
Methods: numerical
Neutrinos
Radiation mechanisms: non-thermal

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Multi-epoch_leptohadronic_modeling_of_neutrino_source_candidate_blazar_PKS_0735+178Final published version, 121 bytesLicence: CC BY

Cite this

Omeliukh, A., Garrappa, S., Ramazani, V. F., Franckowiak, A., Winter, W., Lindfors, E., Nilsson, K., Jormanainen, J., Wierda, F., Filippenko, A. V., Zheng, W., Tornikoski, M., Lahteenmaki, A., Kankkunen, S., & Tammi, J. (2025). Multi-epoch leptohadronic modeling of neutrino source candidate blazar PKS 0735+178. Astronomy & Astrophysics, 695, 1-15. Article A266. https://doi.org/10.1051/0004-6361/202452143

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Omeliukh, A, Garrappa, S, Ramazani, VF, Franckowiak, A, Winter, W, Lindfors, E, Nilsson, K, Jormanainen, J, Wierda, F, Filippenko, AV, Zheng, W, Tornikoski, M , Lahteenmaki, A , Kankkunen, S & Tammi, J 2025, 'Multi-epoch leptohadronic modeling of neutrino source candidate blazar PKS 0735+178', Astronomy & Astrophysics, vol. 695, A266, pp. 1-15. https://doi.org/10.1051/0004-6361/202452143

TY - JOUR

T1 - Multi-epoch leptohadronic modeling of neutrino source candidate blazar PKS 0735+178

AU - Omeliukh, A.

AU - Garrappa, S.

AU - Ramazani, V. Fallah

AU - Franckowiak, A.

AU - Winter, W.

AU - Lindfors, E.

AU - Nilsson, K.

AU - Jormanainen, J.

AU - Wierda, F.

AU - Filippenko, A. V.

AU - Zheng, W.

AU - Tornikoski, M.

AU - Lahteenmaki, A.

AU - Kankkunen, S.

AU - Tammi, J.

PY - 2025/3/27

Y1 - 2025/3/27

N2 - Context. The origin of the astrophysical neutrino flux discovered by IceCube remains largely unknown. Several individual neutrino source candidates were observed. Among them is the gamma-ray flaring blazar TXS 0506+056. A similar coincidence of a high-energy neutrino and a gamma-ray flare was found in blazar PKS 0735+178. Aims. By modeling the spectral energy distributions of PKS 0735+178, we aimed to explore the physical conditions that lead to neutrino production at different stages of the source's activity. Methods. We analyzed the multiwavelength data from the selected time periods. Using numerical simulations of radiation processes in the source, we explored the parameter space of one-zone leptonic and leptohadronic models to find the best-fit solutions that explain the observed photon fluxes. Results. We demonstrated how model parameter degeneracy affected the prediction of neutrino spectra. We showed that the available multiwavelength data were insufficient to predict the neutrino spectrum unambiguously. However, under the condition of neutrino rates maximization, we proposed a scenario in which 0.1 neutrino events were produced during the 50-day flare.

AB - Context. The origin of the astrophysical neutrino flux discovered by IceCube remains largely unknown. Several individual neutrino source candidates were observed. Among them is the gamma-ray flaring blazar TXS 0506+056. A similar coincidence of a high-energy neutrino and a gamma-ray flare was found in blazar PKS 0735+178. Aims. By modeling the spectral energy distributions of PKS 0735+178, we aimed to explore the physical conditions that lead to neutrino production at different stages of the source's activity. Methods. We analyzed the multiwavelength data from the selected time periods. Using numerical simulations of radiation processes in the source, we explored the parameter space of one-zone leptonic and leptohadronic models to find the best-fit solutions that explain the observed photon fluxes. Results. We demonstrated how model parameter degeneracy affected the prediction of neutrino spectra. We showed that the available multiwavelength data were insufficient to predict the neutrino spectrum unambiguously. However, under the condition of neutrino rates maximization, we proposed a scenario in which 0.1 neutrino events were produced during the 50-day flare.

KW - BL Lacertae objects: individual: PKS 0735+178

KW - Methods: numerical

KW - Neutrinos

KW - Radiation mechanisms: non-thermal

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JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

M1 - A266

ER -

Multi-epoch leptohadronic modeling of neutrino source candidate blazar PKS 0735+178

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Metsähovi Radio Observatory

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Multi-epoch leptohadronic modeling of neutrino source candidate blazar PKS 0735+178

Abstract

Funding

Keywords

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Other files and links

Fingerprint

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Metsähovi Radio Observatory

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