| Issue |
A&A
Volume 710, June 2026
|
|
|---|---|---|
| Article Number | A24 | |
| Number of page(s) | 7 | |
| Section | Extragalactic astronomy | |
| DOI | https://doi.org/10.1051/0004-6361/202659145 | |
| Published online | 28 May 2026 | |
The faint voice of a radio-weak BL Lacertae: modeling the broadband emission of WISE J141046.00+740511.2
1
Instituto de Investigaciones Físicas de Mar del Plata (IFIMAR), CONICET-UNMdP, Funes 3350 (7600), Mar del Plata, Argentina
2
Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Funes 3350 (7600), Mar del Plata, Argentina
3
Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Paseo del Bosque, B1900FWA, La Plata, Argentina
4
Instituto Argentino de Radioastronomía, CONICET-CICPBA-UNLP, CC5 (1894) Villa Elisa, Prov. de Buenos Aires, Argentina
5
INAF – Osservatorio di Astrofisica e Scienza dello Spazio, Via Gobetti 93/3, 40129 Bologna, Italy
★ Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
26
January
2026
Accepted:
20
April
2026
Abstract
Context. The WISE source, J141046.00+740511.2, has been recently observed from radio to γ rays. Although the optical spectrum is consistent with a BL Lacertae (BL Lac) object, the source displays unusually weak radio emission, which challenges standard interpretations.
Aims. Our aim is to understand the origin of the broadband emission from J141046.00+740511.2, using a leptonic model of an extended jet.
Methods. To obtain the distribution of electrons along the conical jet, we solved a steady-state convective transport equation. Emissivities were computed along the jet and integrated over the cone volume to obtain the observed flux.
Results. Our model successfully reproduces the observed multiwavelength spectral energy distribution from radio to γ rays and naturally accounts for the source’s low radio flux without invoking extra emission zones. We also reproduce the mid-IR emission within the same framework.
Conclusions. These results demonstrate that extended jet leptonic models can robustly describe the broadband physics of radio-weak BL Lacs.
Key words: radiation mechanisms: non-thermal / BL Lacertae objects: general / gamma rays: galaxies / radio continuum: galaxies / X-rays: galaxies
© The Authors 2026
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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