The IXPE and multifrequency polarimetric view of the extreme blazars 1ES 1101-232 and RGB J0710+591
Multiwavelength polarimetry offers a powerful tool to probe magnetic field and flow geometries in the relativistic jets of blazars. Sources with synchrotron emission that spans a broad frequency range, from radio to X-rays, such as High Synchrotron Peak (HSP) type BL Lac objects, are particularly interesting. Previous measurements including radio, optical, and X-ray data show a clear trend, with the degree of polarization increasing with frequency. Here we report radio, optical, and X-ray observations (Swift, Nustar, and IXPE) of 1ES 1101-232 and RGB J0710+591, two blazars belonging to the puzzling subclass of extreme BL Lacs (EHBL). For 1ES 1101-232, we find a strong frequency dependence of the degree of polarization, with a ratio Π_X/Π_O≃ 5.2. For RGB J0710+591, IXPE derives a 1σ upper limit Π_X<11.6%, comparable to the measured optical degree of polarization (average Π_O∼ 12%). We discuss the results in the framework of current interpretations and, in particular, we report an improved version of the stratified shock model that reproduces the observed data of both sources.
Authors
- Laura Di Gesu (ORCID: https://orcid.org/0000-0002-5614-5028)
- W. Schulga
- P. Benke (ORCID: https://orcid.org/0009-0006-4186-9978)
- Florian Eppel (ORCID: https://orcid.org/0000-0001-7112-9942)
- T. Sbarrato (ORCID: https://orcid.org/0000-0002-3069-9399)
- A. Sota (ORCID: https://orcid.org/0000-0002-9404-6952)
- Ioannis Liodakis (ORCID: https://orcid.org/0000-0001-9200-4006)
- Pouya M. Kouch (ORCID: https://orcid.org/0000-0002-9328-2750)
- E. Angelakis (ORCID: https://orcid.org/0000-0001-7327-5441)
- A. Strigachev
- T. Akai
- Andrea Gokus (ORCID: https://orcid.org/0000-0002-5726-5216)
- F. J. Aceituno (ORCID: https://orcid.org/0000-0001-8074-4760)
- Dana Kirchner
- E. Lindfors (ORCID: https://orcid.org/0000-0002-9155-6199)
- Ryo Imazawa (ORCID: https://orcid.org/0000-0002-0643-7946)
- A. Sciaccaluga (ORCID: https://orcid.org/0000-0001-6181-839X)
- Koji S. Kawabata (ORCID: https://orcid.org/0000-0001-6099-9539)
- Steven Hammerich
- Daniel González Morcuende
- V. Piirola (ORCID: https://orcid.org/0000-0003-0186-206X)
- J. Eich
- F. Rösch
- Tatsuya Nakaoka
- Sumie Tochihara
- Juan Escudero
- Lena Debbrecht
- Alexander Kraus
- Carolina Casadio Víctor Casanova
- Jonas Heß dörfer
- Lucia Ballo
- Georgios Filippos Paraschos
- Tsunefumi Mizuno
- Makoto Uemura
- Giacomo Bonnoli
- Matthias Kadler
- Mahito Sasada
- Paolo Coppi
- Rumen Bachev
- Garrett Keating
- Ramprasad Rao
- Kari Nilsson
- Yasushi Fukazawa
- Giampiero Tagliaferri
- Dawoon E. Kim
- Jorge Otero-Santos
- Mark Gurwell
- Immacolata Donnarumma
- Sanghyun Kim
- Steven R. Ehlert
- Gabriel Emery
- Fabrizio Tavecchio
- Ioannis Myserlis
- Iván Agudo
- Hiroshi Akitaya
Publication Details
- Journal
- Springer Link (Chiba Institute of Technology)
- Published
- 2026-04-02
- DOI
- https://doi.org/10.1051/0004-6361/202558716/pdf
- Primary Topic
- Astrophysics and Cosmic Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.00