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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2512.19193 |
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| _version_ | 1866908908086362112 |
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| author | Tavecchio, Fabrizio Kim, Dawoon E. Emery, Gabriel Liodakis, Ioannis Agudo, Iván Coppi, Paolo Tagliaferri, Giampiero Di Gesu, Laura Sbarrato, Tullia Ballo, Lucia Sciaccaluga, Alberto Ehlert, Steven R. Bonnoli, Giacomo Aceituno, Francisco José Casadio, Carolina Casanova, Víctor Donnarumma, Immacolata Escudero, Juan Morcuende, Daniel Otero-Santos, Jorge Sota, Alfredo Piirola, Vilppu Kouch, Pouya M. Lindfors, Elina Nilsson, Kari Myserlis, Ioannis Gurwell, Mark Keating, Garrett Rao, Ramprasad Angelakis, Emmanouil Kraus, Alexander Imazawa, Ryo Sasada, Mahito Fukazawa, Yasushi Kawabata, Koji S. Uemura, Makoto Mizuno, Tsunefumi Nakaoka, Tatsuya Tochihara, Sumie Akai, Takahiro Akitaya, Hiroshi Bachev, Rumen Strigachev, Anton Benke, Petra Debbrecht, Lena Eich, Julia Eppel, Florian Gokus, Andrea Hämmerich, Steven Heßdörfer, Jonas Kadler, Matthias Kim, Sanghyun Kirchner, Dana Paraschos, Georgios Filippos Rösch, Florian Schulga, Wladislaw |
| author_facet | Tavecchio, Fabrizio Kim, Dawoon E. Emery, Gabriel Liodakis, Ioannis Agudo, Iván Coppi, Paolo Tagliaferri, Giampiero Di Gesu, Laura Sbarrato, Tullia Ballo, Lucia Sciaccaluga, Alberto Ehlert, Steven R. Bonnoli, Giacomo Aceituno, Francisco José Casadio, Carolina Casanova, Víctor Donnarumma, Immacolata Escudero, Juan Morcuende, Daniel Otero-Santos, Jorge Sota, Alfredo Piirola, Vilppu Kouch, Pouya M. Lindfors, Elina Nilsson, Kari Myserlis, Ioannis Gurwell, Mark Keating, Garrett Rao, Ramprasad Angelakis, Emmanouil Kraus, Alexander Imazawa, Ryo Sasada, Mahito Fukazawa, Yasushi Kawabata, Koji S. Uemura, Makoto Mizuno, Tsunefumi Nakaoka, Tatsuya Tochihara, Sumie Akai, Takahiro Akitaya, Hiroshi Bachev, Rumen Strigachev, Anton Benke, Petra Debbrecht, Lena Eich, Julia Eppel, Florian Gokus, Andrea Hämmerich, Steven Heßdörfer, Jonas Kadler, Matthias Kim, Sanghyun Kirchner, Dana Paraschos, Georgios Filippos Rösch, Florian Schulga, Wladislaw |
| contents | Multiwavelength polarimetry is a powerful tool to probe magnetic field and flow geometries in the relativistic jets of blazars. In this respect, particularly interesting are the sources whose synchrotron emission covers a broad range of frequencies, from radio to X-rays, such as the BL Lac objects of the HSP type. 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 found a strong frequency-dependency of the degree of polarization (with a ratio $Π_X/Π_O\simeq 5.2$). For RGB J0710+591, IXPE derived a 1$σ$ upper limit $Π_X<11.6\%$, comparable with the measured optical degree of polarization (average $Π_O\sim 12\%$). We discuss the results in the framework of current interpretations and, in particular, we report an improved version of the stratified shock model that is able to reproduce the observed data of both sources. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_19193 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The IXPE and multifrequency polarimetric view of the extreme blazars 1ES 1101-232 and RGB J0710+591 Tavecchio, Fabrizio Kim, Dawoon E. Emery, Gabriel Liodakis, Ioannis Agudo, Iván Coppi, Paolo Tagliaferri, Giampiero Di Gesu, Laura Sbarrato, Tullia Ballo, Lucia Sciaccaluga, Alberto Ehlert, Steven R. Bonnoli, Giacomo Aceituno, Francisco José Casadio, Carolina Casanova, Víctor Donnarumma, Immacolata Escudero, Juan Morcuende, Daniel Otero-Santos, Jorge Sota, Alfredo Piirola, Vilppu Kouch, Pouya M. Lindfors, Elina Nilsson, Kari Myserlis, Ioannis Gurwell, Mark Keating, Garrett Rao, Ramprasad Angelakis, Emmanouil Kraus, Alexander Imazawa, Ryo Sasada, Mahito Fukazawa, Yasushi Kawabata, Koji S. Uemura, Makoto Mizuno, Tsunefumi Nakaoka, Tatsuya Tochihara, Sumie Akai, Takahiro Akitaya, Hiroshi Bachev, Rumen Strigachev, Anton Benke, Petra Debbrecht, Lena Eich, Julia Eppel, Florian Gokus, Andrea Hämmerich, Steven Heßdörfer, Jonas Kadler, Matthias Kim, Sanghyun Kirchner, Dana Paraschos, Georgios Filippos Rösch, Florian Schulga, Wladislaw High Energy Astrophysical Phenomena Multiwavelength polarimetry is a powerful tool to probe magnetic field and flow geometries in the relativistic jets of blazars. In this respect, particularly interesting are the sources whose synchrotron emission covers a broad range of frequencies, from radio to X-rays, such as the BL Lac objects of the HSP type. 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 found a strong frequency-dependency of the degree of polarization (with a ratio $Π_X/Π_O\simeq 5.2$). For RGB J0710+591, IXPE derived a 1$σ$ upper limit $Π_X<11.6\%$, comparable with the measured optical degree of polarization (average $Π_O\sim 12\%$). We discuss the results in the framework of current interpretations and, in particular, we report an improved version of the stratified shock model that is able to reproduce the observed data of both sources. |
| title | The IXPE and multifrequency polarimetric view of the extreme blazars 1ES 1101-232 and RGB J0710+591 |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2512.19193 |