A pulsar-like swing in the polarisation position angle of a nearby fast radio burst
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| author | Mckinven, Ryan Bhardwaj, Mohit Eftekhari, Tarraneh Kilpatrick, Charles D. Kirichenko, Aida Pal, Arpan Cook, Amanda M. Gaensler, B. M. Giri, Utkarsh Kaspi, Victoria M. Michilli, Daniele Nimmo, Kenzie Pearlman, Aaron B. Pleunis, Ziggy Sand, Ketan R. Stairs, Ingrid Andersen, Bridget C. Andrew, Shion Bandura, Kevin Brar, Charanjot Cassanelli, Tomas Chatterjee, Shami Curtin, Alice P. Dong, Fengqiu Adam Eadie, Gwendolyn Fonseca, Emmanuel Ibik, Adaeze L. Kaczmarek, Jane F. Kharel, Bikash Lazda, Mattias Leung, Calvin Li, Dongzi Main, Robert Masui, Kiyoshi W. Mena-Parra, Juan Ng, Cherry Pandhi, Ayush Patil, Swarali Shivraj Prochaska, J. Xavier Rafiei-Ravandi, Masoud Scholz, Paul Shah, Vishwangi Shin, Kaitlyn Smith, Kendrick |
| author_facet | Mckinven, Ryan Bhardwaj, Mohit Eftekhari, Tarraneh Kilpatrick, Charles D. Kirichenko, Aida Pal, Arpan Cook, Amanda M. Gaensler, B. M. Giri, Utkarsh Kaspi, Victoria M. Michilli, Daniele Nimmo, Kenzie Pearlman, Aaron B. Pleunis, Ziggy Sand, Ketan R. Stairs, Ingrid Andersen, Bridget C. Andrew, Shion Bandura, Kevin Brar, Charanjot Cassanelli, Tomas Chatterjee, Shami Curtin, Alice P. Dong, Fengqiu Adam Eadie, Gwendolyn Fonseca, Emmanuel Ibik, Adaeze L. Kaczmarek, Jane F. Kharel, Bikash Lazda, Mattias Leung, Calvin Li, Dongzi Main, Robert Masui, Kiyoshi W. Mena-Parra, Juan Ng, Cherry Pandhi, Ayush Patil, Swarali Shivraj Prochaska, J. Xavier Rafiei-Ravandi, Masoud Scholz, Paul Shah, Vishwangi Shin, Kaitlyn Smith, Kendrick |
| contents | Fast radio bursts (FRBs) last for milliseconds and arrive at Earth from cosmological distances. While their origin(s) and emission mechanism(s) are presently unknown, their signals bear similarities with the much less luminous radio emission generated by pulsars within our Galaxy and several lines of evidence point toward neutron star origins. For pulsars, the linear polarisation position angle (PA) often exhibits evolution over the pulse phase that is interpreted within a geometric framework known as the rotating vector model (RVM). Here, we report on a fast radio burst, FRB 20221022A, detected by the Canadian Hydrogen Intensity Mapping Experiment (CHIME) and localized to a nearby host galaxy ($\sim 65\; \rm{Mpc}$), MCG+14-02-011. This one-off FRB displays a $\sim 130$ degree rotation of its PA over its $\sim 2.5\; \rm{ms}$ burst duration, closely resembling the "S"-shaped PA evolution commonly seen from pulsars and some radio magnetars. The PA evolution disfavours emission models involving shocks far from the source and instead suggests magnetospheric origins for this source which places the emission region close to the FRB central engine, echoing similar conclusions drawn from tempo-polarimetric studies of some repeating sources. This FRB's PA evolution is remarkably well-described by the RVM and, although we cannot determine the inclination and magnetic obliquity due to the unknown period/duty cycle of the source, we can dismiss extremely short-period pulsars (e.g., recycled millisecond pulsars) as potential progenitors. RVM-fitting appears to favour a source occupying a unique position in the period/duty cycle phase space that implies tight opening angles for the beamed emission, significantly reducing burst energy requirements of the source. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_09304 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A pulsar-like swing in the polarisation position angle of a nearby fast radio burst Mckinven, Ryan Bhardwaj, Mohit Eftekhari, Tarraneh Kilpatrick, Charles D. Kirichenko, Aida Pal, Arpan Cook, Amanda M. Gaensler, B. M. Giri, Utkarsh Kaspi, Victoria M. Michilli, Daniele Nimmo, Kenzie Pearlman, Aaron B. Pleunis, Ziggy Sand, Ketan R. Stairs, Ingrid Andersen, Bridget C. Andrew, Shion Bandura, Kevin Brar, Charanjot Cassanelli, Tomas Chatterjee, Shami Curtin, Alice P. Dong, Fengqiu Adam Eadie, Gwendolyn Fonseca, Emmanuel Ibik, Adaeze L. Kaczmarek, Jane F. Kharel, Bikash Lazda, Mattias Leung, Calvin Li, Dongzi Main, Robert Masui, Kiyoshi W. Mena-Parra, Juan Ng, Cherry Pandhi, Ayush Patil, Swarali Shivraj Prochaska, J. Xavier Rafiei-Ravandi, Masoud Scholz, Paul Shah, Vishwangi Shin, Kaitlyn Smith, Kendrick High Energy Astrophysical Phenomena Fast radio bursts (FRBs) last for milliseconds and arrive at Earth from cosmological distances. While their origin(s) and emission mechanism(s) are presently unknown, their signals bear similarities with the much less luminous radio emission generated by pulsars within our Galaxy and several lines of evidence point toward neutron star origins. For pulsars, the linear polarisation position angle (PA) often exhibits evolution over the pulse phase that is interpreted within a geometric framework known as the rotating vector model (RVM). Here, we report on a fast radio burst, FRB 20221022A, detected by the Canadian Hydrogen Intensity Mapping Experiment (CHIME) and localized to a nearby host galaxy ($\sim 65\; \rm{Mpc}$), MCG+14-02-011. This one-off FRB displays a $\sim 130$ degree rotation of its PA over its $\sim 2.5\; \rm{ms}$ burst duration, closely resembling the "S"-shaped PA evolution commonly seen from pulsars and some radio magnetars. The PA evolution disfavours emission models involving shocks far from the source and instead suggests magnetospheric origins for this source which places the emission region close to the FRB central engine, echoing similar conclusions drawn from tempo-polarimetric studies of some repeating sources. This FRB's PA evolution is remarkably well-described by the RVM and, although we cannot determine the inclination and magnetic obliquity due to the unknown period/duty cycle of the source, we can dismiss extremely short-period pulsars (e.g., recycled millisecond pulsars) as potential progenitors. RVM-fitting appears to favour a source occupying a unique position in the period/duty cycle phase space that implies tight opening angles for the beamed emission, significantly reducing burst energy requirements of the source. |
| title | A pulsar-like swing in the polarisation position angle of a nearby fast radio burst |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2402.09304 |