Periodic activity from a fast radio burst source
Autor: | Amiri, M., Andersen, B. C., Bandura, K. M., Bhardwaj, M., Boyle, P. J., Brar, C., Chawla, P., Chen, T., Cliche, J. F., Cubranic, D., Deng, M., Denman, N. T., Dobbs, M., Dong, F. Q., Hill, A. S., Höfer, C., Josephy, A., Kania, J. W., Karuppusamy, R., Kaspi, V. M., Keimpema, A., Kirsten, F., Landecker, T. L., Lang, D. A., Leung, C., Li, D. Z., Lin, H.-H., Marcote, B., Masui, K. W., Mckinven, R., Mena-Parra, J., Merryfield, M., Michilli, D., Milutinovic, N., Mirhosseini, A., Naidu, A., Newburgh, L. B., Ng, C., Nimmo, K., Paragi, Z., Patel, C., Pen, U.-L., Pinsonneault-Marotte, T., Pleunis, Z., Rafiei-Ravandi, M, Rahman, M., Ransom, S. M., Renard, A., Sanghavi, P., Scholz, P., Shaw, J. R., Shin, K., Siegel, S. R., Singh, S., Smegal, R. J., Smith, K. M., Stairs, I. H., Tendulkar, S. P., Tretyakov, I., Vanderlinde, K., Wang, H., Wang, X., Wulf, D., Yadav, P., Zwaniga, A. V., The CHIME/FRB Collaboration |
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Přispěvatelé: | High Energy Astrophys. & Astropart. Phys (API, FNWI), Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research |
Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
Physics
High Energy Astrophysical Phenomena (astro-ph.HE) Multidisciplinary 010308 nuclear & particles physics Fast radio burst Canadian Hydrogen Intensity Mapping Experiment Phase (waves) FOS: Physical sciences Cosmic ray Astrophysics 01 natural sciences Modulation 0103 physical sciences Regular pattern Astrophysics - High Energy Astrophysical Phenomena 010303 astronomy & astrophysics |
Zdroj: | Nature, 582(7812), 351-355. Nature Publishing Group Nature arXiv |
ISSN: | 0028-0836 |
Popis: | Fast radio bursts (FRBs) are bright, millisecond-duration radio transients originating from sources at extragalactic distances1, the origin of which is unknown. Some FRB sources emit repeat bursts, ruling out cataclysmic origins for those events2,3,4. Despite searches for periodicity in repeat burst arrival times on timescales from milliseconds to many days2,5,6,7, these bursts have hitherto been observed to appear sporadically and—although clustered8—without a regular pattern. Here we report observations of a 16.35 ± 0.15 day periodicity (or possibly a higher-frequency alias of that periodicity) from the repeating FRB 180916.J0158+65 detected by the Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst Project4,9. In 38 bursts recorded from 16 September 2018 to 4 February 2020 UTC, we find that all bursts arrive in a five-day phase window, and 50 per cent of the bursts arrive in a 0.6-day phase window. Our results suggest a mechanism for periodic modulation either of the burst emission itself or through external amplification or absorption, and disfavour models invoking purely sporadic processes. |
Databáze: | OpenAIRE |
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