Analytical expressions for pulse profile of neutron stars in plasma environments
Abstract We present an analytical study of light curves of slowly rotating radio pulsars with emphasis on the chromatic effects derived from the presence of a plasma environment; analyzing the effects of the compactness, the metric model, and the electronic plasma density profile. After doing a nume...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-02-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-023-11331-2 |
| _version_ | 1797853679397634048 |
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| author | Gastón Briozzo Emanuel Gallo |
| author_facet | Gastón Briozzo Emanuel Gallo |
| author_sort | Gastón Briozzo |
| collection | DOAJ |
| description | Abstract We present an analytical study of light curves of slowly rotating radio pulsars with emphasis on the chromatic effects derived from the presence of a plasma environment; analyzing the effects of the compactness, the metric model, and the electronic plasma density profile. After doing a numerical integration of the trajectories and luminosity curves of pulsars for different spherically symmetric metrics representing the exterior region of the pulsar, we generalize the approximate Beloborodov formula in order to include plasma corrections, obtaining simple analytical expressions for the trajectories and the observed flux and significantly simplifying the calculation of the pulse profiles by a drastic reduction of their computational cost. We study the errors committed by our approximation, comparing the numerical and analytical procedures. We also show how to use the new formalism to model the flux coming from different emission caps, not necessarily circular or antipodal and including the case of ring-shaped hot spots. Finally, we extend the classification introduced by Beloborodov to the case of two distinguishable, non-antipodal, finite size emission caps, showing the respective classification maps and some of the characteristic pulse profiles. |
| first_indexed | 2024-04-09T19:53:34Z |
| format | Article |
| id | doaj.art-d48d0a2a293c45d6934c3cba11679910 |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-04-09T19:53:34Z |
| publishDate | 2023-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-d48d0a2a293c45d6934c3cba116799102023-04-03T05:37:32ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522023-02-0183212910.1140/epjc/s10052-023-11331-2Analytical expressions for pulse profile of neutron stars in plasma environmentsGastón Briozzo0Emanuel Gallo1FaMAF, UNC, Instituto de Física Enrique Gaviola (IFEG), CONICETFaMAF, UNC, Instituto de Física Enrique Gaviola (IFEG), CONICETAbstract We present an analytical study of light curves of slowly rotating radio pulsars with emphasis on the chromatic effects derived from the presence of a plasma environment; analyzing the effects of the compactness, the metric model, and the electronic plasma density profile. After doing a numerical integration of the trajectories and luminosity curves of pulsars for different spherically symmetric metrics representing the exterior region of the pulsar, we generalize the approximate Beloborodov formula in order to include plasma corrections, obtaining simple analytical expressions for the trajectories and the observed flux and significantly simplifying the calculation of the pulse profiles by a drastic reduction of their computational cost. We study the errors committed by our approximation, comparing the numerical and analytical procedures. We also show how to use the new formalism to model the flux coming from different emission caps, not necessarily circular or antipodal and including the case of ring-shaped hot spots. Finally, we extend the classification introduced by Beloborodov to the case of two distinguishable, non-antipodal, finite size emission caps, showing the respective classification maps and some of the characteristic pulse profiles.https://doi.org/10.1140/epjc/s10052-023-11331-2 |
| spellingShingle | Gastón Briozzo Emanuel Gallo Analytical expressions for pulse profile of neutron stars in plasma environments European Physical Journal C: Particles and Fields |
| title | Analytical expressions for pulse profile of neutron stars in plasma environments |
| title_full | Analytical expressions for pulse profile of neutron stars in plasma environments |
| title_fullStr | Analytical expressions for pulse profile of neutron stars in plasma environments |
| title_full_unstemmed | Analytical expressions for pulse profile of neutron stars in plasma environments |
| title_short | Analytical expressions for pulse profile of neutron stars in plasma environments |
| title_sort | analytical expressions for pulse profile of neutron stars in plasma environments |
| url | https://doi.org/10.1140/epjc/s10052-023-11331-2 |
| work_keys_str_mv | AT gastonbriozzo analyticalexpressionsforpulseprofileofneutronstarsinplasmaenvironments AT emanuelgallo analyticalexpressionsforpulseprofileofneutronstarsinplasmaenvironments |