Gamma-radiation sky maps from compact binaries
| Autor: | Ortiz, Néstor, Carrasco, Federico, Green, Stephen R., Lehner, Luis, Liebling, Steven L., Westernacher-Schneider, John Ryan |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | JCAP02 (2022) 027 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1475-7516/2022/02/027 |
| Popis: | We study sky maps and light curves of gamma-ray emission from neutron stars in compact binaries, and in isolation. We briefly review some gamma-ray emission models, and reproduce sky maps from a standard isolated pulsar in the Separatrix Layer model. We consider isolated pulsars with several variations of a dipole magnetic field, including superpositions, and predict their gamma-ray emission. Our results provide new heuristics on what can and cannot be inferred about the magnetic field configuration of pulsars from high-energy observations. We find that typical double-peak light curves can be produced by pulsars with significant multipole structure beyond a single dipole. For binary systems, we also present a simple approximation that is useful for rapid explorations of binary magnetic field structure. Finally, we predict the gamma-ray emission pattern from a compact black hole-neutron star binary moments before merger by applying the Separatrix Layer model to data simulated in full general relativity; we find that face-on observers receive little emission, equatorial observers see one broad peak, and more generic observers typically see two peaks. Comment: 29 pages, 19 figures. Matches published version |
| Databáze: | arXiv |
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