Phase shifts in multi-frequency observations of the drift bands of J0034-0721

Autor:	Samuel J. McSweeney, S. E. Tremblay, N. D. Ramesh Bhat, Avinash A. Deshpande
Rok vydání:	2017
Předmět:	Phase difference Physics Pulsar Space and Planetary Science Astrophysics::High Energy Astrophysical Phenomena Phase (waves) Mode (statistics) Magnetosphere Astronomy and Astrophysics Dipolar field Computational physics
Zdroj:	Proceedings of the International Astronomical Union. 13:376-377
ISSN:	1743-9221 1743-9213
Popis:	We observed single pulses from PSR J0034-0721 (B0031-07) simultaneously at the MWA (185 MHz) and the GMRT (610 MHz). Correlation analyses reveal that the phase difference of the average profiles at the two frequencies differs from the phase difference observed between individual subpulses, indicating that the individual emission columns above the pulsar’s rotating carousel of sparks do not evolve in frequency in the same way that the global magnetosphere does. This hints at a possible departure from the dipolar field geometry in this pulsar’s emission region. Moreover, the discrepancy depends on the drift mode, suggestive of a way to constrain the emission heights associated with each drift mode.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::add116236799af746b7211091c28921f https://doi.org/10.1017/s1743921317008420 Zobrazit plný text záznamu Plný text ve formátu PDF