Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998japa...19....1s&link_type=abstract
Journal of Astrophysics and Astronomy, Vol. 19, No. 1 - 2, p. 1 - 18
Astronomy and Astrophysics
Astrophysics
17
Pulsars: Pulse Profiles, Pulsars: Polarimetry
Scientific paper
The characteristics of the "burst" (B) mode and "quiescent" (Q) mode pulse sequences - long known from studies at or below 103 MHz - are identfied at 430 MHz for the first time. An 18-minute, polarimetric observation begins with a long B-mode sequence, which has a highe average intensity, regular drifting subpulses, and a preponderance of primary polarization-mode radiation. An abrupt transition to a Q-mode sequence is then marked. Careful study, however, of profile changes and after this mode change reveals slower variations which both anticipate the abrupt transition and respond to it. This slow variation appears to represent a "pre-switching transition" process; and the combination of effects on slow and abrupt time scales are finally responsible for the formation of the characteristic B- and Q-mode average profiles.
Izvekova Vera A.
Rankin Joanna M.
Rathnasree N.
Suleymanova Svetlana A.
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