Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic On-line Article (HTML)
· Table of Contents
· Citations to the Article (2) (Citation History)
· Refereed Citations to the Article
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The Drift Modes of Pulsar B0943+10
Authors:
Rankin, Joanna M.; Stappers, Ben
Affiliation:
AA(University of Vermont, Vermont), AB(Stichting ASTRON & University of Amsterdam, NL)
Publication:
40 YEARS OF PULSARS: Millisecond Pulsars, Magnetars and More. AIP Conference Proceedings, Volume 983, pp. 112-114 (2008). (AIPC Homepage)
Publication Date:
02/2008
Origin:
AIP
PACS Keywords:
Pulsars, Neutron stars, Radio telescopes and instrumentation; heterodyne receivers
DOI:
10.1063/1.2900117
Bibliographic Code:
2008AIPC..983..112R

Abstract

Pulsar B0943+10 is well known for its `B' (burst) mode, characterized by accurately drifting subpulses, in contrast to its chaotic `Q' (quiet) mode. Six new Arecibo observations at 327 MHz, with durations of 2+hours each, shed considerable light on the modal dynamics of this pulsar. Of these, three were found to be exclusively `B' mode, and three were discovered to exhibit transitions from the `Q' to the `B' mode. One of these observations permitted determination of the subbeam-carousel circulation time in the `Q' mode for the first time, at some 36.4+/-0.9 stellar-rotation periods. The onset of the `B' mode was observed to commence similarly in all three observations. The initial circulation time of about 36 periods relaxed to nearly 38 periods in a roughly exponential fashion with a characteristic time of an hour-the longest characteristic time known in a mode-switching pulsar. Moreover, at `B'-mode onset the pulsar exhibits a symmetrical resolved-double profile form with a stronger trailing component; but this component slowly dies away leaving the usual single `B'-mode profile with the longitude of the magnetic axis falling at about its trailing half power point. None of this, however, elucidates how `B'- and `Q'-mode intervals alternate within an overall cycle. We report the first observations of this full modal cycle using the Westerbork telescope.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
  New!

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints