Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:astro-ph/0407546)
· References in the article
· Citations to the Article (19) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (7)
· Also-Read Articles (Reads History)
· HEP/Spires Information
·
· Translate This Page
Title:
A Microglitch in the Millisecond Pulsar PSR B1821-24 in M28
Authors:
Cognard, Ismaël; Backer, Donald C.
Affiliation:
AA(Laboratoire de Physique et Chimie de l'Environnement, CNRS, 3A Avenue de la Recherche Scientifique, F-45071 Orleans, Cedex 2, France; ), AB(Department of Astronomy, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720-3411 )
Publication:
The Astrophysical Journal, Volume 612, Issue 2, pp. L125-L127. (ApJL Homepage)
Publication Date:
09/2004
Origin:
UCP
ApJ Keywords:
Stars: Pulsars: General, Stars: Pulsars: Individual: Alphanumeric: PSR B1821-24, Stars: Neutron, Stars: Rotation
DOI:
10.1086/424692
Bibliographic Code:
2004ApJ...612L.125C

Abstract

We report on the observation of a very small glitch observed for the first time in a millisecond pulsar, PSR B1821-24, located in the globular cluster M28. Timing observations were mainly conducted with the Nançay radio telescope (France), and confirmation comes from the 140 ft radio telescope at Green Bank and the new Green Bank Telescope data. This event is characterized by a rotation frequency step of 3 nHz, or 10-11 in fractional frequency change, along with a short duration limited to a few days or a week. A marginally significant frequency derivative step was also found. This glitch follows the main characteristics of those in the slow-period pulsars but is 2 orders of magnitude smaller than the smallest ever recorded. Such an event must be very rare for millisecond pulsars since no other glitches have been detected when the cumulated number of years of millisecond pulsar timing observations up to 2001 is around 500 for all these objects. However, pulsar PSR B1821-24 is one of the youngest among the old recycled ones, and there is likely a correlation between age, or a related parameter, and timing noise. While this event happens on a much smaller scale, the required adjustment of the star to a new equilibrium figure as it spins down is a likely common cause for all glitches.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

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