SIMBAD references

2024MNRAS.532.4089A - Mon. Not. R. Astron. Soc., 532, 4089-4105 (2024/August-3)

Study of consecutive eclipses of pulsar J0024-7204O.

ABBATE F., POSSENTI A., RIDOLFI A., BUCHNER S., GEYER M., KRAMER M., ZHANG L., CORONGIU A., CAMILO F. and BAILES M.

Abstract (from CDS):

The eclipses seen in the radio emission of some pulsars can be invaluable to study the properties of the material from the companion stripped away by the pulsar. We present a study of six consecutive eclipses of PSR J0024-7204O in the globular cluster 47 Tucanae as seen by the MeerKAT radio telescope in the UHF (544-1088 MHz) band. A high scintillation state boosted the signal during one of the orbits and allowed a detailed study of the eclipse properties. We measure significant dispersion measure (DM) variations and detect strong scattering that seems to be the dominating mechanism of the eclipses at these frequencies. A complete drop in the linear polarization together with a small increase in the rotation measure suggests the presence of a magnetic field of $\sim 2$ mG. The study of multiple eclipses allowed us to measure difference in the lengths of the eclipses and DM differences of $\sim 0.01$ pc cm$^{-3}$ in consecutive orbits. One orbit, in particular, shows a delay in recovery of the linear polarization and a visible delay in the arrival of the pulses caused by a stronger scattering event. We suggest that these are caused by a higher variance of density fluctuations during the event.

Abstract Copyright: © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): magnetic fields - scattering - binaries: eclipsing - globular clusters: individual: 47 Tucanae

Simbad objects: 22

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