Query : 2013A&A...555A.125M

2013A&A...555A.125M - Astronomy and Astrophysics, volume 555A, 125-125 (2013/7-1)

Towards a theory of extremely intermittent pulsars. I. Does something orbit PSR B1931+24?


Abstract (from CDS):

We investigate whether one or many companions are orbiting the extremely intermittent pulsar PSR B1931+24. We constrained our analysis on previous observations of eight fundamental properties of PSR B1931+24. The most puzzling properties are the intermittent nature of the pulsar's activity, with active and quiet phases that alternate quasi-periodically; the variation of the slowing-down rate of its period between active and quiet phases; and because there are no timing residuals, it is highly unlikely that the pulsar has a massive companion. Here, we examine the effects that one putative companion immersed in the magnetospheric plasma or the wind of the pulsar might have, as well as the associated electric current distribution. We analysed several possibilities for the distance and orbit of this hypothetical companion and the nature of its interaction with the neutron star. We show that if the quasi-periodic behaviour of PSR B1931+24 was caused by a companion orbiting the star with a period of 35 or 70 days, the radio emissions, usually considered to be those of the pulsar would in that specific case be emitted in the companion's environment. We analysed four possible configurations and conclude that none of them would explain the whole set of peculiar properties of PSR 1931+24. We furthermore considered a period of 70 days for the precession of the periastron associated to an orbit very close to the neutron star. This hypothesis is analysed in a companion paper.

Abstract Copyright:

Journal keyword(s): radio continuum: planetary systems - pulsars: individual: PSR B1931+24 - planets and satellites: magnetic fields - plasmas

Simbad objects: 4

goto Full paper

goto View the references in ADS

Number of rows : 4
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 PSR B1257+12 Psr 13 00 03.1075 +12 40 55.155           ~ 512 1
2 PSR B1620-26 Psr 16 23 38.2218 -26 31 53.769     21.30     ~ 291 2
3 PSR J1841-0500 Psr 18 41 18.14 -05 00 19.5           ~ 45 0
4 PSR J1933+2421 Psr 19 33 37.83 +24 36 39.6           ~ 145 0

To bookmark this query, right click on this link: simbad:objects in 2013A&A...555A.125M and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact