Stellar wind and stellar disc models of dispersion and rotation measure variations in the PSR B1259 - 63/SS2883 binary system

Details Stellar wind and stellar disc models of dispersion and rotation measure variations in the PSR B1259 - 63/SS2883 binary system Stellar wind and stellar disc models of dispersion and rotation measure variations in the PSR B1259 - 63/SS2883 binary system

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.275..381m&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 275, Issue 2, pp. 381-397.

Astronomy and Astrophysics

Astronomy

40

Binaries: Eclipsing, Circumstellar Matter, Stars: Emission-Line, Be, Stars: Mass-Loss, Pulsars: Individual: Psr B1259-63

Scientific paper

Two models of the PSR B1259-63/SS2883 binary system are evaluated to determine whether they account for the orbital variations in dispersion measure (DM) and rotation measure (RM) observed during the 1994 periastron passage of PSR B1259-63. In the first model, the DM and RM variations are produced by an ionized, radiatively driven, coronal wind from SS2883. The electron density n_e and magnetic field B vary as power laws with distance r from SS2883, and the wind terminates where it collides with the relativistic, electron-positron wind from PSR B1259-63. It is shown that this model - popular in the literature -cannot reproduce the observed pre-periastron rise in DM unless one has n_e~r^-5, with n_e~10^14 cm^-3 at the stellar surface, contrary to the predictions of dynamical wind theories. In the second model, the DM and RM variations are due to a cool, dense, circumstellar disc with an exponential density profile in the radial and vertical directions. Good agreement with the observations is achieved for a disc inclined ~10 deg to the orbital plane, with n_e~10^8 cm^-3 and B~10 kG at the stellar surface, and radial scale size r_D~12r_*. The data do not discriminate between a thin disc (scaleheight h_D<^1/2~0.2n_e. It is shown that the empirical value of r_D is in accord with theory, and that the pulsar-induced component of the wind from SS2883 is weak.

Affiliated with

Also associated with

No associations

Rating

Stellar wind and stellar disc models of dispersion and rotation measure variations in the PSR B1259 - 63/SS2883 binary system does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Stellar wind and stellar disc models of dispersion and rotation measure variations in the PSR B1259 - 63/SS2883 binary system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stellar wind and stellar disc models of dispersion and rotation measure variations in the PSR B1259 - 63/SS2883 binary system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1173717