Strong linear polarization of bremsstrahlung emissivity in photospheres of magnetic white dwarfs

Details Strong linear polarization of bremsstrahlung emissivity in photospheres of magnetic white dwarfs Strong linear polarization of bremsstrahlung emissivity in photospheres of magnetic white dwarfs

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jphcs.172a2052b&link_type=abstract

Journal of Physics: Conference Series, Volume 172, Issue 1, pp. 012052 (2009).

Physics

Scientific paper

We discuss the strong linear polarization and the appreciable decrease of the bremsstrahlung emissivity at frequencies below the electron cyclotron frequency (infrared wave band) in the photospheres of the isolated magnetic white dwarfs. In the photospheres of strongly magnetized white dwarfs (B > 107 G, T ~ 104 K), the electron's Larmor radius becomes smaller than the characteristic impact parameter of close Coulomb collisions in a non-magnetized plasma. Thus, the cyclotron period of the electron becomes smaller than the duration of all distant collisions and of most close collisions. The magnetic field effectively "freezes" the electron motion in the plane transverse to the magnetic field lines. The resulting motion is nearly one-dimensional and parallel to the magnetic field, inducing a strong linear polarization of the bremsstrahlung emission. Being attached to a magnetic field line, an electron cannot approach an ion as closely as it does in the case in which the magnetic field is absent. Thus, the bremsstrahlung emissivity appreciably decreases. We analytically compute an approximation to the spectrum of the strongly linear polarized bremsstrahlung emissivity at the frequencies below the electron cyclotron frequency.

Affiliated with

Also associated with

No associations

Rating

Strong linear polarization of bremsstrahlung emissivity in photospheres of magnetic white dwarfs 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 Strong linear polarization of bremsstrahlung emissivity in photospheres of magnetic white dwarfs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strong linear polarization of bremsstrahlung emissivity in photospheres of magnetic white dwarfs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1631184