Neutron star spin-up

Neutron star spin-up

Neutron star spin up is the name given to the increase in rotational speed over time first noted in Cen X-3 and Her X-1 but now observed in other X-ray pulsars. In the case of Cen X-3, the pulse period is decreasing at the rate of (defined as \frac{P}{\dot{P}}) is 3.4*10^3 years.

The change in rotational period of the neutron star comes from the transition region between the magnetosphere and the plasma flow from the companion star. In this context the magnetosphere is defined as the region of space surrounding the neutron star, in which the magnetic field determines the motion of the plasma. Inside the magnetic field, the plasma will eventually co-rotate with the neutron star while in the transition region, angular momentum from the accretion disk will be transferred via the magnetic field to the neutron star, leading to the spin-up.


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Neutron star — redirects here. For the story by Larry Niven, see Neutron Star (short story). Neutron stars crush half a million times more mass than Earth into a sphere no larger than Manhattan. A neutron star is a type of stellar remnant that can result from… …   Wikipedia

  • Neutron Star (short story) — Neutron Star is an English language science fiction short story written by Larry Niven. It was originally published in the August 1966 issue (Issue 107, Vol 16, No 10) of Worlds of If. It was later reprinted in Neutron Star, (New York: Ballantine …   Wikipedia

  • Radio-quiet neutron star — A radio quiet neutron star is a neutron star that does not seem to emit radio emissions like most other neutron stars. Most neutron stars are pulsars, and emit radio radiation.Quark stars, theoretical neutron star like objects composed of quark… …   Wikipedia

  • Neutron — This article is about the subatomic particle. For other uses, see Neutron (disambiguation). Neutron The quark structure of the neutron. (The color assignment of individual quarks is not important, only that all three colors are present.)… …   Wikipedia

  • star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… …   Universalium

  • Star — For other uses, see Star (disambiguation) …   Wikipedia

  • Spin-statistics theorem — Statistical mechanics Thermodynamics · …   Wikipedia

  • Spin-off (media) — In media, a spin off, sometimes called a sidequel,[1] is a radio program, television program, video game, or any narrative work, derived from one or more already existing works, that focuses, in particular, in more detail on one aspect of that… …   Wikipedia

  • Neutron cross section — Science with Neutrons Foundations Neutron temperature Flux · Radiation  …   Wikipedia

  • Neutron cross-section — The total neutron cross section of an isotope of a chemical element is the effective cross sectional area that an atom of that isotope presents to neutron scattering and absorption. cattering versus absorptionWhen a neutron approaches an atomic… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”