Are pulses strictly periodic?

Long-term timing reveals glitches, spin-down, binary Doppler shifts, and dispersion in the interstellar medium—real data pipelines subtract many effects.

Do all pulsars emit in radio?

Some are seen chiefly in X-rays or gamma rays; emission mechanisms remain an active research area.

Pulsar Lighthouse

Pulsars are often modeled as rapidly rotating neutron stars with misaligned magnetic axes; charged outflows in the magnetosphere can produce coherent radio emission in a narrow cone. When that cone sweeps past Earth, we detect periodic pulses—the lighthouse cartoon. Millisecond pulsars are spun up by accretion; pulsar timing arrays compare pulse arrival times across years to hunt for nanohertz gravitational waves. This simulator is not a plasma or general relativistic magnetosphere model—only rotation, a wedge beam, and a toy pulse profile.

Who it's for: Astrophysics survey after stellar remnants; motivation for timing and GW methods.

Key terms

Pulsar
Neutron star
Lighthouse model
Magnetosphere
Pulse period
Millisecond pulsar
Timing array

How it works

A pulsar is often pictured as a magnetized neutron star whose misaligned dipole beam sweeps past us like a lighthouse, producing periodic radio pulses when the line of sight crosses the emission cone. Millisecond pulsars are spun up by accretion; timing arrays search for correlated nanosecond signals from gravitational waves. This page is a 2D cartoon of a rotating wedge and a crude pulse profile, not a magnetosphere simulation.

Key equations

ν = 1/P · timing residuals probe binaries & GW backgrounds

Frequently asked questions

Are pulses strictly periodic?: Long-term timing reveals glitches, spin-down, binary Doppler shifts, and dispersion in the interstellar medium—real data pipelines subtract many effects.
Do all pulsars emit in radio?: Some are seen chiefly in X-rays or gamma rays; emission mechanisms remain an active research area.