Linked from

The 23 pages that link to Photoionization, each with the reason it gives.

• H II regionRelated: Stellar ultraviolet photons ionize hydrogen throughout the region.

• Ionization energyRelated: Photons supply the energy needed to exceed an ionization threshold.

• Planetary nebulaRelated: Ultraviolet light from the exposed stellar core ionizes the ejected gas.

• Stellar feedbackRelated: Ultraviolet starlight ionizes and heats surrounding gas, creating expanding regions.

• ReionizationRelated: It is the basic interaction by which early ultraviolet radiation ionized intergalactic hydrogen.

• Orion NebulaRelated: Ultraviolet photons from young stars create the nebula’s ionized gas.

• Emission nebulaRelated: Ultraviolet photons from hot stars ionize the gas that makes an emission nebula glow.

• IonosphereRelated: Solar ultraviolet and X-ray photons create much of the ionosphere’s free-electron population.

• NebulaRelated: Ultraviolet photons from hot stars ionize gas, producing emission from nebulae.

• Carina NebulaRelated: Ultraviolet photons from hot stars ionize the nebula's hydrogen and create glowing emission.

• Circumgalactic mediumRelated: Ionization state determines which spectral lines reveal circumgalactic gas.

• PhotoevaporationRelated: Ionizing photons often supply the heat that drives gas out of an irradiated cloud.

• Ring NebulaRelated: Ultraviolet light from the central star produces the nebula's glowing ionized gas.

• Broad-line regionRelated: Radiation from the central source ionizes the gas and drives its emission lines.

• Cat's Eye NebulaRelated: Ultraviolet radiation from the hot central star makes the nebular gas glow.

• Rosette NebulaRelated: Ultraviolet photons from NGC 2244 ionize hydrogen across the nebula.

• Dumbbell NebulaRelated: Ultraviolet radiation from the central star ionizes the nebula’s gas, producing its emission.

• Low-ionization nuclear emission-line regionRelated: Ultraviolet photons from an active nucleus or stars can ionize the gas emitting LINER lines.

• NGC 6302Related: Ultraviolet radiation from the central star ionizes gas that emits the nebula’s visible light.

• Omega NebulaRelated: Ultraviolet photons from hot stars ionize the nebula's hydrogen.

• NGC 7027Related: Ultraviolet light from the central star ionizes gas and powers much of the nebula's glow.

• Westerhout 40Related: Ultraviolet photons from Westerhout 40’s young massive stars create its ionized gas.