Ep001 - Understanding the colours of nebulae
Автор: Ángel R. López-Sánchez
Загружено: 2020-07-05
Просмотров: 3060
Or why square brackets are important when naming metallic transitions in nebulae.
Do you know how profesional astrophysicists and amateur astronomers get vibrant colour images of nebulae? In this video I provide insights of the Physics behind these images. I emphasise why the ionic transitions of metallic elements (i.e., any element that is not hydrogen or helium) in nebulae must be written with brackets, as they are not recombination lines but collisional excited lines, that is, a kind of forbidden lines that only appear in extreme low-density gases because of the collision of ions with free electrons in the gas.
(An extended description, a link to an article in my webpage, and more, will be added here soon).
Updated with corrected subtitles in English.
Subtítulos también disponibles en español, adaptados por mí mismo.
Credit: Ángel R. López-Sánchez
Astrophysicist and Science Communicator
Australian Astronomical Optics - Macquarie University, Australia.
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