Astronomical Applications of Spectroscopy (HSC SSCE Physics): Flashcards
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Practise the cards
10 cards from this deck
Spectral classification sequence (hottest to coolest)
Spectral classification sequence (hottest to coolest)
OBAFGKM
Mnemonic for OBAFGKM sequence
Mnemonic for OBAFGKM sequence
Oh Be A Fine Girl/Guy Kiss Me
Scientist who first declared Sun is a star (1860s)
Scientist who first declared Sun is a star (1860s)
Angelo Secci
Why stars above show no hydrogen lines
Why stars above show no hydrogen lines
Hydrogen becomes completely ionised
Black body radiation
Black body radiation
EM radiation pattern emitted by objects due to temperature
Surface temp of blue stars (in K)
Surface temp of blue stars (in K)
~
Doppler shift when star approaches observer
Doppler shift when star approaches observer
Blue shift (shorter wavelengths)
Doppler shift when star recedes from observer
Doppler shift when star recedes from observer
Red shift (longer wavelengths)
Effect of stellar rotation on spectral lines
Effect of stellar rotation on spectral lines
Lines appear broader
Spectral lines in lower density stellar atmospheres
Spectral lines in lower density stellar atmospheres
Sharper and narrower