Spectra, HR Diagram, Stellar Life Cycle Flashcards
What is synonymous with the absolute magnitude of a star?
Luminosity
How is absolute magnitude different from apparent magnitude?
Apparent magnitude is how bright the star is when viewed from Earth, absolute magnitude is how bright the star is from 33 light years away
When viewed from Earth, what does the colour of a star tell us?
Surface temperature
What can be deduced from the spectral analysis of star light?
Chemical composition
When looking at magnitude, what is the greater measure of magnitude?
A negative reading
Which star in a constellation would be the second brightest?
Beta
Whaat proportion of stars in our galaxy are multiples?
More than 50%
What is the classification of our sun?
1, G
What is the X axis label on the HR diagram?
Temperature (Kelvin)
What is the Y axis label on the HR diagram?
Luminosity
Where are stars found on the HR diagram, based on size?
Larger stars at the top, smaller stars at the bottom
Which groups of stars are the remnants of a star similar to our own?
White dwarfs
Which stars are longest lived?
The smallest stars live for the longest, larger stars live for shorter amounts as they burn fuel faster
How do white dwarfs go against the trend of main sequence stars?
They no longer burn fusion at their centre but still radiate heat, becoming dimmer whilst maintaining higher temperatures
How do red giants have similar masses to our sun, but a considerably larger radius?
They are very luminous and have very low density
