after evolution

Question 1

identify red n blue horizontal sub giant stars on hr dig

Answer 1

f

Question 2

spectral type of Red HB

Answer 2

K G

Question 3

spectral type BlueHB

Answer 3

A B

Question 4

what’s extreme HB

Answer 4

v thin shell subdwarfs
type O B
thin H shell

Question 5

helium content in sdB?

Answer 5

b type sub dwarf (extreme horizontal branch)

solar He content

Question 6

helium content in sdO

Answer 6

v. high

Question 7

AGB burning

Answer 7

CO core
He burn shell
H burn env

Question 8

identify AGB?

Answer 8

core He ~ 0

Question 9

AGB thermal pulses caused by?

Answer 9

when the ashes of H burning shell increase the mass of the He burning shell

Question 10

early AGB

Answer 10

shell expands coz burning
H burning stops
CO core mass inc, becomes degenerate

Question 11

composition n burning in HB vs AGB?

Answer 11

HB: stable He core
H shell

AGB: 
CO core
He shell burn
H shell burn
H env