Minimum Mass to form a stellar blac khole

Ok.. i wanted to calculate what should be the minimum mass of a star to form a stellar black hole.. i know its three solar masses, but i wanted to derive it

my idea was simple.. put escape velocity to c, and calculate the schwarzchild radius, then calculate the mass for this radius such that the density is LOWER than 10^18 (the nuclear density)

i ended up with 4.3 solar masses.. does this require a higher level analysis? I just want a very simple Non quantum non relativistic approach.. to get a feel for numbers.. is my approach good enough?

Question

Minimum Mass to form a stellar blac khole

Ok.. i wanted to calculate what should be the minimum mass of a star to form a stellar black hole.. i know its three solar masses, but i wanted to derive it

my idea was simple.. put escape velocity to c, and calculate the schwarzchild radius, then calculate the mass for this radius such that the density is LOWER than 10^18 (the nuclear density)

i ended up with 4.3 solar masses.. does this require a higher level analysis? I just want a very simple Non quantum non relativistic approach.. to get a feel for numbers.. is my approach good enough?

anonymous · Answer

why no on ereply? :( :(

anonymous · Answer

well buddy... the actual solar mass is 1.988*10^30... so we taken 3 times of it... and we went through radius calc. by taking the gravity as std and velocity as c so we get the radius of 8.85 km....
then the volume will be 2903.46 
then the density will be 2.054*10^27.....

let me know any corrections required...

keep Asking & answering....

anonymous · Answer

2.054*10^27

is that density allowed? .. how can you achieve such a high density?!