<p>Recently, I had a homework question that gave me the mass of a main-sequence star, that is, M_tp = 0.9 M_solar, and the population formed at the same time. I am supposed to use the stellar birth function to help determine the answer. However, I still have no idea how to approach this. Can someone explain how someone would approach this question?</p>

CC BY-SA 4.0
2022-12-04T23:45:19.493Z
What is M_tp? Just some stellar mass from one part of the homework?
planetmaker
CC BY-SA 4.0
2022-12-04T23:59:15.250Z
So, there is a specific mass where the main-sequence star gets off the main-sequence to turn into a giant. By the terms of this question, this is assuming that the main-sequence star gets off of the main-sequence with a solar mass M = 0.9
Casper
CC BY-SA 4.0
2022-12-05T07:20:19.530Z
Is the question to estimate the number of black holes, etc in the galaxy or within that cluster? If the latter: what's the mass and age?
planetmaker
CC BY-SA 4.0
2022-12-05T14:45:29.973Z
Related: https://astronomy.stackexchange.com/questions/4725/statistically-what-would-the-average-distance-of-the-closest-black-hole-be https://astronomy.stackexchange.com/questions/16678/how-far-away-is-the-nearest-compact-star-remnant-likely-to-be?noredirect=1&lq=1
ProfRob
<black-hole><stellar-astrophysics><white-dwarf>
How do I estimate the number of neutron stars and black holes relative to the number of stars in the main sequence and white dwarfs?
Casper
# How do I estimate the number of neutron stars and black holes relative to the number of stars in the main sequence and white dwarfs?

(Asked by: username_0 on 2022-12-04)

Recently, I had a homework question that gave me the mass of a main-sequence star, that is, M\_tp = 0.9 M\_solar, and the population formed at the same time. I am supposed to use the stellar birth function to help determine the answer. However, I still have no idea how to approach this. Can someone explain how someone would approach this question?

**Tags:** black-hole, stellar-astrophysics, white-dwarf

> **Comments:**
> **username_1**: What is M_tp? Just some stellar mass from one part of the homework?  
> **username_0**: So, there is a specific mass where the main-sequence star gets off the main-sequence to turn into a giant. By the terms of this question, this is assuming that the main-sequence star gets off of the main-sequence with a solar mass M = 0.9  
> **username_1**: Is the question to estimate the number of black holes, etc in the galaxy or within that cluster? If the latter: what's the mass and age?  
> **username_2**: Related: https://astronomy.stackexchange.com/questions/4725/statistically-what-would-the-average-distance-of-the-closest-black-hole-be https://astronomy.stackexchange.com/questions/16678/how-far-away-is-the-nearest-compact-star-remnant-likely-to-be?noredirect=1&lq=1  

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## 0 answers

