Lifespan of a blue giant

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Hi. I couldn't find good information of this online, so I'll ask here.
I'm wondering what the maximum possible lifespan of a particular star.
Here's what is known of it:
It's a B class-blue giant star.
Its surface temperature is 25,000 K.
(This is very vague and may offer no help but:) It has no lower than 40,000 G force, and no more than 2.7 Billion.
 

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  • #2
Drakkith
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I'm wondering what the maximum possible lifespan of a particular star.
Here's what is known of it:
It's a B class-blue giant star.
Its surface temperature is 25,000 K.
The hyperphysics calculator tells me a B class star with a mass of 16 solar masses has a maximum lifetime of around 10 million years.

(This is very vague and may offer no help but:) It has no lower than 40,000 G force, and no more than 2.7 Billion.
I have no idea what this means.
 
  • #3
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Hi. I couldn't find good information of this online, so I'll ask here.
I'm wondering what the maximum possible lifespan of a particular star.
Here's what is known of it:
It's a B class-blue giant star.
Its surface temperature is 25,000 K.
(This is very vague and may offer no help but:) It has no lower than 40,000 G force, and no more than 2.7 Billion.
The lifespan of a main sequence star is estimated based upon its mass, as follows:

Main Sequence Stellar Lifespan ≅ 1010 x M-2.5
Where M = Solar Masses

Based upon the information you provided, a spectral type B main sequence star with a effective surface temperature of 25,000°K, should have a mass somewhere between 12 and 13 M, which would give it a lifespan somewhere between 16.4 million and 20 million years.
 
  • #4
Chronos
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20 million sounds about right.
 
  • #5
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Thanks you lot.
 

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