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Sagot :
Sirius is a blue-white star, expressing -1.5 magnitude, 9800ºK of temperature, and located 8.6 light-years from the Earth. Its mass is 2 solar mass. Option C.
What is Sirius?
Sirius seems to be one of the most brilliant stars in the sky. It shines with a magnitude of -1.5, being only superated by the moon, the sun, and some planets -Venus and Jupiter-.
Sirius is a blue-white star, 25 times more luminous than the sun, its mass is twice the sun's mass, and its temperature reaches approximately 10000 K. It is the fifth star closer to the Earth, located at a distance of 8.6 light-years.
Sirion is visible from almost every place around the world, excepting latitudes higher than 73º N. It can be seen in the Canis Major constellation. It is also easily identified by looking down from the Orion belt.
Color Surface temperature (ºK) Average mass
red > 25000 60
orange 11000 to 25000 18
yellow-white 7500 to 11000 3.2
white 6000 to 7500 1.7
blue-white 5000 to 6000 1.1
blue 3500 to 5000 0.8
blue < 3500 0.3
According to this chart and the provided information, the mass of this blue-white star shoud be between 1.1 and 3.2 solar mass units.
To make a better estimation of the Sirus mass, we can make use of the following formula,
(M/M₀)²'⁵ = (T/T₀)⁴
This formula describes the relationship between the mass and temperature of the sun and of another star.
Where,
- M ⇒ Mass of the other star
- M₀ ⇒ Mass of the sun ⇒ 1 solar mass.
- T ⇒ Temperature of the other star ⇒ 9800K
- T₀ ⇒ Temperature of the sun ⇒ 5778K
(M/M₀)²'⁵ = (T/T₀)⁴
(M/M₀)²'⁵ = (9800K/5778K)⁴
(M/M₀)²'⁵ = (1.696)⁴
(M/M₀)²'⁵ = 8.27
(M/M₀) = ²'⁵√8.27
(M/M₀) = 2328
M = 2328 x 1 solar mass
M = 2328 solar mass
According to this formula, we might say that the mass of the Sirus star is around 2 solar mass. Option C.
As said before in the introduction, Sirius mass is aproximately twice the sun mass.
You can learn more about star mass at
https://brainly.com/question/9775637
#SPJ1
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