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How do you calculate stellar radii?
Let Ls be the luminosity of the Sun, L be the luminosity of another star, Ts be the temperature of the Sun, T be the temperature of the other star, Rs be the radius of the Sun, and R be the radius of the other star. d = 1/p = 1/….Calculating the Radius of a Star.
| b-v | Surface Temperature (Kelvin) |
|---|---|
| 1.61 | 3000 |
What is the stellar radius of the sun?
432,690 mi
Sun/Radius
What is the relationship between stellar temperature radius and luminosity?
This is the Luminosity-Radius-Temperature Relation for stars. In words: ” The Luminosity of a star is proportional to its Effective Temperature to the 4th power and its Radius squared.”
What is the radius of Betelgeuse?
383.4 million mi (887 R☉)
Betelgeuse/Radius
How do the stars luminosity compare with their radii?
As the size of a star increases, luminosity increases. If you think about it, a larger star has more surface area. That increased surface area allows more light and energy to be given off. Temperature also affects a star’s luminosity.
What is stellar temperature?
[′stel·ər ′tem·prə·chər] (astrophysics) Any temperature above several million degrees, such as occurs naturally in the interior of the sun and other stars.
How is stellar luminosity calculated?
A star’s luminosity, which is how much energy is emitted per second from the star, is measured in Watts or in solar luminosities (L⊙) where 1L⊙ = 3.85 x 1026 Watt. We determine a star’s luminosity by measuring its distance and its apparent brightness, which we call its apparent magnitude.
What is stellar luminosity?
The stellar luminosity function is a description of the relative number of stars of different absolute luminosities.
Why do supergiants have high luminosity?
Supergiant stars that are old enough to be fusing helium instead of hydrogen. This process releases more energy, causing the star’s outer layers to swell.
How far is Earth from Betelgeuse?
642.5 light years
Betelgeuse/Distance to Earth
Answer: Betelgeuse is 650 light years from Earth so it takes light 650 years to reach us . If the explosion happened in the Year 3000 AD, then we will see the light arrive in the year 3650 AD, 650 years AFTER the event occurred.