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What star has the surface temperature of approximatly 9000 k and luminosity 1 to 20 times greater then the suns luminosity?
Wiki User
∙ 10y ago
There are millions of stars that fit that description. On the Main Sequence a star needs a spectrum of type A to be around 9000 degrees, and 1 to 20 times the luminosity of the Sun means an absolute magnitude in the range 1.2 to 4.7. For example Sirius.
Wiki User
∙ 10y ago
Wiki User
∙ 13y agosirius
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If a star has a large luminosity and also a low surface temperature then it must have?
..... something wrong with it. Generally luminosity is related to temperature.
Does An HR diagram plots a stars luminosity and surface temperature?
Yes.
What are the two axes of a Hertzsprung-Russell diagram labeled?
surface temperature and luminosity
Which two stars have the most similar luminosity and surface temperature?
alpha centari and the sun
Which of the following stars has a surface temperature of approximately 9000 K and luminosity about 1 or 20 times greater than the Sun's luminosity?
Don't write "the following" if you don't provide a list - it doesn't make any sense.
What star has a surface temperature 9000k and luminosity about 1 to 20 times greater than the sun?
Sirius
What happens to the surface temperature and luminosity when gravity first assembles a protostar from a collapsing cloud?
Its surface temperature and luminosity increase.
If a star has a large luminosity and also a low surface temperature then it must have?
..... something wrong with it. Generally luminosity is related to temperature.
Which statement describes the general relationship between temperature and luminosity of main sequence stars?
as surface temperature increases, luminosity increases
How does the luminosity of a blackbody vary with its surface temperature?
Both the absorption and the luminosity of a blackbody in equilibrium increase in magnitude with increasing temperature, and the spectral distribution of the luminosity increases in frequency (decreases in wavelength).
Why does the luminosity of the star depend on both its radius and its temperature?
The bigger the star's radius, the greater its surface area which emits the light. The bigger the temperature, the more luminous is the light the star is emitting.
Does An HR diagram plots a stars luminosity and surface temperature?
Yes.
What are the two axes of a Hertzsprung-Russell diagram labeled?
surface temperature and luminosity
Which two stars have the most similar luminosity and surface temperature?
alpha centari and the sun
What if the star has a bigger surface area but a smaller temperature how would that affect the luminosity?
As temperature decreases, luminosity will also decrease As radius increases (and with it surface area, but radius is a much easier to work with if you're trying to compare stars so we usually say radius) luminosity will also increase. If both are happening at the same time, it is possible that the luminosity of the star will remain more or less constant. Often one change will dominate the other, such as when a star goes through the red giant phase when the increase in radius has a far greater effect than the drop in temperature, and the star becomes more luminous.
What does the Hertzsprung-Russell compare?
They compare surface temperature (horizontal axis) and luminosity (vertical axis).
What type of star has a low surface temperature and a low luminosity?
Robert De Niro, the years of 2020+
