If a star has a surface temperature of 3000 K but a luminosity 150 times greater than our Sun, what size is this star? Give your answer in units of the solar radius, R.
Q: Use a diagram to explain what is meant by the parallax angle, p, for a star observed twice from…
A: Diagram for explaining parallax angle: o star / \…
Q: A star has a surface temperature of T = 10,000 K and a radius three times that of the Sun, R = 3R…
A:
Q: What are the approximate spectral type, temperature, absolute magnitude number, and luminosity of…
A: Required : Spectral type, absolute magnitude, temperature and luminosity of star E.
Q: For a main sequence star with luminosity L, how many kilograms of hydrogen is being converted into…
A:
Q: An astronomical image shows two objects that have the same apparent magnitude, i.e., the same…
A: Let the luminosity of the star is Ls= LoLuminosity of Milky Way galaxy, Lm=1011LoLuminosity of…
Q: sequence
A: Hertzsprung-Russell's diagram clearly shows that the star spends most of its life as a main-sequence…
Q: Consider two stars on the main sequence, A and B. Star A has a mass of Мо Star B has a mass of 0.2…
A: Solution attached in the photo
Q: If the surface Temperature of a star was about 11000.0 K instead of 7000.0 K what is the ratio of…
A: Given , temperature of the star is 11000 K instead of 7000 K How many times greater is the magnitude…
Q: Suppose the distance to a star is doubled. Then the luminosity of the star is O Remains the same,…
A: Luminosity and apparent brightness are 2 different things. Luminosity is unique property of body and…
Q: ou observe a star with a telescope over the course of a year. You find that this star has a flux…
A: .In vertical direction:psinθ=40sin60Psinθ=4032Psinθ=34.6410 free body diagram:
Q: As we read in the book, a star that appears to be 1 magnitude brighter will have approximately 2.5…
A:
Q: The total luminosity of the Sun is 4e26 Watts. a) What is the mass (in kg) that the Sun loses each…
A:
Q: 1:Which star has been redshifted the most? 2:Which star is moving towards us the fastest? Star C…
A: Redshift star: The star is said to be redshifted when it shows the displacement of its spectral…
Q: We will take a moment tổ compare ROw BrigriLIy a Wiite uwan stal sines Compdleu 10 a leu glant 3lai.…
A: Given: Tw=10,000 KTR=5,000 KRw=1100RsunRR=100Rsun we have to find ratio of Luminosity: LRLw=?
Q: Calculate by how many times Betelgeuse is brighter than the Sun, if its parallax is 0.006 arcsec,…
A: The objective of the question is to calculate how much brighter Betelgeuse is compared to the Sun.…
Q: Consider the following question: How many times bigger than the sun would a cool star (4000K) have…
A:
Q: This star has a mass of 3.3 MSun. What is the main sequence lifetime of this star? You may assume…
A: The main sequence lifetime is given as:t α1M2.5it is given star has mass of 3.3 MSunSo,…
Q: We will take a moment to compare how brightly a white dwarf star shines compared to a red giant…
A: The luminosity () of a star is related to its surface temperature () and radius () through the…
Q: Choose the statements that correctly describe the characteristics of the stars located in the…
A: Option-E is the correct option.
Q: Using the center-of-mass equations or the Center of Mass Calculator (under Binary-Star Basics,…
A: Given: In this question, the given details are Consider the star 1 has m1=3.4 solar masses, and the…
Q: For the PP chain 0.7% of the mass participating in nuclear fusion is liberated as energy which…
A:
Q: Let us imagine that the spectrum of a star is collected and we find the absorption line of…
A: Since ∆λ/λ = v/c where c = 3*10-8m/s v = velocity of star…
Q: (a) The figure shows the three stars and their velocities. Which star has the largest proper motion?…
A:
Q: Finally estimate the lifetime of an M0 spectral type star if the total mass of the star is M =…
A:
If a star has a surface temperature of 3000 K but a luminosity 150 times greater than our Sun, what size is this star? Give your answer in units of the solar radius, R.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- A main sequence star of mass 25 M⊙has a luminosity of approximately 80,000 L⊙. a. At what rate DOES MASS VANISH as H is fused to He in the star’s core? Note: When we say “mass vanish '' what we really mean is “gets converted into energy and leaves the star as light”. Note: approximate answer: 3.55 E14 kg/s b. At what rate is H converted into He? To do this you need to take into account that for every kg of hydrogen burned, only 0.7% gets converted into energy while the rest turns into helium. Approximate answer = 5E16 kg/s c. Assuming that only the 10% of the star’s mass in the central regions will get hot enough for fusion, calculate the main sequence lifetime of the star. Put your answer in years, and compare it to the lifetime of the Sun. It should be much, much shorter. Approximate answer: 30 million years.How many times hotter than our sun is the hottest type O star, which has a surface temperature 40,000 K? Number times hotter =Two stars-A and B, of luminosities 0.5 and 4.5 times the observed to have the luminosity of the Sun, respectively-are same apparent brightness. Which star is more distant, and how much farther away is it than the other?
- Do this in 10 min. I will give like on answerSuppose a protostar has a luminosity of 39,473 L⊙ and a surface temperature of 4,130 K (Kelvins). What is the radius of this protostar? [Enter your answer as a multiple of the Sun's radius. I.e., if you find R = 20 R⊙ , enter 20. This problem is easier if you start with the relevant equation and create a ratio using the Sun's values. Recall that the Sun has a surface temperature of 5778 K. ]12. A star with spectral type MO has a surface temperature of 3750 K and a radius of 0.63 Rsun: How many times more luminous is this star than the Sun? (if it is less luminous enter a number less than one) Answer: Submit All Answers Last Answer: 0.0923 Incorrect, tries 1/5. Hint: Use the Luminosity equation, which says that L is proportional to R^2 T^4. If you keep these as ratios compared to the sun, your L will also come out as a ratio compared to the Sun. This star has a mass of 0.4 Msun- Using the simple approximation that we made in class, what is the main sequence lifetime of this star? You may assume that the lifetime of the sun is 1010 yr. Answer: Submit All Answers Compare this to the lifetime of a MO star listed in Table 22.1 (computed using a more sophisticated approach). Is the value you calculated in the previous problem longer or shorter than what is reported in the table? (L for longer, S for shorter) (You only get one try at this problem.) Answer: Submit All Answers
- A star with spectral type A0 has a surface temperature of 9600 K and a radius of 2.2 RSun. How many times more luminous is this star than the Sun? (if it is less luminous enter a number less than one) 36.854 This star has a mass of 3.3 MSun. Using the simple approximation that we made in class, what is the main sequence lifetime of this star? You may assume that the lifetime of the sun is 1010 yr.The star Rigel has a radial velocity r = 20.7km s-1, parallax 700 = 4.22mas, and proper motion components la= 1.67mas yr'in right ascension and us = 0.56mas yr1 in declination. What are its total proper motion, %3D %3D %3D tangential velocity, and space motion?(Answer don't copy with hand written please)As a star runs out of hydrogen to fuel nuclear fusion in its core, changes within the star usually cause it to leave the main sequence, expanding and cooling as it does so. Would a star with a radius 12 times that of the Sun, but a surface temperature 0.5 times that of the Sun, be more, or less luminous than the Sun? Show and explain your reasoning. You may assume the surface area of a sphere is A = 4πr2.