Given the distance to a star is 276394.84AU, and its apparent magnitude is 4.74. What is the luminosity of the star?
Q: Suppose we measure the flux of a star to be F = 9.47 x 10-10 W m-2, and suppose the star is at a…
A: Luminosity is a measure of total electromagnetic power at all wavelength radiated by any star or…
Q: Hertzsprung-Russell Diagram Blue or blue White Vellow Red-orange Red Rigel Beteignuse Aldebaran…
A: As it can be seen from Hertzsprung-Russell diagram that the y axis represents brightness which…
Q: 06
A: Given that:-Luminosity, L=78.4×1026 Watt.Radius, r= 1.2×106 kmr= 1.2×106×103m=1.2×109 mWe know…
Q: A newly discovered bright star has a luminosity of 78.4×1026 w. What is its temperature if it has a…
A: Luminosity is an absolute measure of radiant power, that is, its value is independent of an…
Q: A star is observed with a surface temperature of 3,000 K and a luminosity of 100,000 solar…
A: Given , Temperature = 3000 K Solar Luminosity = 100,000 Now , mass and luminosity are related by…
Q: If the main-sequence mass lower limit is 0.08 solar mass and the brightest main-sequence stars are 1…
A: The Main Sequence Stars are a mass sequence, with low mass stars forming an equilibrium with a cool…
Q: Hertzsprung-Russell Diagram Bhe or bhue white White Vellow Red orange Red ORigel Superglants…
A:
Q: A newly discovered bright star has a luminosity of 78.4×1026 W. What is its temperature if it has a…
A:
Q: If star B is a 5th magnitude star and star C is 9th magnitude, what is their brightness ratio? Light…
A: Apparent magnitude of the star m is the measure of brightness of star from earth. Brightness is also…
Q: In the parallax method of determining stellar distances, the angle to a star is measured while che…
A: Let's assume b=1AU And distance between sun and alpha centaurie is d. θ=2.1x10-4…
Q: If a neutron star has a radius of 9.12 km and a temperature of 3.63 x 106 K, how luminous is it in…
A: 1)Using stefan's lawP = σ A T4Where P is the power σ is the stefan's constant A is the area of…
Q: Which star is actually dimmer than Arcturus?
A: We know that, Distance magnitude is inversional proportional to Brightness. Greater the magnitude,…
Q: A star is observed at a distance of 90 pc. What will be its parallax angle?
A: Parallax is defined as the change in the apparent position of an object due to a change in the…
Q: Which star in the table below has the greatest diameter? Star Name d (parsecs) Parallax…
A: d. 58 Ori
Q: A white dwarf star has a visual luminosity of 0.046LSun. If you were 1 AU from the white dwarf, what…
A: Ldwarf = 0.046Lsun Distance d = 1 AU = 1.496×1011 m Lsun = 3.827×1026 W
Q: V B r 10.401 10.894 12.303 9.459 9.656 9.477 11.635 12.744 11.229 i 9.705 9.661 10.837 Parallax…
A: Given as,
Q: What is the temperature of a star emitting light with a peak wavelength of 7,080 angstroms? T=…
A: Given : λmax = 7080 angstroms = 7080*10-10 m. From Wien's law the temperature of star is T =…
Q: A star is observed to be thrice the size of the Sun with temperature of 1.3Tsun. Estimate its…
A: The energy radiated by a star is defined as its luminosity. Luminosity depends on the temperature…
Q: Find the wavelength of peak intensity for a hot 45000 K star that emits thermal radiation.
A: Given in question that Temperature of the object(T) = 45000 K.
Q: An O8 V star has an apparent magnitude of +2. Use the method of spectroscopic parallax to estimate…
A: The apparent magnitude m of the star is given to be m=+1. From HR absolute magnitude M of a star…
Q: . The spectrum of Star A peaks at 700 nm. The spectrum of Star B peaks at 470 nm. We know nothing…
A:
Q: Consider the colour-magnitude diagrams for the three stellar clusters in the image below. Which of…
A: The given data is made using a B-V filter. It is a blue filter that only allows blue wavelength and…
Q: Two stars have the difference between their apparent magnitudes +5, so their apparent luminosity…
A: The difference between the apparent magnitude is given as m1-m2=+5
Q: A distant FO star is 6.3 times less bright than a nearer FO star which has a parallax of 0.2 arcsec.…
A:
Q: What is the luminosity of a star having three times the radius of the Sun and a surface temperature…
A: The luminosity of a star is a measure of the total amount of energy that is radiated by a star per…
Q: Explain how some stars form in binary systems.
A: There are number of ways stars can be formed in binary systems. They are discussed below.
Q: What measurements would you make (assuming you have the money, time, & equipment) to determine a…
A: In this question we have to answer what measurements we will make to determine the surface…
Q: Which type of star would be the largest? a. M b. O c. B d. K e. A
A:
Q: If a star has a parallax of 2 x 10 degree, how far away is it? O 7 pc O 14 pc O 28 pc O 5x 104 LY
A: Given, parallax angle θ=2 x 10-5 degree θ=2 x 10-5 x 3600…
Q: A newly discovered bright star has a luminosity of 78.4×1026 W. What is its temperature if it has a…
A:
Q: .
A:
Q: You observe a star with an apparent magnitude mv=12 at a distance of 1 kiloparsec. What is this…
A: The relation between apparent magnitude, absolute magnitude, and distance of star in parsec is given…
Q: A distant F0 star is 6.3 times less bright than a nearer F0 star which has a parallax of 0.2…
A: Given: p=0.2 arcsec The distance of the distant F0 star from the nearer F0 star is : d=1p=10.2=5…
Q: In a laboratory, the Balmer-beta spectral line of hydrogen has a wavelength of 486.1 nm. If the line…
A: vr=cλ0-λλ0
Q: If a star has a surface temperature of 9500K. What would be the frequency of the light given off at…
A: The problem can be solved using the Wien's displacement law. This states that the black body…
Q: If a T Tauri star is the same temperature as the sun but is ten times more luminous, what is its…
A: The energy radiated by a star per second is known as its luminosity and is directly proportional to…
Q: In a laboratory, the Balmer-beta spectral line of hydrogen has a wavelength of 486.1 nm . If the…
A: Wavelength of (λ°) = 481.6 nm Difference of wavelength ∆ λ = λ- λ° = 486.1- 485.8 = 0.3 nm Speed of…
Q: Calculate the absolute magnitude of a star at a distance of 6 pc with an apparent magnitude of 3.
A: The apparent magnitude and absolute magnitude are two terms used to define the brightness of a star.…
Q: A star is observed to have a parallax of 0.0015". What is the distance to the star in units of AU?
A: The distance to the star can be calculated using the formula: distance (in parsecs) = 1 / parallax…
Q: 5) Let's use this expression to solve a problem. Star X and Star Y are intrinsically identical…
A: Given, star X is located 20 light-years from earth star Y is located 40 light-years from earth…
Q: A star has a luminosity (power output) of 9.2x1026 W and a diameter of 6.1x108 m. What is its…
A:
Q: A star has a distance of 40 pc. What is the parallax of the star?
A: The distance of a star and its parallax are related as, d=1/p, where, d= distance in parsecs, and…
Q: A star has an apparent magnitude of 10 and an absolute magnitude of 2.5. How far is it?
A:
Q: the Sun?
A: Given: To explain the star which is white supergiant star also brightest and hottest than the Sun…
Q: D5
A: Given that:-Luminosity, L=78.4×1026 WattRadius, r=1.2×106 km=1.2×106×103 m=1.2×109 mLuminosity,…
Q: A star"s position in the sky against distant background objects has shifted by 0.4" in 6 months it…
A: Given: shift, 0.4'' in 6 months To Find: (a) stellar parallax p of star (b) distance of star from…
Given the distance to a star is 276394.84AU, and its apparent magnitude is 4.74. What is the luminosity of the star?
Step by step
Solved in 2 steps