Sirius is the brightest star in the sky (but is located in the Southern hemisphere). It has a luminosity of 25.4 LSun and is 2.67 parsec away (1 parsec = 3.086 ×1016 m). What flux is received on Earth from Sirius? How many times smaller is this than the flux from the Sun?
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: A star is known to be moving at 7.87km/s toward the earth. If you observe the spectral line to be at…
A:
Q: If a star has a surface temperature 2 times lower than the Sun's and a luminosity the same as the…
A: Given, If To is the surface temperature of the sun, Lo is the luminosity of the sun Then for the…
Q: Which spectral line does this likely correspond to?
A: we can use the doppler shift formula to find laboratory wavelength.
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: 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: Star B has a temperature that is 5 times higher than Star A. How much more energy per second…
A:
Q: Which star in the table below has the greatest diameter? Star Name d (parsecs) Parallax…
A: d. 58 Ori
Q: Question A1 a) The Large Magellanic Cloud (LMC) is a galaxy in the vicinity of the Milky Way. It is…
A: Solution/Calculation: a) The Large Magellanic Cloud (LMC) is a galaxy in the vicinity of the Milky…
Q: Star A has an effective temperature of TA = 7200 K and a radius of RA = 2.04R, asecond star, Star…
A: Let LA be defined as the luminosity of star A and LB be defined as the luminosity of star B. The…
Q: Hertzsprung-Russell Diagram
A: In the sky, there are many groups of stars. Some of them are small. while some of them are large.…
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: Favorite Star Polaris is 132 pc from Earth and has an apparent magnitude of 2.5. What is its…
A: When the brightness of a star is measured there are two ways, Apparent and absolute magnitudes.…
Q: What star has the largest stellar parallax as measured from opposite ends of the Earth's orbit about…
A: Parallax is the apparent displacement of an object because of a change in the observer's opinion.…
Q: Let’s say you’re looking for extrasolar planets. You observe a star that has a spectral shift in the…
A: Write down the values using suitable variables. Here, c signifies the speed of light in a vacuum.
Q: the parallax angle of a star to be 0.002 arc-seconds. what would the distance be to this star?
A: Given, Parallax angle, p=0.002 arc-seconds
Q: A light of wavelength 620 nm is emitted from the following four places. What wavelength is observed…
A: As per general relativity, electromagnetic waves or photons that are traveling away from a…
Q: This star has a mass of 3.3 MSun. what is the main sequence lifetime of this star? You may assume…
A: Given data: Mass of the star MStar=3.3 MSun. The life time of the main sequence star is given as,…
Q: receives from the Sun by 8.7 ×10-10 LO. Jupiter's radius is 7.1 ×109 cm and its mass is 1.9 ×10…
A: Given Data: Energy radiated by Jupiter is L=8.7×10-10Lo=8.7×10-10×3.91×1026W/s. The radius of…
Q: a) Define Simple Harmonic Motion. b) One end of a thin rectangular metal strip is firmly clamped to…
A: As per guidelines we are allowed to answer only first three part of question question. if question…
Q: A distant galaxy has an apparent magnitude of 13 and is 5,000 kpc away. What is its absolute…
A: Apparent Magnitude The apparent magnitude of a star or a galaxy is the measure of how bright the…
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: The figure below shows the spectra of two stars on the same scale (Star A = red line; Star B = green…
A: According to Hubble's law, velocity of recession of star from our earth is directly proportional to…
Q: Many of the bright stars in the night sky are highly luminous normal blue stars (such as Acrux), and…
A: Given: The distance between the bright star and the earth is r = 620 light years The luminosity of…
Q: As we read in the book, a star that appears to be 1 magnitude brighter will have approximately 2.5…
A:
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: As we read in the book, a star that appears to be 1 magnitude brighter will have approximately 2.5…
A: Required : Approximate ratio of the flux.
Q: Star 1 and star 2 have the same V-magnitude, V = 7.5. However, they have different B-magnitudes, B1…
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: The white dwarf star Sirius B has a luminosity of 0.025 L⊙. If you were 1 AU from Sirius B, would…
A: Given,Temperature, Apparent magnitude of the sun, The luminosity of the star sirius B, The…
Q: The total intensity of light measured on earth, from an ecliptic binary, is plotted in the figure as…
A:
Q: A star is known to be moving at 8.93km/s toward the earth. If you observe the spectral line to be at…
A: The velocity can be expressed as, v=λobs-λactλactc
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: bol = 7.77. What is th
A: Given: To find the Proxima Centauri absolute magnitude is given as,
Q: Solar constant, Sun, and the 10 pc distance! The luminosity of Sun is 4-- 1026 w - 4-- 1033ergs- 1,…
A: Given: Luminosity or energy radiated by sun, E = 4×1026 W Distance of the Sun from the Earth, rES =…
Q: Calculate the luminosity of Sirius A in solar units.
A: Luminosity is the absolute measure of the radiated power or energy radiated per second of a star or…
Q: Calculate the luminosity of the star with an apparent magnitude of 2. Given the Sun has an apparent…
A: The luminosity of a star is defined as the amount of energy that is radiated from the surface of a…
Sirius is the brightest star in the sky (but is located in the Southern hemisphere). It has a luminosity of 25.4 LSun and is 2.67 parsec away (1 parsec
= 3.086 ×1016 m). What flux is received on Earth from Sirius? How many
times smaller is this than the flux from the Sun?
Step by step
Solved in 2 steps with 2 images