If a star has an apparent magnitude equal to its absolute magnitude, how far away is it in parsecs?

Q: Suppose the Sun was part of a binary star system with a period of 15 years and an average separation…

A: Given data Time period ,T=15 years=15×3.154×107 sec Radius, r=10 AU=1.496×1012 m

Q: What is the distance in parsecs to Vega, which has an annual parallax of 0.129 arcsec.

A: Annual parallax (p), p=0.129 arcsec

Q: If the parallax angle of a star is 0.5", what is the star's distance in light years and kilometers?

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Q: Rank the following stars in order of increasing radius: Star A Star B Star C Surface temperature…

A: For star A  Surface temperature =6000 K Luminosity =1 For star B Surface temperature =4000 K…

Q: If the parallax angle of a star is (0.369) arcseconds, then the distance of the star from the Earth…

A: Using the relationship between the parallax angle and distance of the star and the earth is given…

Q: The velocities of the two stars are 28km/s and 13km/s, and their periods are both 16 years. Find the…

A: Formula Let period of a star is T, velocity is v, orbital radius is r and , mass is M, Now the…

Q: Find the distance in parsecs to Vega, which has an annual parallax of 0.129 arcsec. pc

A: It is given that,

Q: Star B is located 2.6 times farther from earth than Star A, but both have the same apparent visual…

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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: If a star has a parallax of 0.025 arc second and an apparent magnitude of 5.0, how far away is it,…

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Q: If a star has an apparent magnitude of 3.5 and an absolute magnitude of 5, how far away is it?

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Q: The energy in Joules per second (J/sec) falling on one square meter is defined as   a. absolute…

A: The apparent brightness of an object that appears to the human eye is known as Luminance. What we…

Q: The apparent visual magnitude of star (Rigel) is 0.12.  Use the method of spectroscopic parallax to…

A: The distance to the star is given by, d=10m-M+55 Here, d is the distance in parsecs, m is the…

Q: Calculate the distance of a star if the stellar spectrum indicates an absolute magnitude of -10.0,…

A: The expression for the distance can be written as m-M=5logd10…

Q: Apparent magnitude is the amount of light a star actually gives off O True O False

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Q: A star has a parallax angle of 0.0270 arcseconds and an apparent magnitude of 4.641. What is the…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: A star has an apparent magnitude of 10.0 and an absolute magnitude of 2.5. How far away is it?

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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: If a star is 30 parsecs away what is it's observed parallax shift ?

A: Given thatThe distance to the star (d)=30 parsecsParallax Formulad=1pp=the parallax angle of the…

Q: is

A: The relationship between apparent visual magnitude(m), Absolute visual magnitude(Mv) and distance(d)…

Q: What causes a star to move off the main sequence?

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Q: A first-magnitude star is 100 times brighter than a sixth-magnitude star, which means each…

A: Given, Ma = -2.1 Mb = 2.9

Q: What is the luminosity of a 5-solar mass main sequence star?

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Q: Given star A with apparent visual magnitude mv = 6.5, and star B with mv = 4.4, what is the flux…

A: Given, star A with apparent visual magnitude mA = 6.5, and star B with mB = 4.4, the flux ratio…

Q: What is the parallax of a star that is 150 pc from Earth?

A: The parallax is given by

Q: A nearby star has a parallax of 0.317 arcseconds. How long does it take the light from this star to…

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Q: If a star has a radial velocity of 25 km/sec and a transverse velocity of 60 km/sec what is the…

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Q: How do you calculate the mass of a star?

A: To calculate mass of a single star is a difficult process however to calculate the mass of binary…

Q: The difference in brightness between a magnitude 3 star and a magnitude 5 star is about

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Q: Over the course of 6 months, a star's parallax angle is measured to be 0.083 arcseconds. What is the…

A: Given that, Parallax angle = 0.083 arcseconds

Q: Calculate the mass of a star having a diameter of 6E5 km and an average density of 1.1 g/cm3

A: It is given that,

Q: Calculate the distance of a star if the stellar spectrum indicates and absolute magnitude of -10 and…

A: The given data are listed below with suitable variables. Here, M denotes the absolute magnitude and…

Q: Which star is more luminous? (you only have one try for this problem) A) A star with absolute…

A: The absolute magnitude is a measure of the star's luminosity and it is defined as: Luminosity (L) =…

Q: Roughly how big (in AU) will the Sun become when it enters the red giant phase?

A: A red giant is a star which is at the end of its evolution cycle. The red giant phase is achieved by…

Q: Star A is located four times farther from Earth than Star B, but both have the same apparent visual…

A: Questions based on the  star apparent and absolute visual magnitude.

Q: What is the luminosity of a star having four times the radius of the Sun and a surface temperature…

A: Given data The surface temperature of the star is: T = 8000 K The radius of the star is four-time…

Q: Suppose that two stars in a binary star system are separated by a distance of 80 million kilometers…

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Q: What is the parallax of a star that is 13.00  light-years away?

A: The parallax is an methond to calculate the distance between the objects in universe. It is based on…

Q: The bright star Sirius has a parallax angle of 0.38 arcsec. Find the distance in parsecs and in…

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Q: Stellar distances are usually expressed in what units?

A: Given: Stellar distances

Q: Star S1 is three times more luminous than S2. What is the difference between their magnitudes…

A: If m1 and m2 the virtual magnitudes of first and second object and L1 and L2 are luminosity of the…

Q: The a star system contains two stars, one with apparent magnitude m = 10.5 and the other with m =…

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