Star cluster radius D has observer stand in the middle of it.It has apparent magnitude -1.7 .If sun has m=-26.7 and it...
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Star cluster radius D has observer stand in the middle of it.It has apparent magnitude -1.7 .If sun has m=-26.7 and it...
1. A star has a parallax of 0.324 arcseconds and apparent magnitude in V-band m= +1.55....
1. A star has a parallax of 0.324 arcseconds and apparent magnitude in V-band m= +1.55. Later observations reveal that the “star” is actually a close binary, with members star 1 and star 2. Star 1 is found to have mı = +1.83. (a) Find the apparent magnitude of star 2, m2. [2 marks] (b) What is the ratio of the V-band flux received from star 1 to that received from star 2? (c) Find the distance to the system...
A star has apparent magnitude 10.0 and absolute magnitude 4.5. How far away is it? Express...
A star has apparent magnitude 10.0 and absolute magnitude 4.5. How far away is it? Express your answer using two significant figures.
Question 2. The supergiant star Rigel has a parallax 3.78 mas, apparent magnitude m = 0.1,...
Question 2. The supergiant star Rigel has a parallax 3.78 mas, apparent magnitude m = 0.1, and surface temperature T = 12,100 K. Calculate its: distance [parsec] luminosity [solar units], radius [solar radii]
An isolated star with the radius of the Sun (6.95 × 108 m) rotates on an...
An isolated star with the radius of the Sun (6.95 × 108 m) rotates on an axis through its centre once every 2.16 × 106 s. It collapses under gravity to form a much denser star with the radius of the Earth (6.38 × 106 m). For the purposes of this question, you may assume that no matter is lost from the star during its collapse. You may also treat the star as a homogeneous sphere before and after the...
Question 1. A star has a parallax 0.043 arcsec and an apparent magnitude m = 7.8....
Question 1. A star has a parallax 0.043 arcsec and an apparent magnitude m = 7.8. Calculate its distance (parsec) and luminosity. Express the luminosity in watts and as a percentage of the solar luminosity.
9) How distant is a star whose modulus is -7.5? 10) If its apparent magnitude (m)...
9) How distant is a star whose modulus is -7.5? 10) If its apparent magnitude (m) = +13.5 and absolute magnitude (M) = +10, what is the distance to a star? PROBLEMS TO COMPLETE FOR PARALLAX 11) A star has a parallax of .025 seconds of arc—what is its distance in parsecs? The nearest star has a parallax of 76 arc seconds—what is its distance in light years? 12) If star were 2.40 pc from Earth, what would its distance...
Imagine we find a star that has the same radius as the Sun, but its temperature...
Imagine we find a star that has the same radius as the Sun, but its temperature is 9.6 times greater. That star should be _____ times as luminous as the Sun. Suppose we find a planet with an orbital period of 200 days around a star with the same mass as the Sun, but only 75 percent as luminous. What is the planet’s semi-major axis, in AU?
The star Sirius has an apparent magnitude ?V = −1.46 and a parallax ? = 0.37921”.(a)...
The star Sirius has an apparent magnitude ?V = −1.46 and a parallax ? = 0.37921”.(a) Calculate its distance and absolute magnitude. (b) What would Sirius’ parallax be if it were measured from an observatory on Neptune’s moon Triton as Neptune orbited theSun?
correct? 16. The star Sinbad 7 has an apparent magnitude of 4.73 and an absolute magnitude...
correct?
16. The star Sinbad 7 has an apparent magnitude of 4.73 and an absolute magnitude of 4.73. Determine the distance to Sinbad 7 in parsecs. 2 points O A 17.25 pc O B. 4.73 pc C. 10.0 pc O D. 23.7 pc O E. Cannot be determined without knowing the spectral type.
Star A has radius R, a temperature of T degrees Kelvin, and is at a distance...
Star A has radius R, a temperature of T degrees Kelvin, and is at a distance D from Earth. Star B has radius 2R, a temperature 3T and is at a distance 4D from Earth. Star A has an apparent brightness of P watts per square meter. What is the apparent brightness of star B as a multiple of P?
9) How distant is a star whose modulus is -7.5? 10) If its apparent magnitude (m) = +13.5 and absolute magnitude (M) = +10, what is the distance to a star? PROBLEMS TO COMPLETE FOR PARALLAX 11) A star has a parallax of .025 seconds of arc—what is its distance in parsecs? The nearest star has a parallax of 76 arc seconds—what is its distance in light years? 12) If star were 2.40 pc from Earth, what would its distance...
correct?
16. The star Sinbad 7 has an apparent magnitude of 4.73 and an absolute magnitude of 4.73. Determine the distance to Sinbad 7 in parsecs. 2 points O A 17.25 pc O B. 4.73 pc C. 10.0 pc O D. 23.7 pc O E. Cannot be determined without knowing the spectral type.
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