2. (4 pts) A spectral line of 48Ti8+ (of mass 47.95mu) in a distant star was found to be shifted from 654.2 nm to 706.5 nm and to be broadened to 61.8 pm. What is the speed of recession and the surface temperature of the star?
2. (4 pts) A spectral line of 48Ti8+ (of mass 47.95mu) in a distant star was...
1. Doppler shifts have been used to determine the rate of expansion of the universe. a) Given that a distant star is receding at a speed approximately 8% of the speed of light, determine the shift in the observed wavelength for a particular spectral line of 3 ps* that normally has a wavelength of 326 nm b) The FWHM of the spectral line mentioned in the previous problem is 53.8 pm. What is the surface temperature of the star? 1....
If a spectral line from a distant star is measured to have a wavelength of 497.14nm, but is normally at 497.22nm how fast (speed, not velocity) with respect to the Earth is the star moving in m/s?
Suppose that you observe a spectral line in a star at a wavelength of 600.06 nm. Knowing that the same spectral line has a laboratory wavelength of 600.00 nm, what is the velocity of the star along the line of sight (in km/s)
When studying the optical spectrum of a very distant quasar (quasi stellar object), they found that a certain spectral line appears at a wavelength of 612 nm instead of the regular 472 nm. In terms of the speed of the light, what is the radial speed of the quasar with respect to Earth?
2. Which one of the following statements about measuring the mass of an isolated star (a star that is not in a binary star system) is correct? a) the mass of the star can be measured accurately only if its luminosity and temperature can be measured b) the mass of the star cannot be measured accurately c) the mass of the star can be measured accurately only if its distance can be found d) the mass of the star can...
= A1. A distant star is determined to have a surface temperature of Tstar - 6000K and a radius of 5.0 x 108 m. A planet named Hydra is detected orbiting this star at a distance of 1.0 x 1011 m and has an albedo of 0.60. [1] (a) At what wavelength is the peak irradiance from this star? [1] (b) What is the total Luminosity of the star? (c) What is the effective temperature of Hydra? (d) The actual...
Part A Assuming that these spectral lines correspond to the 656.46-nm hydrogen line in the rest frame, estimate the speed V of the center of mass of the binary system. Express your answer in kilometers per second to three significant figures .Part B Determine the mass M of each star. Express your answer in kilograms to one significant figure.
2. A new Earth-like planet is found orbiting a distant star with a circular orbit. The it takes 1.3 Earth years for the planet to make a full circle around it's star. The star has a radius 5 x 1011m. The altitude of the planet's orbit is 8 x 105 km. Find the mass of the star that the new planet is orbiting.
Question 4 20 pts A probe is orbiting a distant moon. The moon has a mass of M = 5.0 x 1022 kg and a radius of R= 1.5 x 106m. The probe makes one revolution every 6 hours. a) Find the distance the probe is above the surface of the moon. b) At what minimum velocity would would a rocket launched from the surface of the moon be able to reach a distance of 2.2 x 10m from the...
Question 4 20 pts A probe is orbiting a distant moon. The moon has a mass of M 5.0 x 1022 kg and a radius of R=1.5 x 106m. The probe makes one revolution every 6 hours. a) Find the distance the probe is above the surface of the moon. b) At what minimum velocity would would a rocket launched from the surface of the moon be able to reach a distance of 2.2 x 10m from the center of...